USACE / NAVFAC / AFCESA / NASA UFGS-44 46 16 (April 2006)
--------------------------
Preparing Activity: USACE Superseding
UFGS-44 46 16 (August 2004)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 44 46 16
RECESSED CHAMBER FILTER PRESS SYSTEM
04/06
NOTE: This guide specification covers the requirements for recessed chamber
filter presses.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome and should
be directed to the technical proponent of the specification. A listing of technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
PART 1 GENERAL
NOTE: This guide specification provides requirements for both fixed volume
and variable volume recessed filter press systems. The fixed volume system
involves the use of fixed volume recessed chambered plates. This system is
used for applications requiring 690 to 1550 kPa (100 to 225 psi) filtering pressure.
The variable volume system involves the use of fixed volume recessed chamber
plates equipped with a diaphragm that is inflated with water or air to apply
the squeezing force for the filtration cycle. The variable volume system is
typically used for applications requiring very dry sludge cake. The variable
volume system typically requires a sludge feed filling rate pressure ranging
from 350 to 690 kPa (50 to 100 psi) with a diaphragm squeezing pressure ranging
from 690 to 1550 kPa (100 to 225 psi) or greater. For applications requiring
diaphragm inflation pressures greater than 1030 kPa (150 psi), only water inflation
is recommended to inflate the diaphragms because of the inherent danger of using
air for this type of pressurized system.
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[AMERICAN IRON AND STEEL INSTITUTE (AISI)AISI SG03-3(2002) Cold-Formed Steel Design Manual Set][AMERICAN LADDER INSTITUTE (ALI/LADDER)ALI/LADDER A14.3(2002) Standard for Fixed Ladders and Safety Requirements][AMERICAN WATER WORKS ASSOCIATION (AWWA)AWWA C110/A21.10(2008) Ductile-Iron and Gray-Iron Fittings for WaterAWWA C111/A21.11(2000) Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and FittingsAWWA C115/A21.15(2005) Flanged Ductile-Iron Pipe With Ductile-Iron or Gray-Iron Threaded FlangesAWWA C151/A21.51(2002; Errata 2002) Ductile-Iron Pipe, Centrifugally Cast, for WaterAWWA C500(2002; R 2003) Metal-Seated Gate Valves for Water Supply ServiceAWWA C504(2006) Standard for Rubber-Seated Butterfly ValvesAWWA C509(2001) Resilient-Seated Gate Valves for Water Supply ServiceAWWA D100(2007) Welded Steel Tanks for Water Storage][AMERICAN WELDING SOCIETY (AWS)AWS B2.1(2005; Errata 2006; Errata 2006) Welding Procedure and Performance QualificationAWS D1.1/D1.1M(2008) Structural Welding Code - Steel][ASME INTERNATIONAL (ASME)ASME B1.20.1(1983; R 2006) Pipe Threads, General Purpose (Inch)ASME B16.1(2005) Standard for Gray Iron Threaded Fittings; Classes 125 and 250ASME B16.11(2005) Forged Fittings, Socket-Welding and ThreadedASME B16.21(2005) Nonmetallic Flat Gaskets for Pipe FlangesASME B16.34(2004) Valves - Flanged, Threaded and Welding EndASME B16.5(2003) Standard for Pipe Flanges and Flanged Fittings: NPS 1/2 Through NPS 24ASME B16.9(2007) Standard for Factory-Made Wrought Steel Buttwelding FittingsASME B31.1(2007; Addenda 2008) Power PipingASME B40.100(2005) Pressure Gauges and Gauge AttachmentsASME BPVC SEC IX(2007; Addenda 2008) Boiler and Pressure Vessel Code; Section IX, Welding and Brazing Qualifications][ASTM INTERNATIONAL (ASTM)ASTM A 105/A 105M(2005) Standard Specification for Carbon Steel Forgings for Piping ApplicationsASTM A 153/A 153M(2005) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel HardwareASTM A 167(1999; R 2004) Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and StripASTM A 182/A 182M(2008a) Standard Specification for Forged or Rolled Alloy-Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature ServiceASTM A 193/A 193M(2008b) Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature ServiceASTM A 194/A 194M(2008b) Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High-Pressure or High-Temperature Service, or BothASTM A 276(2008a) Standard Specification for Stainless Steel Bars and ShapesASTM A 283/A 283M(2003; R 2007) Standard Specification for Low and Intermediate Tensile Strength Carbon Steel PlatesASTM A 307(2007b) Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile StrengthASTM A 312/A 312M(2008a) Standard Specification for Seamless, Welded, and Heavily Worked Austenitic Stainless Steel PipesASTM A 36/A 36M(2008) Standard Specification for Carbon Structural SteelASTM A 436(1984; R 2006) Standard Specification for Austenitic Gray Iron CastingsASTM A 53/A 53M(2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and SeamlessASTM A 536(1984e1; R 2004) Standard Specification for Ductile Iron CastingsASTM C 582(2002) Contact-Molded Reinforced Thermosetting Plastic (RTP) Laminates for Corrosion-Resistant EquipmentASTM D 1784(2008) Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC) CompoundsASTM D 1785(2006) Standard Specification for Poly(Vinyl Chloride) (PVC), Plastic Pipe, Schedules 40, 80, and 120ASTM D 2241(2005) Standard Specification for Poly(Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series)ASTM D 2564(2004e1) Standard Specification for Solvent Cements for Poly(Vinyl Chloride) (PVC) Plastic Piping SystemsASTM D 3139(1998; R 2005) Joints for Plastic Pressure Pipes Using Flexible Elastomeric SealsASTM D 3222(2005) Unmodified Poly(Vinylidene Fluoride) (PVDF) Molding Extrusion and Coating MaterialsASTM D 3299(2008) Filament-Wound Glass-Fiber-Reinforced Thermoset Resin Corrosion-Resistant TanksASTM D 3308(2006) PTFE Resin Skived TapeASTM D 4097(2001) Contact-Molded Glass-Fiber-Reinforced Thermoset Resin Corrosion-Resistant TanksASTM D 638(2008) Standard Test Method for Tensile Properties of PlasticsASTM D 785(2008) Rockwell Hardness of Plastics and Electrical Insulating MaterialsASTM D 790(2007e1) Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating MaterialsASTM F 477(2008) Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe][ISA - INTERNATIONAL SOCIETY OF AUTOMATION (ISA)ISA 5.1(1984; R 1992) Instrumentation Symbols and Identification][MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY (MSS)MSS SP-58(2002) Standard for Pipe Hangers and Supports - Materials, Design and ManufactureMSS SP-69(2003; R 2004) Standard for Pipe Hangers and Supports - Selection and Application][NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)NEMA ICS 1(2000; R 2005; R 2008) Standard for Industrial Control and Systems General RequirementsNEMA MG 1(2007; Errata 2008) Standard for Motors and Generators][THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)SSPC PS 13.01(1982; E 2004) Epoxy-Polyamide Painting SystemSSPC SP 6(7) Commercial Blast Cleaning]1.2 SYSTEM DESCRIPTION
Each recessed [fixed-volume][variable-volume] chamber filter press unit and accessories shall efficiently dewater
sludge for handling as dry cake.
1.2.1 Service Conditions
NOTE: Conditioning agents, such as lime, ferric chloride, or polymers, may
be required to enhance filterability. Delete inapplicable conditioning agents.
The characteristics of the sludge to be dewatered are:
Sludge Type [Biological] [Metal Precipitation]
[Domestic Wastewater] [_____]
Filter Feed % Solids by Weight (Approximate) [_____]
pH [_____]
Temperature [_____]
Elevation (Above Mean Sea Level) [_____]
Each Conditioning Agent Type [_____]
Each Conditioner % Feed Solids [_____]
1.2.2 Design Criteria
Each filter press unit shall meet or exceed the following criteria:
Type, Recessed Plate [Fixed-Volume] [Variable-Volume]
Number of Units [_____]
Unit volume per cycle, cubic meters [_____]
Filter cake thickness, mm [_____]
Plate size, mm by mm [_____] by [_____]
Expansion percent [_____]
Maximum Operating Pressure, kPa [690] [1550] [_____]
Feed inlet connection diameter, mm [_____]
Filtrate pipes:
Number, minimum [3] [4]
Diameter, mm [_____]
Each filter press unit shall meet or exceed the following criteria:
Type, Recessed Plate [Fixed-Volume] [Variable-Volume]
Number of Units [_____]
Unit volume per cycle, cubic feet [_____]
Filter cake thickness, inch [_____]
Plate size, inch by inch [_____] by [_____]
Expansion percent [_____]
Maximum Operating Pressure, psig [100] [225] [_____]
Feed inlet connection diameter, inch [_____]
Filtrate pipes:
Number, minimum [3] [4]
Diameter, inch [_____]
1.3 SUBMITTALS
NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are for [Contractor Quality Control approval.][information only. When used, a designation following the "G"
designation identifies the office that will review the submittal for the Government.] The following shall be
submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
SD-02 Shop Drawings
Sludge Dewatering Equipment
Drawings that contain complete electrical interconnecting wiring and schematic diagrams for
power, piping, control,and instrumentation circuits to equipment specified; equipment layout
and anchorage; process flow diagrams, and any other details required to demonstrate that the
system has been coordinated and will properly function as a unit. Drawings shall show proposed
layout and anchorage of equipment and appurtenances and equipment relationship to other parts
of the work including clearances required for maintenance and operation.
SD-03 Product Data
Sludge Dewatering Equipment
A complete list of equipment and materials, including manufacturer's descriptive and technical
literature; performance charts and curves; catalog cuts; power requirement demand; and installation
instructions. As a minimum, the list shall include the following data:
a. Filter Press. Equipment dimensions; materials and details of construction; inlet/outlet
sizes and locations; controls; size, make and type of electrical motors; and flow rates.
b. Pumps. Base and pump dimensions; pump type; materials and details of construction; inlet/outlet
locations; size, make, and type of electrical motors; and flow rate and pressure capacities.
c. Tanks. Dimensions; materials and details of construction; inlet/outlet sizes and locations;
and chemical feed pipe and diffuser size, location, and materials.
d. Mixers. Identification/location; impeller size, type, and material; shaft size, material,
and number of sections; size, make, and type of electrical motors; electrical control equipment
type; specifications, details, input and output speeds, exact gear ratio, and service factor
(24-hour continuous service) of gear reducers; and connection and mounting details.
Spare Parts
Spare parts data for materials and for each different item of equipment, after approval of
the detail drawings, and not later than [2] [_____] months prior to the date of beneficial occupancy.
The data shall include a complete list of parts and supplies, with current unit prices and source
of supply.
Posting Framed Instructions
Proposed diagrams, instructions, and other sheets prior to posting.
Welding
A copy of qualified procedures and a list of names and identification symbols of qualified
welders and welding operators.
SD-06 Test Reports
Factory Tests
Test reports in booklet form showing the results of factory tests performed.
Field Tests and Inspections
Test reports in booklet form showing results of the field tests performed to adjust each component
following the installation of the system and the field tests performed to prove compliance with
the specified performance criteria. Each test report shall indicate the final position of controls.
SD-07 Certificates
Sludge Dewatering Equipment
Manufacturer's certificates attesting that the equipment meets the specified requirements.
SD-10 Operation and Maintenance Data
Sludge Dewatering Equipment
[Six] [_____] copies of operating and maintenance instructions, prepared by the manufacturer,
the step-by-step procedures required for system startup, operation and shutdown, routine maintenance,
possible breakdowns and repairs, and troubleshooting. These instructions shall include the
manufacturer's name, model number, service manual, parts list, and brief description of the
equipment and their basic operating features. Each set shall be permanently bound and shall
have a hard cover. The following identification shall be inscribed on the covers: the words
"OPERATING AND MAINTENANCE INSTRUCTIONS," name and location of the facility, name of the Contractor,
and contract number. These instructions shall include, but not be limited to, the following:
a. System layout showing piping, valves, and controls.
b. Approved wiring and control diagrams prepared in accordance with ISA 5.1 including a drawing
index, legend and symbols list, and abbreviations and identifiers.
c. A control sequence describing startup, operation, and shutdown.
d. Operating and maintenance instructions for each piece of equipment, including lubrication
instructions and troubleshooting guide.
e. Manufacturer's bulletins, cut sheets and descriptive data, parts lists, and recommended
spare parts.
1.4 DELIVERY, STORAGE, AND HANDLING
The filter press system shall be delivered completely assembled to the maximum extent possible, and shipped on
skids. Equipment delivered and placed in storage shall be stored with protection from the weather, excessive
humidity and temperature variations, dirt, dust, or other contaminants as required by the manufacturer.
PART 2 PRODUCTS
2.1 GENERAL MATERIAL REQUIREMENTS
Materials for common equipment used throughout this specification shall conform to the following requirements.
Materials for specific components and accessories shall be as specified. Recyclable materials shall conform
to EPA requirements in accordance with Section 01 62 35 RECYCLED / RECOVERED MATERIALS.
2.1.1 Standard Products
Provide materials and equipment which are the standard products of a manufacturer regularly engaged in the manufacture
of the products and that essentially duplicate items that have been in satisfactory use in similar facilities
for at least 2 years prior to bid opening. Equipment shall be supported by a service organization that is, in
the opinion of the Contracting Officer, reasonably convenient to the site.
2.1.2 Nameplates
Filter presses, pumps, tanks, mixers, panels and motors shall have the manufacturer's name, address, type or
style, model or serial number, and catalog number on a stainless steel plate permanently secured to the item
of equipment.
2.1.3 Protection of Moving Parts
Completely enclose belts, chains, couplings, and other moving parts by guards to prevent accidental personal
injury. Guards shall be removable or arranged to allow access to the equipment for maintenance. If equipment
is in a lockable housing, no additional guards are necessary.
2.1.4 Special Tools
Provide one set of special tools, calibration devices, and instruments required for operation, calibration, and
maintenance of the equipment.
2.2 MATERIALS
2.2.1 Steel Plates, Shapes and Bars
ASTM A 36/A 36M.
2.2.2 Pipe and Fittings
NOTE: Delete items in paragraph: PIPE AND FITTINGS, paragraph: PIPE HANGERS
AND SUPPORTS, paragraph: VALVES, and paragraph: OTHER MATERIALS, and reference
Section 40 05 13 PIPELINES, LIQUID PROCESS PIPING, for specific requirements
if that section is included in the specifications.
[Pipe and fittings shall conform to the requirements specified in Section 40 05 13 PIPELINES, LIQUID PROCESS
PIPING.]
2.2.2.1 Steel Pipe
ASTM A 53/A 53M.
a. Flanged Fittings: ASTM A 105/A 105M.
b. Welded Fittings: ASME B16.9, ASME B16.11.
c. Bolts and Nuts: ASTM A 193/A 193M, Grade B5; ASTM A 194/A 194M.
2.2.2.2 Ductile-Iron Pipe
AWWA C115/A21.15.
a. Flanged Pipe: AWWA C115/A21.15, with ASME B16.1, Class 125 flanges.
b. Rubber-Gasket Joints: AWWA C111/A21.11.
c. Fittings: AWWA C110/A21.10.
d. Push-On Joints: AWWA C151/A21.51.
e. Bolts and Nuts: ASTM A 307, Grade B.
2.2.2.3 Stainless Steel Pipe
ASTM A 312/A 312M, Schedule 40, Type 316 or Type 304.
a. Flanged Pipe: ASTM A 182/A 182M, Class 150, drilled to ASME B16.5.
b. Rubber-Gasket Joints: [ASME B16.5] [ASME B16.21].
c. Threaded Fittings: ASME B16.11.
d. Bolts: ASTM A 193/A 193M, Class 1, Grade B8.
e. Nuts: ASTM A 194/A 194M, Grade 8.
2.2.2.4 Polyvinyl Chloride (PVC) Pipe and Fittings
PVC pipe and fittings less than 100 mm 4 inch diameter shall be in accordance with ASTM D 1785 or ASTM D 2241
. PVC pipe and fittings 100 mm 4 inches in diameter and larger shall be in accordance with ASTM D 2241 and shall
have push-on joints.
a. Push-On Joints: ASTM D 3139 or ASTM F 477.
b. Solvent Cement: ASTM D 2564.
2.2.3 Pipe Hangers and Supports
NOTE: Coordinate hanger and support requirements with Section 40 05 13 PIPELINES,
LIQUID PROCESS PIPING, if that section is included in the project, otherwise
use the reference provided.
[Hangers and supports shall conform with the requirements identified in Section 40 05 13 PIPELINES, LIQUID PROCESS
PIPING.][MSS SP-58 and MSS SP-69.]
2.2.4 Valves
[Valves shall conform to the requirements specified in Section 40 05 13 PIPELINES, LIQUID PROCESS PIPING.] [Valves
shall be rated for a[ 1.03 MPa 150 psig][[_____] MPa psig service]. Valves shall have steel or cast iron bodies
unless otherwise shown or specified.] Threaded or socket welded connections shall conform to ASME B16.11, flanged
connections shall conform to [ASME B16.1] [ASME B16.5], and valves for high temperature service shall conform
to:
2.2.4.1 Globe and Angle Valves
Globe valves, 80 mm 3 inches and smaller, shall be [angle pattern] [globe style] valve [and shall have [bronze]
[TP316 stainless steel] [_____] bodies,] with [bronze] [brass] [stainless steel] [_____] trim, and [bronze] [brass]
[_____] bonnets. Valves shall include [union] [threaded] [OS&Y] bonnets, inside screws, rising stems, [plug]
[needle] [conventional] discs constructed of [polytetrafluoroethylene (PTFE)] [butadiene acrylonitrile] [bronze]
[stainless steel] [_____], and [bronze] [brass] [stainless steel] [_____] rings. Valves shall be equipped with
[handwheel] [pneumatically actuated] [electrically actuated] [_____] operators.
2.2.4.2 Gate Valves
Valves 50 mm 2 inches and smaller, shall have [bronze] [_____] bodies and stems, [screwed] [union] [bolted] [yoke]
bronze [_____] bonnets, single [solid] [split] wedge bronze discs, and [rising] [non-rising] stems. Valves 65
mm 2.5 inches and larger, shall have [iron] [bronze] [Ni-resistant stainless steel] [_____] trim. Valves shall
meet the requirements of [AWWA C500] [AWWA C509]. Bonnet shall be a [clamp] [OS&Y Bolted] [NRS Bolted] type.
Discs shall be [wedge] [double] type of [iron] [bronze] [ductile iron] [bronze faced iron] [rubber coated ductile
iron] [_____] construction, and have [nonrising] [rising] stems [with backseats]. Valves shall be equipped with
[handwheel] [pneumatically actuated] [electrically actuated] [_____] operators.
2.2.4.3 Plug Valves
[Nonlubricated] [lubricated] type eccentric valves, 80 mm 3 inches through 1350 mm 54 inches, shall have drip-tight
shutoff with pressure from either direction, [and [Ni-resistant] [aluminum] [stainless steel] [nickel] [_____]
bodies]. Plugs shall be cast iron with [round] [or] [rectangular] ports of no less than [80] [_____] percent
of the connecting pipe area [and coated with] [butadiene acrylonitrile] [chloroprene] [fluoro-elastomer] [hard
natural rubber] [_____]. Valves shall have [stainless steel] [nickel] [_____] seats, self-lubricating [stainless
steel] [reinforced polytetrafluoroethylene (PTFE)] [_____] stem bearings, and [multiple [V-rings] [U-cups] [O-rings]
stem seals] [[nitrile rubber] grit seals on the stems]. [Valves shall be equipped with [handwheel] [pneumatically
actuated] [electrically actuated] [_____] operators.] [Valves 150 mm 6 inches and smaller shall have a wrench
lever manual operator and valves 200 mm 8 inches and larger shall have a totally enclosed, geared, manual operator
with handwheel, 50 mm 2-inch nut, or chain wheel.] [Valves shall conform to ASME B16.34 Class [_____].]
2.2.4.4 Butterfly Valves
Butterfly valves, 50 mm 2 inch and larger, shall be [[wafer] [lugged] styled]. Valves shall conform to [AWWA C504
Class [125] [150] [_____]] [ASME B16.34 Class [_____]]. Discs shall be contoured [ASTM A 436 Type 1 Ni-resist
cast iron with maximum lead content of 0.003 percent] [ASTM A 536 Grade 65-45-12 ductile iron] [stainless steel]
[polyvinylidene fluoride (PVDF) coated ductile iron] [bronze] [_____]. The valve shafts shall be [carbon steel]
[stainless steel] [_____] with self-lubricating, corrosion-resistant sleeve type bearings. Valve seats for [
600 mm 24 inch] [_____] and smaller valves shall be attached to either the valve body or the disc and shall be
constructed of [chloroprene] [_____]. Valves shall have [manual, locking hand lever] [hand wheel] [crank] [chain
wheel] [pneumatically actuated] [electrically actuated] [_____] operators.
2.2.4.5 Ball Valves
Ball valves, 50 mm 2 inch and smaller, shall be end entry type with [bronze] [brass] [_____] bodies and [threaded,
in accordance with ASME B1.20.1,] [_____], [full bore] [regular] ports. Valves shall have [polytetrafluoroethylene
(PTFE)] [_____] seats and packing, [chrome plated] [brass] [stainless steel] [_____] balls and [hand lever] [tee-handle]
[hand wheel] [pneumatically actuated] [electrically actuated] [_____] operators. [A union shall be installed
adjacent to the valves to provide access to the seat.] Ball valves, 50 mm 2 inch to 300 mm 12 inches, shall
conform to ASME B16.34 Class [_____], [and have a [bronze] [TP316 stainless steel] [_____] body,] stainless steel
ball and stem, polytetrafluoroethylene (PTFE) packing and gasket, and [flanged] [welding] [_____] ends, full
port. Valves shall have [hand lever] [pneumatically actuated] [electrically actuated] [_____] operators.
2.2.4.6 Check Valves
Swing check valves, shall have a [bronze] [TP316 stainless steel] [_____] body. Valves 50 mm 2 inches and smaller,
shall have a swing type, replaceable [butadiene acrylonitrile] [polytetrafluoroethylene (PTFE)] [_____] disc.
Valves 65 mm 2.5 inches through 300 mm 12 inches, shall have a bronze-mounted swing type, [bronze] [ductile iron]
[cast iron] [_____] disc, [solid bronze] [ductile iron] [_____] hinges, and stainless steel hinge shaft [with
outside lever and [weight] [spring]].
2.2.4.7 Polyvinyl Chloride (PVC) Valves
Thermoplastic valves, 150 mm 6 inches and smaller, shall be rated for [1.03 MPa 150 psig] and have ASTM D 1784
, Class 12454-B, [polyvinyl chloride (PVC)] [chlorinated polyvinyl chloride (CPVC)] [ASTM D 3222 polyvinylidene
fluoride (PVDF)] [_____] bodies, and stems. Valves shall be double union design, with [solvent-weld socket]
[threaded, in accordance with ASME B1.20.1,] [flanged] [butt] [_____] end connections, [ethylene propylene diene
monomer (EPDM)] [fluoro-elastomer] [_____] seats, and [fluoro-elastomer] [polytetrafluoroethylene (PTFE)] [ethylene
propylene diene monomer (EPDM)] [_____] O-ring stem seals. Valves shall have [handwheel or lever] [pneumatically
actuated] [electrically actuated] [_____] operators where applicable or indicated.
2.2.5 Other Materials
[Joint compound and joint tape shall conform with the requirements identified in Section 40 05 13 PIPELINES,
LIQUID PROCESS PIPING.]
2.2.5.1 Joint Compound
Joint compound for threaded joints shall be a stiff mixture of graphite and oil, inert filler and oil, or a graphite
compound.
2.2.5.2 Joint Tape
Joint tape for threaded joints shall comply with ASTM D 3308.
2.3 MANUFACTURED UNITS - GENERAL REQUIREMENTS
2.3.1 Electrical Products
Electrical products shall be furnished and installed in accordance with the applicable requirements of Section
26 20 00 INTERIOR DISTRIBUTION SYSTEM.
2.3.2 Electric Motors
Motors shall conform to NEMA MG 1. Motors with nameplate horsepowers equal to or greater than 380 watt 1/2 hp
shall be suitable for 480 volt, 3 phase operating service, unless otherwise specified. Motors equal to or greater
than 760 watt 1 hp shall be high efficiency type as specified in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM.
Motors less than 380 watt 1/2 hp shall be provided with internal thermal overload protection or motor starters
suitable for [120] [240] volt, single phase, operating service.
2.3.3 Motor Controls
Controls shall conform to NEMA ICS 1.
2.3.4 Bolts, Nuts, Anchors, and Washers
Bolts, nuts, anchors, and washers shall be steel, galvanized in accordance with ASTM A 153/A 153M.
2.3.5 Pressure Gauges
Gauge sizes and scale ranges shall be as indicated or as specified. Gauges shall comply with ASME B40.100, Type
2A, as a minimum. Compound gauges shall be provided on the suction side of pumps and standard pressure gauge
on the discharge side of pumps. Gauges shall have clear acrylic or shatterproof glass windows and shock-resistant
cases. The design operation should be at the midpoint of the graduated scale. Gauge scales shall have a minimum
of 5 major and 50 minor divisions. Major divisions shall be equally spaced and shall be in integers. Scale
units shall be engraved on the scale face. Pointer travel shall be not less than 200 degrees nor more than 270
degrees arc. Gauge accuracy shall be plus or minus 0.5 percent of span. Each gauge, except those for hydraulic
systems, shall have a process shutoff valve.
2.3.6 Valves
NOTE: "Fire safe" valves are recommended for pneumatic controls for sludge
service, but non-metallic valves may be acceptable when non-metallic piping
is used.
2.3.6.1 Automated Valves
Automatic valves used for sludge service shall be pneumatic cylinder operated, [fire safe,] [non-metallic,] full
port ball valves. Valves 50 mm 2 inches and larger shall be flanged in accordance with ASME B16.5 Class 150.
Cylinder operators shall be sized for operation at sludge pressures up to 1720 kPa 250 psig when supplied by
air at 690 kPa 100 psig. Valves shall be equipped with limit switches to indicate full open and full closed
positions. Solenoid valves shall be shop piped to the cylinder operators.
2.3.6.2 Manual Valves
Manual valves shall be as defined above except operators and limit switches will not be required.
2.3.7 Tank Requirements
The tanks specified include the filtrate collection and weir, [sludge conditioning,] [precoat,] [acid wash,]
[membrane water,] [_____,] and filter media wash tanks. These tanks shall be provided in accordance with the
following general requirements, unless otherwise indicated. Additional requirements are also provided in the
paragraph that describes the application of each specific type of tank.
2.3.7.1 General Tank Requirements
Each tank shall include flanged fittings for inlet, outlet, overflow and drain. The nozzle size, elevation,
and orientation shall be provided in accordance with construction drawings. Hold down lugs shall be provided
to anchor the tank to the base. A cover shall be provided with a piano type hinged access door for inspection
and cleaning of the tank. Single pole double throw level switches shall be provided. Switch contacts shall
be rated 5 amps, 120 volts ac inductive load minimum. Switch leads shall extend to a NEMA 4 junction box located
1.5 m 5 feet above floor level. Leads shall terminate on terminal strips using ring tongue connectors and shall
be identified.
2.3.7.2 Tank Construction Materials
NOTE: If carbon steel tanks are specified, include section based on Section
09 97 02 PAINTING, HYDRAULIC STRUCTURES or incorporate applicable provisions
in paragraph PAINTING.
The tank construction material shall be compatible with the material stored. Tanks constructed of polyethylene,
polypropylene, and fiberglass reinforced plastic (FRP) shall conform to applicable material and construction
provisions of ASTM C 582, ASTM D 3299, and ASTM D 4097. Steel tanks shall conform to AWWA D100. Carbon steel
tanks shall be ASTM A 283/A 283M carbon steel Grade C or D and shall be protected with an interior coating system
appropriate for the intended service in accordance with Section 09 97 02 PAINTING, HYDRAULIC STRUCTURES. Stainless
steel tanks shall be Type 304 stainless steel conforming to ASTM A 167 with structural supports conforming to
ASTM A 276. Exterior painting or coating shall be provided in accordance with paragraph PAINTING.
2.3.7.3 Access Ladders
Access ladders and platforms for access to the tank tops shall conform to ALI/LADDER A14.3. The ladder shall
be fabricated of [fiberglass reinforced plastic shapes] [stainless steel coated with a 3 mm 1/8 inch minimum
thickness of reinforced resin]. Rungs shall be serrated or grooved longitudinally to provide a nonslip surface.
Splices and connections shall have a smooth transition without projections that are sharp or more extensive than
required for joint strength. Rails shall be fitted with brackets for anchorage to structure. The top of the
cage shall be extended 1.1 m 3 feet 6 inches above the tank and shall be connected to the tank roof. A minimum
of 200 mm 8 inches clearance between the tank wall and the ladder rungs shall be maintained. The last rung of
the ladder on top shall be at the same level as the top of the tank.
2.3.7.4 Tubular Glass Gauge Assembly
A tubular glass gauge assembly shall be provided complete with valves and protector to provide local indication
of liquid level in the tank. The tube shall be 19 mm 3/4 inch O.D. borosilicate glass and shall provide indication
from 0.3 m 1 foot above bottom of tank to the overflow level. The valves shall be offset pattern and of outside
screw and yoke design. Valves shall be provided with a floating shank union vessel connection. Valves shall
be stainless steel ball checks that seat to prevent loss of tank contents should the glass break. Valves shall
be operated by handwheel. A plastic window gauge glass protector shall be installed the entire length of the
indication. A yellow board graduated gauge scale shall be attached to the tank behind the glass in [0.30 mm
1/10 foot] [[_____] mm foot] graduation increments for tank gauging.
2.3.7.5 General Mixer Requirements
Mixers shall be in accordance with the following requirements unless otherwise indicated. Each mixer shall be
mounted in the center top of the tank and shall be suitable for continuous operation. The tank shall be supplied
with baffles as recommended by the mixer manufacturer. Mixers shall be provided with totally enclosed fan cooled
electric motors, for an operation service of 480 volt, three phase, 60 hertz. The mixer shaft and turbine blades
shall be rubber covered carbon steel. The motor short circuit protective device and magnetic starter shall be
remotely located in a motor control center or panels as shown on the drawings. A local disconnect shall be provided
at the motor.
2.4 SLUDGE DEWATERING EQUIPMENT
NOTE: Items noted below shall be identified on the drawings. Delete accessories
or optional features that are not used.
The sludge dewatering equipment shall consist of the filter press components, including the filter press unit
and its ancillary equipment, and accessories required to support the filtration operation. The filter press
unit shall consist of a main structural frame, filter press plates, and filter media. The ancillary equipment
shall include the press closing mechanism, plate shifter, sludge feed and discharge piping, [diaphragm inflation
manifold,] [air and core blowdown assembly,] filtrate collection and weir tank, drip trays, [automatic filter
media water washer assembly,] [safety options,] a filter press control panel, and dewatering system control panel.
The ancillary equipment required for press operation shall be integrally incorporated within each filter press
unit and controlled through the filter press control panel and coordinated with control for accessories provided
through the dewatering system control panel. The accessory systems shall include a sludge feed pump system,
[a raw sludge conditioning system,] [a precoat system,] [an acid wash system,] [membrane water inflation system,]
an air compressor system, and a filter media water wash system. The sludge feed pump system shall transfer sludge
from the sludge conditioning system to the filter press through an automatic pump control system. [The sludge
conditioning system shall include a chemical feed (conditioning agent) point and shall receive raw sludge and
provide sludge to the filter press feed pump system.] [The precoat system shall be provided to precoat the filter
media prior to feeding the filter press with conditioned sludge.] The air compressor system shall provide compressed
air for instrument control and process operations for the filter press. A membrane water inflation system shall
be provided for membrane inflation of the variable-volume recessed plate system. The [manual] [automatic] filter
media water wash system and acid wash system shall be provided for filter media washing.
2.5 FILTER PRESS COMPONENTS
NOTE: Components for both fixed-volume and variable-volume filter presses are
described in this paragraph. Delete components and features that are not required.
Components shall be new, free of defects or mechanical damage and in operating condition.
2.5.1 Main Structural Frame
NOTE: Two types of frames are typically available for filter press applications:
a side bar assembly and an overhead and lower tie bar assembly. The overhead
bar assembly is primarily for larger recessed plate presses greater than 1220
mm (48 inches) higher pressure installations (i.e. 1550 kPa (225 psi)) and variable
volume presses, and for applications with heavy recessed plates such as those
constructed of ductile iron.
The filter press shall be designed for [690 kPa 100 psig] [1550 kPa 225 psig] [[_____] kPa psig] service. The
filter press frame shall be fabricated of ASTM A 36/A 36M steel and consist of a fixed head, movable follower
head, tail stand, and [side bar] [overhead and lower tie bars] beam assembly.
2.5.1.1 Fixed Head
The fixed head shall be fabricated steel construction with welded ribs and shall provide uniform strength over
the entire surface against the filter plate pack. The head shall be free standing with integral attachment points
for anchor bolts. The fixed head end shall incorporate connections for [two side bars for the side bar assembly]
[the [three] [four] corner tie bars, [one] [two] located above the plates for the overhead beam and two below
the plates for overhead bar assembly]. The fixed head end shall contain the necessary connections for the filter
feed and discharge. [The fixed head end shall contain one [_____] mm inch center sludge feed connection and
four [_____] mm inch corner filtrate discharge connections]. [The fixed head end shall contain one [_____] mm
inch corner sludge feed connection and three [_____] mm inch corner filtrate discharge connections.] If variable
volume plates are used, an external manifold with individual high pressure hoses for each plate shall be supplied
in accordance with the requirements provided in the paragraph Diaphragm Plate Piping System.
2.5.1.2 Movable Head
The movable follower head shall be fabricated of steel construction with welded ribs and shall provide uniform
strength over the entire surface against the filter plate pack. The follower head shall be mounted on supports
over the two [side] [overhead] bars for alignment and smooth parallel movement against the plate stack. If the
plate stack is in excess of 80 chambers, connections shall be supplied for sludge feed as described for the fixed
head. Follower movement shall be transmitted by a double-acting hydraulic cylinder attached to the thrust block
on the follower.
2.5.1.3 Tail Stand
The tail stand shall be fabricated steel and shall be free standing with anchor bolt attachment points. The
tail stand shall have a sufficient area to provide acceptable load distribution to the filter foundation. The
tail stand shall support the press closing mechanism. The tail stand shall also have connections to accept the
[two side bars of the side bar assembly] [[three] [four] tie bar/plate supports of the overhead bar assembly].
2.5.1.4 Beam Assembly
The [two side bars of the side bar] [two overhead and two lower tie bars of the overhead] beam assembly shall
interconnect the fixed head and tail stand. The beam assembly shall support the weight of the plates and follower,
and shall provide tensile strength for maintaining closing pressure. The [two side bar] [four overhead] beams
shall be of sufficient width and depth to prevent deflections in excess of 1/900 of the length of the beam assembly
when fully loaded. Intermediate supports of the beams will not be acceptable. Beam flanges shall be stainless
steel clad or have stainless steel caps to facilitate smooth operation of the filter plate shifter.
2.5.2 Filter Press Plates
NOTE: Polypropylene fabricated plates are typically applicable for sludge applications
for pressures of 1550 kPa (225 psi) and less for temperature less than 90 C
(200 F). Above this criteria, glass filled polypropylene or nylon constructed
plates should be considered. In addition to plates constructed of polypropylene,
plates constructed of ductile iron, cast iron, and rubber coated steel are commercially
available.
2.5.2.1 Fixed Volume
The fixed-volume recessed type filter plates shall be of the [center] [corner] feed, corner filtrate discharge
design for operation at [690 kPa 100 psi] [1550 kPa 225 psi] [[_____] kPa psi] pressure at ambient temperature.
The filter plates shall be constructed of polypropylene conforming to ASTM D 638, ASTM D 785, and ASTM D 790.
Plates shall be monolithically molded with integral stay bosses. Plates shall be designed with a short rib quadrant
or piped design that maximizes filtrate flow and provides maximum cloth support. Plate sealing surfaces shall
be machined to maximum parallel plate tolerance of 0.3 mm 0.01 inch. Chamber recess depth dimensions shall have
a tolerance not to exceed 0.5 mm 0.02 inch. Plates for side bar assembly presses shall have handles that are
integrally cast and not mechanically fastened or welded in. Plates shall be of the [non-gasketed] [gasketed]
design. [Gasketed plates shall have a round bottomed caulking groove machined around the perimeter of each drainfield
for installation of filter cloths. Gasketing shall be on the perimeter sealing surface and around each of the
corner eyes. Grooves of the dovetail design shall be machined around each corner port and around the cake chamber
on the sealing surface for the installation of gasketing.] [Non-gasketed plates shall come completed with five
equally spaced cloth dogs along the uppermost edge of the plate for installation of filter cloths.] A head liner
plate and follower liner plate shall be provided with a recess on only the side facing the adjacent filter plate.
Plates shall be complete with filter media installed.
2.5.2.2 Variable Volume
The variable-volume recessed type filter plates shall be of the [center] [corner] feed, corner filtrate discharge
design for filtration operation at [690 kPa 100 psi] [[_____] kPa psi] and diaphragm squeeze operation of [1550
kPa 225 psi] [[_____] kPa psi] pressure at ambient temperatures. The filter press plates shall be constructed
of polypropylene conforming to ASTM D 638, ASTM D 785, and ASTM D 790. Plate bodies shall have integrally molded
stayboss supports equally spaced on the drain field. Plates shall be of the non-gasketed design. Non-gasketed
plates shall come completed with 5 equally spaced cloth dogs along the uppermost edge of the plate for installation
of filter cloths. Plates shall be complete with filter media installed. Diaphragms shall be designed for [water
inflation] [inflation by air]. Each plate body shall have two flexible diaphragm drain fields made of [polypropylene]
[ethylene propylene diene monomer (EPDM)]. Diaphragms shall be [of replaceable construction] [welded to the
plate body]. [Plates shall be of the variable-volume diaphragm squeeze design. The headliner and follower liner
plate shall be provided with a recess and diaphragm on only the side facing the adjacent plate.] [or] [A quantity
of plates equal to one-half of the total number of chambers required shall be of the variable-volume, diaphragm
squeeze design, and shall alternate within the filter pack with filter plates of the fixed volume recessed design.
End plates shall be of the fixed-volume recessed design.]
2.5.3 Filter Media
One set of filter media shall be provided with each press. A standard filter media constructed of polypropylene,
having a multi-filament warp and monofilament (satin) weave, and a porosity of 2.4 L/s 5 cfm, shall be provided,
unless justified by the press manufacturer for the intended service. Cloths shall be of the barrel neck design.
Neck material shall be of the same or less porous material. [Filter media for non-gasketed plates shall have
a series of grommets along three edges. Grommets shall be used to install media on filter plate cloth dogs and
shall be used along vertical sides to insert nylon cloth ties to hold media taut on the plate.] [Filter media
for gasketed plates shall be held in place on the filter plates by a woven, high density polypropylene cord sewn
into the perimeter of the cloth. The filter media shall be pressed or caulked into place on the filter plate
and held by an interference fit.]
2.5.4 Closing Mechanism
The closing mechanism shall consist of a hydraulic cylinder and hydraulic power pack.
2.5.4.1 Hydraulic Cylinder
NOTE: Cylinder sizes, opening pressures, stroke, and rod diameters are dependent
on the size and operation of each specific filter press.
Sealing pressure for each press unit shall be provided by a double acting, hydraulic cylinder which opens and
closes the press unit. The hydraulic system shall be designed to maintain an adequate force to keep the press
closed against the full slurry feed pressure of [690 kPa 100 psi] [1550 kPa 225 psi] [[_____] kPa psi] plus a
minimum safety factor of 25 percent. A cylinder with a minimum [_____] mm inch stroke and [_____] mm inch rod
diameter shall be mounted on the tail stand and positioned so that the piston and rod movement are horizontal.
The piston rod end shall be connected to the follower plate by a ball fit connection to allow limited rotation
of the follower head. A minimum stoke of [_____] mm inches shall be provided to permit sufficient movement of
the follower plate to allow each plate to be shifted and drop filter cakes, and to provide sufficient space for
maintenance between plates. The press manufacturer shall provide the requirements for the cylinder size and
stroking speed and a drawing of the cylinder attachment points. The hydraulic cylinder shall be provided with
a steel rod with a polished and chrome plated finish fabricated in accordance with ASTM A 276 to minimize wear
on the rod packing. A neoprene boot shall fit over the piston rod to preclude entry of foreign material.
2.5.4.2 Hydraulic Power Pack
The hydraulic cylinder shall be pressurized by [an electric] [a pneumatic] hydraulic pumping unit. The pumping
unit shall provide a nominal 34.5 MPa 5,000 psi oil pressure to maintain closing forces during the filtration
cycle. The power pack shall automatically sense the changes due to temperature changes, pressure elongation,
and media compression and adjust to maintain closing pressure for extended cycles completely unattended. The
power pack shall be equipped complete with a hydraulic pump, valves, fittings, pressure regulators, filters,
visible and fully exposed sight glass, and thermal relief valve. [The air driven power pack shall be designed
for a maximum of [_____] kPa psig air to generate up to [_____] L/s gpm of oil flow and up to 3.5 MPa 500 psig
oil pressure.] [The electric driven power pack shall be a totally enclosed fan cooled motor designed for operation
with [480 volt, 3 phase] [240 volt, single phase] service.] The power pack shall be readily detachable from
the filter press frame. The power packs shall be free standing and attached to the filter press by hydraulic
hoses equipped with integral valves in quick connectors that are readily detachable from the filter press if
necessary for maintenance. The oil reservoir shall be equipped with a filter-breather cap, local temperature
indicator and switch, oil level indicator and switch and shall be designed so that the oil can be drained from
the unit at a point 300 mm 12 inches minimum above the floor and refilled without the use of pumps. The oil
reservoir shall be integral to the hydraulic cylinder mount acting as a heat sink to prevent overheating of the
hydraulic system.
2.5.5 Plate Shifter
NOTE: Plate shifters can be manually, semiautomatically, or automatically controlled.
A semiautomatic type plate shifter is typically optional, but should be provided
for presses with plates larger than 800 mm (32 inches).
Plate movement for cake discharge shall be accomplished by means of a [semiautomatic] [automatic] [manual] plate
shifter. The [semiautomatic] [automatic] plate shifter shall consist of one shifter carriage, mounted within
the beam plate suspension system of the filter press to pick up and transport only one plate at a time. The
shifter shall be an electric/hydraulic driven variable speed reciprocating type. Shifting shall be accomplished
by the operator opening the follower and shifting the plate shifter into automatic operation. The shifter carriage
shall extend and pick up each plate by the plate suspension bracket and pull it to the fully opened position,
discharging the plate against the follower. The plate shifting mechanism shall be driven by a variable speed
reversing [electric] [hydraulic] motor/gear reducer, totally enclosed fan cooled assembly with [_____] watt hp
for an operating service of 480 volts, three phase. The unit shall then reverse and return to pick up the next
plate. Plate suspension brackets shall be designed to provide parallel movement of the plates without pendulum
movement. The brackets shall have an integral latching system that shall prevent shifting of more than one plate
at a time. The exposed portions of the shifter latching mechanisms shall be made from [316 stainless steel]
[high density linear polyethylene] with 300 series stainless steel springs actuating the engagement pawls. A
pendant or trigger control station shall be provided to allow the operator to interrupt the shifting sequence
to inspect, remove cake, clean or otherwise attend to any individual plate. Sufficient extended urethane pneumatic
cable shall be provided to allow the operator to manipulate the control from anywhere along the length of the
plate stack. The system shall be designed to provide a restart button only from the filter press control panel.
2.5.6 Sludge Feed and Discharge Piping
NOTE: Plastic PVC piping is not recommended for operating pressures greater
than 690 kPa (100 psi). Carbon or stainless steel piping is recommended for
applications greater than 690 kPa (100 psi) pressure.
Feed and discharge piping shall be fabricated of [PVC] [carbon steel] [[304] [316] stainless steel]. The [_____]
mm inch piping shall be provided with connections through the head from the center feed slurry port and corner
filtrate discharge ports in the filter pack through the fixed-end head. Threads shall be NPT standard.
2.5.6.1 Air Blowdown Manifold
NOTE: This manifold is only required with the optional air blowdown operation.
The air blowdown operation removes entrained filtrate from the filter cake by
the introduction of compressed air prior to cake discharge.
The air blowdown manifold shall be fabricated of [schedule 80 PVC] [carbon steel] [[304] [316] stainless steel]
and shall consist of the necessary piping and valves to join the four filtrate discharge ports located on the
fixed head into a common discharge pipe. Automatic closing of the valves and introducing air into an upper filtrate
port shall force air through the filter cake in each press chamber and result in discharge of excess filtrate
to the alternating lower filtrate discharge port. The system shall be rated for a minimum operating pressure
of 280 kPa 40 psi. A 0 to 420 kPa 0 to 60 psi air regulator and pressure gauge to control and monitor air blowdown
shall be supplied, in accordance with the requirements for pressure regulators presented in Section 22 00 00
PLUMBING, GENERAL PURPOSE.
2.5.6.2 Core Blow System
NOTE: This system is only required when the optional core blow operation is
used. The core blow operation consists of the removal of excess liquid sludge
from the feed eye or core by the introduction of compressed air prior to cake
discharge.
The core blow system shall consist of an air line and valve fabricated of [schedule 80 PVC] [carbon steel] [[304]
[316] stainless steel] and attached to the tail plate. The system shall be rated for a minimum pressure of 550
to 690 kPa 80 to 100 psig to force excess sludge feed in the core of the press back out of the center feed inlet.
Closing and opening of valves shall be provided by controls operating the press. This process shall be performed
after air blowdown.
2.5.7 Diaphragm Plate Piping System
NOTE: The diaphragm plate piping system is only required for variable-volume
plate filter press applications.
A diaphragm plate piping system header shall be supplied as an integral component of the filter press skeleton.
The header shall be fabricated from [_____] mm inch diameter schedule 40, [304 stainless steel] [carbon steel]
pipe. The header system shall come complete with header and individual flexible reinforced hoses that are connected
to the header and each individual diaphragm filter plate by swivel connectors and mounted so as not to interfere
with late shifting, cake discharge, or other ancillary functions. The system shall be rated for a minimum operating
pressure of [1550 kPa 225 psi] [_____].
2.5.8 Filtrate Collection and Weir Tank
Each filter shall be provided with a filtrate collection and weir tank to measure and indicate terminal filtrate
flow. The weir tank shall be capable of passing the maximum filtrate rates discharged from the filter press
filtrate connection. The tank shall be provided with an inlet and outlet connection, an overflow weir extending
from wall to wall within the tank between the inlet and outlet, and a liquid sensing device located on the inlet
side of the weir to transmit an electrical signal to the Dewatering System Control Panel when stable terminal
flow has been achieved. The tank shall have a capacity of [_____] and shall be constructed of [fiberglass reinforced
plastic] [coated steel] and shall include a hinged, vented cover.
2.5.9 Drip Trays
NOTE: Drip trays are optional features recommended for housekeeping purposes
when a filter media water washing system is used. If drip trays are not used
delete this paragraph.
Each of the cake storage bunkers shall be equipped with a set of bomb-bay type drip trays located in the floor
opening. The trays shall consist of two shelf sections to extend from the location of the follower, in its fully
extended position, to the tail stand of the filter, and shall be designed to convey water from the trays or from
washing operations into a launder. The top tray shall slightly overlap the lower center half at the center line
to yield a pitched surface when closed. Trays shall be hydraulically operated by means of a double acting hydraulic
cylinder. Power pack controls shall automatically interlock drip tray closure with opening and closing of this
press. In the fully closed position, the trays shall be mechanically locked; reliance on hydraulic pressure
to ensure full closure will not be acceptable. Limit switches shall be incorporated in the drip tray mechanism,
and interlocking shall be incorporated in the system design to ensure against accidental discharge of filter
cake when the doors are not in a fully open position. A manual override shall be provided for maintenance purposes.
The supporting frame for the drip trays shall be fabricated steel construction. The top surface of the trays
shall be [polypropylene] [304 stainless steel]. Each drip tray assembly shall be equipped with a launder extending
the length of that assembly. The launders shall be at least 150 mm 6 inches wide, shall be of [polypropylene]
[PVC] [304 stainless steel] construction with a minimum material thickness of 16 gauge, and shall terminate in
a [_____] mm inch flanged drain outlet.
2.5.10 Sludge Cake Handling and Storage
NOTE: Sludge cake storage and handling depends on the method of ultimate disposal,
such as direct discharge into a storage receptacle or conveying or pumping the
sludge cake for further processing.
2.5.10.1 Direct Discharge Systems
NOTE: The direct discharge system size depends on the size of the filter press
and required sludge cake storage capacity. This paragraph provides two direct
discharge system options: a drum system for smaller applications (210 L (55
gallon) drums) and a roll-off box system for larger applications (greater than
210 L (55 gallon) receptacle).
The direct disposal system shall be provided to support the filter press in such a manner and elevation that
filter cake discharged from the press is directly deposited into [[1] [_____] 210 L 55 gallon[drum] [drums]]
[[1] [_____] cubic meterscubic feet roll-off box] located beneath the press. The direct disposal system shall
consist of a platform and disposal [chute] [chutes] that shall direct the sludge cake discharged into the disposal
[drum] [drums] [roll-off box]. The platform shall include railing, catwalk, and stairs and shall conform to
the design requirements in AISI SG03-3. The platform shall be constructed as indicated to allow an operator
adequate access between all sides of the filter press and the safety railing and access to critical components
of the press not accessible from the floor. The platform deck and stair treads shall be fabricated of ASTM A 36/A 36M
carbon steel grating 25 mm by 5 mm 1 inch by 3/16 inch bars on 20 mm 13/16 inch centers and shall be constructed
so that deflection will not exceed 1/300 of the span, considering dead and live load requirements and applicable
safety factors. The platform frame shall be fabricated of ASTM A 36/A 36M structural steel I-beam, angle and
plate shall support all equipment loading plus applicable safety factors. The operator walkways shall have a
toe plate of carbon steel and safety rails of 25 mm 1 inch diameter schedule 80 carbon steel pipe. Stairs shall
conform to requirements listed in Section 05 50 13 MISCELLANEOUS METAL FABRICATIONS. Each disposal chute shall
be fabricated of 6 mm 1/4 inch thick ASTM A 36/A 36M carbon steel sheet and shall be attached to the platform
to limit spillage of sludge cake.
2.5.10.2 Sludge Cake Transport Systems
NOTE: A separate section to address conveying or pumping the sludge cake will
be prepared and referenced in this paragraph.
2.5.11 Blanking Plate
A blanking plate shall be provided which can be vertically inserted at any point in the plate stack to isolate
the filter plates between it and the follower head, allowing a partial load to be processed. A movable follower
liner which can move with the blanking plate shall be provided to allow filtration in the last cavity. The core
blow air line shall move with the blanking and follower plates.
2.5.12 Automatic Filter Media Water Washer Assembly
NOTE: The automatic filter media water washer assembly will be required only
if an automatic plate water wash system is used. If a manual system is used,
delete this paragraph.
Each of the filters shall be equipped with a fully automated filter media water washer assembly. The washer
shall be supported from the beam assembly of the filter and shall normally be stored between the filter follower
and tail stand. The washer shall be designed for operation with water at 10 MPa 1500 psig and shall be capable
of washing two plate sides at a time using one or multiple passes as required. Controls and appurtenances shall
be provided to allow the washer, once initial settings have been established, to wash each plate in a filter
without further operator attention.
2.6 CONTROL SYSTEM
NOTE: Control systems for filter press and dewatering systems are application
specific and can range from fully manual control to fully automatic control.
The level of control presented in this guide specification is based on a semiautomatic
control scheme. The semiautomatic control scheme involves manual operator startup
of the sludge dewatering system, automatic control during the filtration cycle,
and manual startup and shutdown of supporting sub-cycles such as filter media
washing. The filter press components are controlled by a Filter Press Control
Panel with control of the accessories by a Dewatering System Control Panel.
If more or less control is required the degree of control shall be specified
herein or shall be identified on the drawings.
If remote alarm and process variable monitoring is used, a separate paragraph
should be added to coordinate with remote systems, such as Supervisory Control
and Data Acquisition (SCADA) Systems and annunciators, and to include the method
of transmission to remote locations.
A [manual] [semiautomatic] [automatic] complete electrical power, control, and instrumentation system as specified
or recommended by the equipment manufacturer for the safe operation and supervision of the filter press units
and related equipment shall be provided, except those items specified to be furnished under other sections.
Schematics and interconnection wiring diagrams for power, control, instrumentation circuits shall be provided
to equipment specified. Terminal blocks (plus 25 percent spare terminals) shall be provided in panels to terminate
field and interconnection wiring. Control power transformers, relays, adjustable timers, auxiliary contacts,
switches, or additional equipment required to interconnect the filter press package equipment to a remote plant
monitoring system, and control circuits as shown on schematic or instrument control system drawings shall be
provided. Conduit and wiring between control panels and control devices shall be furnished.
2.6.1 Normal Operation
NOTE: Following are typical normal operation procedures for both the fixed-volume
and variable-volume filter presses. These operation procedures are provided
for equipment suppliers to design control systems which involve control of filter
press components by a Filter Press Control Panel and control of the accessories
by a Dewatering System Control Panel. If these procedures are provided on the
drawings, or are inapplicable, delete or revise appropriately.
2.6.1.1 Fixed Volume Operation
The normal operation of a fixed-volume recessed plate and frame press will consist of the following sequence:
a. The operator shall close filter press with controls at the press.
b. The drip trays shall be closed from Filter Press Control Panel.
c. The operator shall manually close valves to filtrate weir tank and valves to slurry feed pump.
d. The operator shall manually open valves for precoat recycle to filtrate storage tank, precoat tank
to pump, and precoat pump to press.
e. The operator shall start the precoat pumps from the Dewatering System Control Panel.
f. The precoat system shall operate long enough to complete three cycles through the press while recycling
back to the precoat tank.
g. The operator shall manually open valve from sludge conditioning tank to slurry feed pump.
h. The operator shall start the slurry feed pumps from the Dewatering System Control Panel.
i. The operator shall close valve from precoat pump to press while simultaneously opening valve from
slurry feed pump to the press.
j. The operator shall close precoat recycle valve and open valve to filtrate weir tank.
k. The filter press feed pumping unit shall be operated as recommended by filter press supplier or as
indicated.
l. The filter press shall operate until it is automatically shut down by high filter press inlet pressure,
terminal filtrate weir tank flow rate, low level in the sludge conditioning tank, or any additional process
or safety related shutdowns recommended by the filter press supplier or as indicated.
m. After the filter press feed pumping unit is shut off, there shall be a [1] [2] [_____] minute delay
before the control system shall automatically: (1) close the filtrate pipe valve, (2) open the valves
on the filter press feed line to air/core blowdown tank and open the air supply valve to the air/core
blowdown tank, and (3) at completion of air/core blowdown, reposition valves on the filter press feed
line to the filter feed position.
n. After air/core blowdown, the completed filtering operation shall be indicated on the Filter Press
Control Panel. The operator shall then open the filter press and initiate plate shifting and discharging
of sludge cake from the Filter Press Control Panel.
o. The drip trays shall be interlocked with the sludge discharge operation and shall provide an enable/disable
interlock for press opening. Internal filter press pressure in the feed port shall not allow press opening.
p. The plate shifter shall automatically move plates at an adjustable delay of [5 to 10] [_____] seconds
between shifts. A trigger control station located at the filter press shall allow interruption of the
plate shifting process. The plate shifting process must be reinitiated from the Filter Press Control
Panel. When each plate has been shifted the closing mechanism shall remain in the open position until
the next press cycle is initiated.
2.6.1.2 Variable Volume Operation
The normal operation of a variable volume (diaphragm) recessed plate and frame filter press will consist of the
following sequence:
a. The operator shall close filter press with controls at the press.
b. The drip trays shall be closed from Filter Press Control Panel.
c. The operator shall manually close valves to filtrate weir tank and valves to slurry feed pump.
d. The operator shall manually open valves for precoat recycle to filtrate storage tank, precoat tank
to pump, and precoat pump to press.
e. The operator shall start the precoat pumps from the Dewatering System Control Panel.
f. The precoat system shall operate long enough to complete three cycles through the press while recycling
back to the precoat tank.
g. The operator shall manually open valve from sludge conditioning tank to slurry feed pump.
h. The operator shall start the slurry feed pumps from the Dewatering System Control Panel.
i. The operator shall close valve from precoat pump to press while simultaneously opening valve from
slurry feed pump to the press.
j. The operator shall close precoat recycle valve and open valve to filtrate weir tank.
k. The filter press feed pumps shall run until an initial fill cycle has been completed.
l. After the initial fill cycle is completed the valves to the filter press feed pumps shall close and
the pumps shall shut down.
m. The valves to the diaphragm [water] [air] filling system shall open and the [water] [air] shall be
slowly pumped behind the diaphragms causing them to expand and compress the sludge cake.
n. The diaphragm system shall operate at the maximum diaphragm pressure until the filter press is automatically
shutdown by an elapsed compression time, terminal filtrate weir tank flow rate, low level in the sludge
conditioning tank, or any additional process or safety related shutdowns recommended by the filter press
supplier or as indicated.
o. The [water] [air] diaphragm system shall then be depressurized.
p. After the filter press diaphragm is depressurized, there shall be a [1] [2] [_____] minute delay
before the system will automatically: (1) close the filtrate pipe valve, (2) open the valves on the
filter press feed line to air/core blowdown tank and open the air supply valve to the air/core blowdown
tank, and (3) at completion of air/core blowdown, reposition valves on the filter press feed line to
the filter feed position.
q. After air/core blowdown, the completed filtering operation shall be indicated on the Filter Press
Control Panel. The operator shall open the filter press and initiate plate shifting and discharging
of sludge cake from the Filter Press Control Panel.
r. The drip trays shall be interlocked with the sludge discharge operation and shall provide an enable/disable
interlock for press opening. Internal filter press pressure in the feed port or diaphragm system shall
not allow press opening.
s. The plate shifter shall automatically move plates at an adjustable delay of [5 to 10] [_____] seconds
between shifts. A trigger control station located at the filter press shall allow interruption of the
plate shifting process. The plate shifting process shall be reinitiated from the Filter Press Control
Panel. When each plate has been shifted the closing mechanism shall remain in the open position until
the next press cycle is initiated.
2.6.2 Filter Media Water Wash Operation
NOTE: The filter media water wash operation can be performed either automatically
or manually. This paragraph only provides requirements for the automatic operation
and will be deleted when a manually operated system.
Filter media water washing will be provided on an as required basis and will consist of the following sequence:
a. The operator shall open the filter press.
b. Drip trays shall be closed from the Filter Press Control Panel to collect the wash water.
c. From the Dewatering System Control Panel the sequence shall be initiated to automatically index through
the entire plate stack or an isolated plate until each plate has been washed.
d. Plates shall be shifted and washed at the rate of one plate per [1] [_____] minute.
e. Operation of the filter press shall be unimpeded by the washer in the parked position.
f. The washer shall automatically return to the cylinder end of the plate stack after wash cycle is
complete.
g. After the last plate is washed the filter media water wash system shall automatically shutdown.
h. In manual mode the filter media water wash pump shall be started from a local hand switch.
2.6.3 Acid Wash Operation
NOTE: An acid wash system is only required when lime conditioning is used.
If this system is not used, delete this paragraph.
The acid wash system shall be controlled from the Dewatering System Control Panel. The Dewatering System Control
Panel shall have an acid wash local/remote switch and on/off pushbuttons for each filter press. The local/remote
switch shall be in the local position, disable the on/off pushbuttons on the Dewatering System Control Panel,
and enable the local on/off switch. In the remote position the on/off pushbuttons on the Dewatering System Control
Panel are enabled and the local on/off switch is disabled. The acid wash operation shall be initiated and terminated
manually. The local on/off push button shall be provided for maintenance purposes. The acid wash pump shall
not be allowed to start or continue to operate once started unless the Dewatering System Control Panel indicates
the following conditions have been met:
a. Drip trays closed.
b. Closing mechanism closed.
c. Appropriate filtrate drain valves open/closed.
d. Filter press feed valve in closed position.
e. Core blow air valves closed.
2.6.4 Filter Press Control Panel
NOTE: The control of filter press components will be provided by a Filter Press
Control Panel. If more or less control is required the degree of control will
be specified herein or identified on the drawings.
Each filter press unit shall be provided with a control panel mounted on or near the unit to monitor and control
pneumatic and hydraulic press parameters during shutdown and maintenance. The panel shall be prewired to the
associated press components. The press control panel shall also include, but not be limited to, the following
items:
a. A [handrail] [unit] [floor] mounted NEMA [4X] [4] Control Panel with front accessible door.
b. Air supply pressure gauge and control.
c. Hydraulic supply to press cylinder gauge and control.
d. Hydraulic supply to drip tray gauge and control.
e. Hydraulic supply to plate shifter gauge and control.
f. Open-close drip trays.
g. Open-close plate follower.
h. Start-Stop plate shifter.
i. Precoat cycle ON/OFF indication and control.
j. Filter media washer ON/OFF indication and control.
k. Air blowdown and core blow cycle indication, including destination of the air and core blown sludge.
2.6.5 Dewatering System Control Panel
NOTE: The control of accessories to the filter press sludge dewatering system
shall be provided by a Dewatering System Control Panel. If more or less control
is required the degree of control will be specified herein and identified on
the drawings.
Each filter press shall be provided with a remotely mounted running and operating control panel as indicated
on the drawings. The control panel shall house electrical equipment and accessory items required in the operation
of the dewatering equipment as specified. The dewatering system control panel shall include, but not be limited
to, the following items:
a. A [handrail] [unit] [floor] mounted NEMA [4] [4X] enclosure with front access door and nameplate.
b. ON-OFF selector switch for each press.
c. A push-pull emergency shutdown push button for each filtration system treatment trains.
d. Off-Auto selector and start push button shall be furnished for each of the following cycles: filtration
cycle, [precoat cycle with timer controls,] [air and core blowdown cycles with timer controls,] [automatic
filter media water wash cycle,] [manually operated acid wash cycle].
e. Pump Controls. Local/remote selector switch and lighted Start-Stop push buttons for the acid wash
pump. H-O-A selector switch and lighted Start-Stop push buttons for each filter press feed pump [, filter
precoat system feed pump,] [and the filter media water wash pump]. Selection control and operating status
of filter press feed pumps.
f. Valve Controls. Lighted push button controls shall be furnished for each core blow compressed air
valve and three way filter feed pump discharge valve. Lighted OPEN-CLOSE push-button controls shall
be furnished for each of the filtrate top drain and the filtrate bottom drain.
g. Limit switches on each valve shall indicate position on the Dewatering System Control Panel. Switches
shall be NEMA 9 or shall be intrinsically safe devices.
h. Alarms. A filter press filtrate terminal flow switch and a filter press inlet high pressure switch
shall be furnished with the filter press package and shall be input to the Dewatering System Control
Panel. Either of the conditions shall shut down filter press operation. The filter press feed pumps
indicating lights for "low hydraulic pressure" and "end of cycle" due to a full filter press shall be
provided on the Dewatering System Control Panel.
i. Outputs. Isolated dry contact closures shall be furnished for the following remote indications:
filter press run status, press equipment malfunction alarm, press feed pump run status.
2.6.6 Power and Instrumentation/Control Signals
A separate electrical power supply to each Filter Press Control Panel as indicated shall be 480 volts, 60 Hz,
[20] [_____] amps, three-phase service. The filter press manufacturer shall provide circuit disconnect, protective
motor starting, control and step down power transformers, and power and control circuits required for complete
operation of the filter press regardless of whether or not they are specified or shown on the drawings. The
electrical power supply to the Dewatering System Control Panel as indicated shall be unregulated 120 volts ac,
20 amps, single phase service. Transmitted electronic analog instrument signals shall be 4 to 20 mA dc, unless
noted otherwise, and shall be linear with the measured variable. Pneumatic analog instrument signals shall be
20 to 100 kPa 3 to 15 psig. Control and instrument system installations shall conform to applicable requirements
of Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM. An integral 24 volt dc power supply shall be provided as required
in the Dewatering System Control Panel for operating instrumentation circuits.
2.6.7 Metering Accuracy
System metering accuracy, as compared to the actual process value, shall be determined from the value read at
the principal readout device such as the recorder or totalizer. System requirements shall not preclude any requirements
specified herein for individual devices. For systems where the primary measuring device, transmitter, and receiver
are furnished under this section, the accuracies shall be within the following limits:
a. Pressure: 1.0 percent of measured span.
b. Level: 1.0 percent of measured span.
c. Temperature: 1.0 percent of measured span.
d. Position: 2.0 percent of maximum travel.
2.6.8 Appurtenances
Signal converters, signal boosters, amplifiers, special power supplies, special cable, special grounding, and
isolation requirements shall be furnished and installed as required for proper performance of the equipment.
2.6.9 Interchangeability and Appearance
Instruments utilized for the same types of functions and services shall be of the same brand and model line insofar
as practicable. Similar components of different new and existing instruments shall be from the same manufacturer
to facilitate maintenance and stocking of repair parts. Whenever practical, identical units shall be furnished.
Recorders, process indicators, control stations, and similar panel-mounted instruments shall be of the same style
and shall be products of the same major instrument manufacturer.
2.6.10 Programming Devices
Programming or system configuring devices, such as hand held programmers and calibrators, shall be provided when
required for routine maintenance and troubleshooting of the equipment.
2.6.11 Device Tagging
Devices shall be provided with permanent identification tags. The tag numbers shall agree with the construction
drawings and with the supplier's equipment drawings. Stamped stainless steel or engraved plastic tags shall
be provided. Hand lettered labels or tape labels are not acceptable.
2.6.12 Panel Fabrication
Controls shall be enclosed in NEMA [4] [4X] control panels. Electrical components shall be prewired and factory
tested to the maximum extent possible. The following paragraphs describe general fabrication requirements for
panels, consoles, enclosures, and subpanels:
a. Piping. Pneumatic tubing shall be not less than 6 mm 1/4 inch OD copper with compression fittings.
Tubing and fittings shall be specified in Section 22 00 00 PLUMBING, GENERAL PURPOSE. Tubing shall be
run in horizontal and vertical planes, rigidly supported to withstand handling and shipment. Flexible
polyethylene tubing shall be used to connect devices mounted on hinged doors. Compression type bulkhead
fittings shall be provided near the bottom or top of the panel for field connections. Compression nuts
and sleeves shall be provided for the field connections. Indicators, recorders, controllers, and other
pneumatic devices shall be provided with plugged test connections and shutoff valves for isolation.
Devices shall have separate air supply shutoff valves. Pneumatic instrument panels shall be arranged
to be served from a looped air supply header which is common to the panels. A three-valve manifold shall
be provided in each instrument panel so that: (1) the looped air supply header may be sectionalized,
(2) the panel may be served from either or both sides of the looped header supply, and (3) the looped
air supply header may remain open with the supply to the panel shutoff. Power and control air requirements
for the pneumatic instruments and devices on, within, and in conjunction with the instrument panel shall
be supplied from the panel side of the respective three-valve manifold. Dual pressure regulators shall
be provided on each instrument panel for each power or control pressure level and shall be provided with
blocking and shutoff valves so that either may be taken out of service without interrupting the service
of the other. The regulators shall be connected to valve header manifolds and arranged to supply each
individual pneumatic system through separate lines which branch off and can be isolated with blocking
valves so that each system may be isolated and taken out of service independently of another. A bar
type bulkhead shall be provided for termination of field piping and shall also provide threaded "T" taps
that are plugged but which can be used for connection of test gauges during service and maintenance.
Relief valves shall be provided for protection of instruments from high pressure in case of regulator
failure. Regulators shall be provided with input and output pressure gauges and with filters and moisture
traps.
b. Wiring. Standard power and control wiring shall be provided in conformance with Section
26 20 00 INTERIOR DISTRIBUTION SYSTEM and analog control wiring shall follow the requirements within
this paragraph. Analog circuits shall be routed in dedicated raceway systems. Terminal blocks for external
connections shall be suitable for No. 12 AWG wire, and shall be rated 30 amperes at not less than 600
volts. Terminal blocks shall be fabricated complete with marking strip, cover, and pressure connectors.
Terminals shall be labeled to agree with identification shown on the supplier's submittal drawings.
A terminal shall be provided for each conductor of external circuits plus one ground for each shielded
cable. Wiring shall be grouped or cabled and firmly supported to the panel. Not less than 200 mm 8
inches of clearance shall be provided between the terminal strips and the base of vertical panels for
conduit and wiring space. Not less than 25 percent spare terminals shall be provided. Each control
loop or system shall be individually fused, and fuses or circuit breakers shall be clearly labeled and
located for easy maintenance. The panel fabricator shall provide such additional circuits as may be
indicated on or required by the electrical drawings.
c. Nameplates. Nameplates shall be provided on the face of each panel and on each individual device
as required. Panel nameplates shall have approximate dimensions and legends as indicated and shall be
made of laminated phenolic material having engraved letters approximately 5 mm 3/16 inch high extending
through the black face into the white layer. Nameplates shall be secured firmly to the panels.
d. Painting. Panels shall painted in accordance with requirements provided in paragraph PAINTING.
2.6.13 Controls and Interfaces
The filter press shall be controlled and operated with accessories and auxiliary systems, filter press pumps,
[sludge conditioning system,] [precoat system,] filter media water wash system, [acid wash system,] [membrane
water inflation system], and compressed air system, as one system, as indicated and specified. Filter feed pump,
filter press, and valve interlocking relays, timers, and controls shall be provided as required on drawings or
as specified.
2.6.14 Alarms
The unit shall be deactivated automatically if a loss of hydraulic pressure is sensed in the filter press. Alarm
circuits and fail-safe controls shall be provided to alert the operator of any press equipment malfunction and
shut down the press and auxiliaries, light an alarm light and sound an alarm horn on the Dewatering System Control
Panel. A normally open contact which closes under an alarm condition shall be provided for this annunciation.
Operation of each filter press system shall be indicated by continuously illuminated lights on the front of the
filter press control panels. The alarm circuits shall be reset by an "Alarm-Reset" push button on the front
of the Dewatering System control panel.
2.7 SPARE PARTS
The following spare parts shall be provided with each filter press unit: one complete set of filter media cloth;
two plates; two complete sets of each type of bearings and bushings, exclusive of those contained in motors and
gear drives; one complete set of seals; two fuses of each type and size used; two light bulbs of each size used,
including annunciator; and any other parts considered as "high wear" items unique to the filter press furnished.
Spare parts shall be provided in waterproof packages suitable for export service labeled with the description
and part numbers. Except for fuses and light bulbs, each item or set of parts expected to be installed at one
time shall be in an individual package.
2.8 SAFETY MECHANISMS
NOTE: Safety mechanisms are optional features that are recommended for semiautomatically
or automatically operated press applications. Light curtain or safety pullwires
primarily preform the same function, thus both features are not required for
the same application.
2.8.1 Light Curtain
NOTE: The light curtain shall extend over the minimum length of the horizontal
edge of the filter plates.
A light curtain presence sensing device shall be factory mounted to control the complete operation of the filter
press. Light curtains shall be furnished for both sides of the filter providing an operator safety depth of
[_____]. The light curtain shall consist of an [infrared] [visible spectrum] light source transmitter array,
a photo transistor receiver array, and a solid state multiplexed controller with electro-mechanical output relay.
The light sources shall be mounted in a reflective housing and shall be equipped with a high quality optical
lens to properly collimate the emitted light. The receivers shall be mounted in a sealed housing equipped with
a glass optical converging lens. The control system shall have a time delay function, adjustable from 0.025
to 5 seconds, which shall continue to de-energize the electronic output for the specified time period after the
curtain has been interrupted and then restored.
2.8.2 Safety Pullwires
A double set of shifter or follower movement safety stop lanyards shall be provided on both sides of the filter
press for personnel protection. This system shall consist of steel cables and supports with manually reset safety
switches on both sides of the press. The system shall provide control contacts to interrupt service until the
switch is reset by hand. Switches shall be NEMA 4 enclosures.
2.8.3 Safety Guards
A safety guard shall be mounted on the non-operator side or side opposite from the plate shifter control station
of the filter press. The safety guard shall consist of a metal screen or acrylic safety screen. The safety
guard shall be equal height to the filter plates and shall run the length of the press.
2.9 FILTER PRESS INSTALLATION EQUIPMENT
An overhead [bridge crane] [monorail] [hoist] shall be provided in accordance with the requirements of Section
[41 22 13.13 BRIDGE CRANES][41 22 23.19 MONORAIL HOISTS].
2.10 ACCESSORIES
2.10.1 Filter Press Feed Pumps
NOTE: Several types of pumps, including plunger, progressive cavity, and diaphragm
pumps, may be applicable for filter press feed applications. Information on
these types of pumps is presented in Section 44 46 00 PUMPS; SEWAGE AND SLUDGE.
Each filter press sludge feed pump shall be a [plunger] [progressive cavity] [diaphragm] type. Each pump shall
be completely factory assembled, that is, parts required to operate the pump shall be mounted on a base plate.
Pump and drive unit shall be designed for continuous 24 hour per day operation. The specific requirements for
this type of pump and associated accessories are provided in Section 44 46 00 PUMPS; SEWAGE AND SLUDGE.
2.10.2 Sludge Conditioning System
NOTE: The sludge conditioning system may be applicable for some applications
to increase filterability. If conditioning is not required, delete this paragraph.
A sludge conditioning system shall be supplied consisting of a mixing tank, an air blowdown manifold and sludge
receiving tank, and associated valves, appurtenances, and controls.
2.10.2.1 Sludge Conditioning Tank
The sludge conditioning tank shall have a useful capacity of [_____] and be constructed of [fiberglass reinforced
plastic (FRP)] [coated steel]. The tank shall be flat bottom, closed flanged top type approximately [_____]
diameter and [_____] high. In addition to the tank useful capacity, 300 mm 12 inch extra of sidewall height
for pump cut off controls and 300 mm 12 inch extra of sidewall height for freeboard shall be allowed. The tank
shall include flanged fittings for drain, sludge outlet, 600 mm 24 inchmanway in the shell, sludge inlet, conditioning
agent inlets, [core blow tank connection,] vent connection, level switches, mixer mounting flange in the top,
and access ladder and platform for top access.
2.10.2.2 Sludge Conditioning Tank Mixer
The sludge conditioning tank mixer shall mix the conditioning tank contents prior to feeding the filter press.
The mixer agitator shall be complete with [_____] watt hp motor. [_____] turbine type mixing elements shall
each be supplied with [_____] pitch blades.
2.10.2.3 Air Blowdown\Core Blow Sludge Separation Tank
NOTE: The air blowdown\core blow sludge separation tank is only required if
those optional features are used.
An air blowdown and core blow sludge separation tank shall be provided to dissipate, by centrifugal action, the
energy of the sludge discharged under pressure from the air blowdown and/or core blow operations performed at
the end of the dewatering cycle. This tank shall be a cylindrical separator type tank fabricated of coated steel
with an overall length of [_____] and diameter of [_____]. This tank shall be mounted on top of the sludge conditioning
tank.
2.10.2.4 Chemical Feed System
NOTE: Each type of chemical feed system required for sludge conditioning is
application specific. Requirements for several types of liquid chemical feed
systems typically required for sludge conditioning are provided in Section
43 32 69 CHEMICAL FEED SYSTEMS. Requirements for any additional types of chemical
feed systems will also be added to that section.
Chemical feed systems required for sludge conditioning shall be provided in accordance with requirements in Section
43 32 69 CHEMICAL FEED SYSTEMS.
2.11 PRECOAT SYSTEM
NOTE: A precoat system may not be required for every application. If inapplicable
this paragraph shall be deleted.
A precoat system shall provide material to precoat the filter media. The precoat system shall consist of a precoat
tank with mixing, precoat pump, chemical feed system, associated valves, appurtenances, and controls.
2.11.1 Precoat Tank
The sludge precoat tank shall have a useful capacity of [_____] and be fabricated of [coated steel] [stainless
steel]. The tank shall be flat bottom, closed flanged top type approximately [_____] diameter and [_____] high.
In addition to the tank useful capacity 300 mm 12 inch extra in sidewall height for pump cut off controls and
300 mm 12 inch extra in sidewall height for freeboard shall be allowed. The tank shall include flanged fittings
for drain, precoat outlet, future connection for precoat material inlet, filtrate water inlet level switches
as shown on the construction drawings, mixer mounting flange in the top, and an access ladder and platform for
top access.
2.11.2 Precoat Tank Mixer
The precoat tank mixer shall mix the tank contents to feed the filter press. The agitator shall be complete
with [_____] watt hp motor. [_____] turbine type mixing elements shall each be supplied with [_____] pitch blades.
2.11.3 Precoat Feed Pump
NOTE: Several types of pumps, including centrifugal and diaphragm pumps, may
be used for precoat feeding depending on the type of precoat material used.
Information on these types of pumps is presented in Section 44 46 00 PUMPS,
SEWAGE AND SLUDGE.
Each precoat pump shall be a [centrifugal] [diaphragm] type. Each pump shall be factory assembled, that is,
parts required to operate the pump shall be mounted on a base plate. Pump and drive unit shall be designed for
continuous 24 hour per day operation. The specific requirements for this type of pump and associated accessories
are provided in Section 44 46 00 PUMPS, SEWAGE AND SLUDGE.
2.11.4 Chemical Feed
NOTE: The type of dry or bulk chemical feed system required will be application
specific. Requirements for the dry chemical feed system will be provided in
a separate guide specification and referenced in this paragraph.
2.11.5 Compressed Air System
NOTE: The compressed air system described in this paragraph contains equipment
for both instrument and plant systems applications. Edit as necessary.
Compressed oil free, dry instrument air is to be supplied at [690 kPa 100 psi] [[_____] kPa psi] and process
air is to be supplied at [690 kPa 100 psi] [1550 kPa 225 psi] [[_____] kPa psi]. The air compressor system shall
consist of air compressors, an air dryer, instrument air receiver, and a membrane inflation and core blow air
receiver.
2.11.5.1 Air Compressors
[Two] [_____] duplex air compressors shall be supplied with the filter press. The air compressors used for the
filter press system shall be in accordance with air compressor requirements provided in drawings and in Section
22 00 00 PLUMBING GENERAL PURPOSE.
2.11.5.2 Compressed Air Dryer
A refrigerated type compressed air dryer shall be installed between the compressor aftercoolers/separators and
the instrument air receiver. The dryer shall have a minimum operating capacity of [_____] L/s cfm at a pressure
of 690 kPa 100 psig. The electrical characteristics of the dryer shall be [_____] watt hp, 208 volts, three
phase, 60 Hertz. An adjustable air pressure regulator shall be installed upstream of the air dryer. The regulator
shall be capable of handling a maximum inlet pressure of 2.1 MPa 300 psig, have an adjustable range of [_____]
to [_____] kPa [_____] to [_____] psig, with a maximum operating temperature of 80 degrees C 175 degrees F and
be provided in accordance with any additional applicable requirements in Section 22 00 00 PLUMBING, GENERAL PURPOSE.
2.11.5.3 Instrument Air Receiver
The instrument air receiver shall store air as delivered from the air dryer. The instrument air receiver used
shall be provided in accordance with the air receiver requirements provided in drawings and in Section
22 00 00 PLUMBING, GENERAL PURPOSE.
2.11.5.4 Core Blow and Membrane Inflation Air Receiver
NOTE: This receiver will only be required for filter press systems using air
or core blowing systems or variable volume filter presses requiring diaphragm
inflation. This receiver shall be designed with 1720 kPa (250 psi) working
pressure which is greater than the 1380 kPa (200 psi) pressure referred to in
Section 22 00 00 PLUMBING, GENERAL PURPOSE.
The air receiver shall store air as delivered from the compressor aftercooler. The core blow and membrane inflation
air receiver used shall be provided in accordance with the air receiver requirements provided in drawings and
in Section 22 00 00 PLUMBING, GENERAL PURPOSE.
2.11.6 Membrane Water Inflation System
NOTE: This system will only be required if a variable volume filter press using
a membrane water system is used.
The membrane water inflation system for the variable volume filter press application shall consist of a pump,
tank, and appurtenances.
2.11.6.1 Membrane Water Inflation Pump
NOTE: Several types of pumps, including centrifugal, progressive cavity, and
diaphragm pumps, may be applicable for membrane water inflation. Information
on the applicability and detailed requirements for these types of pumps are
presented in Section 44 46 00 PUMPS; SEWAGE AND SLUDGE.
Each membrane water inflation pump shall be a [centrifugal] [air diaphragm] [progressive cavity] type. This
type of pump and associated accessories shall be provided in accordance with requirements in Section
44 46 00 PUMPS; SEWAGE AND SLUDGE.
2.11.6.2 Membrane Water Tank
NOTE: If the water is recycled to the filter media water wash tank this paragraph
shall be deleted.
The membrane water tank shall have a useful capacity of [_____] and shall be constructed of [polypropylene] [polyethylene]
[fiberglass reinforced plastic]. The tank shall be flat bottom, open flanged top type approximately [_____]
diameter. The tank shall also be provided with a tubular glass gauge assembly and level controls.
2.11.7 Filter Media Water Wash System
NOTE: Filter media water washing can be performed either manually or automatically.
Both types of systems are described in this paragraph. Any equipment not required
shall be deleted.
[A manual filter media water wash system shall be provided having 6.9 MPa 1000 psig discharge nozzle pressure
to periodically clean the filter media. The wash system shall be cart mounted with sufficient length of hose
and power cord. The washer shall consist of a hand held wand with a single fan type nozzle. Washer control
shall be contained in the washer cart. The pump shall be powered by a 760 watt 10 hp totally enclosed fan cooled
motor mounted on the pump cart.] [An automatic filter media water wash system shall be supplied consisting of
a tank, pump, and appurtenances. The system shall provide high pressure water at 10.3 MPa 1500 psig to the filter
media water washer assembly.]
2.11.7.1 Filter Media Water Wash Tank
NOTE: If an automatic wash system is not used this paragraph shall be deleted.
The filter media water wash tank shall have a useful capacity of [_____] and be constructed of [polypropylene]
[fiberglass reinforced plastic]. The tank shall be flat bottom, open flanged top type approximately [_____]
diameter. The tank shall also be equipped with a tubular glass level gauge assembly.
2.11.7.2 Filter Media Water Wash Pump
NOTE: If an automatic wash system is used, the specific requirements listed
in this paragraph shall be coordinated or incorporated into Section
44 46 00 PUMPS; SEWAGE AND SLUDGE, as required. If an automatic wash system
is not used this paragraph will be deleted.
The plate water wash pump shall be a triplex reciprocating, horizontal piston pump. The pump shall be factory
assembled; that is, parts required to operate the pump shall be mounted on a common base plate. The pump shall
be rated for a flow of [_____] and a discharge pressure of [_____].
a. Drive Unit. The pump shall be driven by an electric motor. The motor shall be [_____] watt hp,
three phase, 60 Hz, 480 Volt, totally enclosed fan cooled, Class F Insulation, Severe Duty Construction.
The motor short circuit protective device and magnetic starter shall be remotely located in a motor control
center as shown on the drawings. A local disconnect shall be provided at the motor. The motor shall
be directly coupled to the gear reduction unit. The coupling shall be flexible and shall be covered
with a guard. The pump shall be equipped with an internal, single reduction gear. Moving gear parts
shall be splash lubricated and shall not require any external force lubrication system. The entire gear
mechanism shall be totally enclosed and effectively sealed so that dirt or water cannot enter. It shall
have an oil sight glass, an oil filling opening and an oil outlet. The pump gear wheel speed shall not
exceed 400 rpm. The pinion gear and gear wheels shall be helical type operating in an oil bath. The
pump pinion shaft shall be of high strength hardened steel. The pump shall run in sealed anti-friction
bearings to prevent oil leakage.
b. Pumping Unit. Each piston shall be stainless steel with two neoprene U ring seals forming an effective
seal with the inside surface of the cylinder liner. The piston shall run in a replaceable stainless
steel cylinder liner.
c. Piping, Valves, and Miscellaneous. The suction and discharge valve shall be housed in a compact,
double valve cartridge for easy inspection and replacement. Valves shall be spring loaded plate type
in one piece assembly. The valve seats and valve plates shall be hardened stainless steel. The suction
and discharge side valve components shall be interchangeable. The pump shall be equipped with a spring
loaded discharge pressure relief valve to protect the pump and system from over pressure. The pump shall
have a 19 mm 3/4 inch connection and shall be set for 10.7 MPa 1550 psig. The pump shall be equipped
with a liquid filled pressure gauge with an isolation valve. The pump shall have a nitrogen prefilled,
bladder type pulsation dampener connected to the discharge side of the pump. The pump shall be mounted
on rubber vibration isolation pads and connected to the suction piping with a rubber spool piece. The
pump shall be fitted with a fine mesh suction strainer with an exchangeable filter element. The discharge
of the pump shall be equipped with a solenoid operated three/two-way bypass valve with a bypass line
going directly back to the suction side of the pump. The three/two-way valve shall be spring loaded
such that pumpage is directed to the pump suction, unless the solenoid is energized. A loss of power
shall cause the three/two way valve to direct pumpage to the pump suction with no back pressure. The
pump shall be equipped with a 0.9 meter 3 foot long flexible, high pressure discharge hose and a 38 mm
1-1/2 inch ASME B16.5 Class 600 discharge flange.
d. Materials of Construction. Materials of construction shall consist of:
1) Gear Housing: Cast Iron
2) Crankshaft/Gear Wheels: Ductile Cast Iron
3) Pinion Gear Shaft/Piston: Hardened Steel
4) Pump Body: Ductile Cast Iron
5) Piston: Stainless Steel w/ U ring seals
6) Piston Liner: Stainless Steel
7) 3/2 Way Valve: Steel
8) Pump Base: Fabricated Steel
9) Valve Seats and Plates: Stainless Steel
2.11.8 Acid Wash System
NOTE: Acid wash systems are required only when lime conditioning is used.
If this system is not required, delete this paragraph.
An acid wash system shall consist of a drum pump, mixing tank, mixer, and transfer pump that will provide a dilute
acid for filter-media cleaning.
2.11.8.1 Acid Storage System
NOTE: Acid storage is provided in its original shipping container. If a different
acid storage system is used, revise the following requirements appropriately.
Acid shall be stored in its original shipping container.
2.11.8.2 Acid Transfer Pump
NOTE: Acid pumping for preparation of the acid wash solution is performed by
an acid drum pump. If a different pumping system is used, revise the following
requirements appropriately.
Transfer of [38] [_____] percent hydrochloric acid from shipping drums to the acid wash mixing tank shall be
provided by a drum pump. The pump tube shall be fabricated of polyvinyl chloride or other compatible non-metallic
material, and shall be 1200 mm 47 inches long and designed to fit through the bung of a standard shipping drum.
The pump shall have a capacity of approximately [_____] at [_____] of head. The drive motor shall be rated [_____]
watts hp, 115 volts, single phase, 60 Hz. An integral circuit breaker with manual reset, and an "On-Off" switch
shall be mounted in the pump handle. A [_____] long cord with 3 prong plug shall be included. The pump shall
have a 25 mm 1 inch, barbed discharge port for a hose connection. A wall mounting storage bracket and a chemical-resistant
drip pan shall be included. The dedicated circuit shall terminate in a dedicated receptacle near the drum location.
2.11.8.3 Acid Wash Tank
The acid wash tank shall be furnished to dilute, mix and hold acid for filter media washing. The tank shall
have a useful capacity of [_____] and be constructed of fiberglass reinforced plastic. The tank shall have [_____]
diameter conical bottom with supporting legs. The tank shall include flanged fittings for water inlet, acid
outlet, acid recirculation, overflow and drain and shall be provided with an access.
2.11.8.4 Acid Wash Tank Mixer
The mixer shall be suitable for continuous operation and shall be driven by a [_____] watt hp, 115 volt, single
phase, 60 Hz, totally enclosed fan cooled electric motor. The rotating speed of the mixer shall not exceed 1,750
rpm. The mixer shall be located to provide thorough mixing. The mixer shaft and impellers shall be fabricated
of corrosion resistant materials.
2.11.8.5 Acid Wash Pump
NOTE: The specified materials of construction for wetted parts of this pump
referenced in Section 43 21 13 PUMPS WATER CENTRIFUGAL will be polypropylene
or other suitable non-metallic material.
The acid wash pump shall be furnished to circulate dilute acid through the filter press. The horizontal end
suction centrifugal pump shall be provided in accordance with the requirements provided in Section 43 21 13PUMPS:
WATER, CENTRIFUGAL.
2.12 LUBRICATION
An adequate means of lubrication shall be provided for moving parts subject to wear. Except as otherwise specified,
lubrication shall be by grease or oil. Grease fittings shall be provided for grease-type bearings. If bearings
are not easily accessible, grease tubing shall be provided in a convenient location. Bearings shall be provided
with relief ports to prevent build up of pressures which might damage the bearings or seals. Oil reservoirs
shall be liberal in size and shall be provided with an opening for filling, an overflow opening at the proper
location to prevent overfilling, and a drain opening at the lowest joint. Reservoirs shall be properly vented
to prevent pressure build up.
2.13 FACTORY TESTS
Factory tests shall include tank integrity testing, process piping pressure/leak testing, accessory operability
testing, and control panel testing. The factory tests shall be performed and the results submitted to the Contracting
Officer prior to final approval of the equipment.
2.13.1 Tank Integrity Testing
Tank integrity (hydrostatic) tests shall include, but not be limited to, filling the tanks with potable water
for a period of 24 hours and inspecting for leaks.
2.13.2 Process Piping Pressure/Leak Testing
Process piping pressure and leakage testing shall include, but be not limited to, pipe testing for at least 1
hour with no loss of pressure except to compressed air plastic piping, unless recommended by the manufacturer,
at 1.5 times the working pressure, but not less than 350 kPa 50 psi with the intended service media.
2.13.3 Accessory Operability Testing
Accessory operability tests shall be performed for the filter feed pump system, [sludge conditioning tank system,]
[acid wash system,] filter media water wash system, and air compressor system.
2.13.4 Control Panel Testing
Control panel testing shall be performed by functional tests.
PART 3 EXECUTION
3.1 EXAMINATION
After becoming familiar with all details of the work, verify dimensions in the field, and advise the Contracting
Officer of any discrepancy before performing the work.
3.2 SLUDGE DEWATERING EQUIPMENT INSTALLATION
Install reinforced concrete, of the size and design indicated, in accordance with Section 03 31 00.00 10 CAST-IN-PLACE
STRUCTURAL CONCRETE.
3.2.1 Welding
Steel piping shall be welded in accordance with AWS D1.1/D1.1M by welders certified to have passed tests using
procedures in accordance with AWS B2.1 or ASME BPVC SEC IX. Welding procedures qualified by others, and welders
and welding operators qualified by another employer may be accepted as permitted by ASME B31.1. The Contracting
Officer shall be notified 24 hours in advance of tests and the tests shall be performed at the work site if practicable.
Structural members shall be welded in accordance with Section 05 05 23 WELDING, STRUCTURAL. Welding and nondestructive
testing procedures are specified in Section 43 02 00 WELDING PRESSURE PIPING.
3.2.2 Pipe and Valve installation
Piping shall be installed with joints tight and with no undue marring of finishes. Installed piping, valves,
and fittings shall be free from strain and excessive stresses caused by weight or misalignment. In addition
to these requirements, piping shall be installed in accordance with applicable requirements provided in Section
22 00 00 PLUMBING, GENERAL PURPOSE.
3.2.2.1 Flanged Joints
Bolts shall be tightened uniformly to prevent overstressing flanges and misalignment.
3.2.2.2 Screwed Joints
Screwed joints shall be made tight with joint compound, applied to the male threads only, or with joint tape.
3.2.2.3 Push-On Joints
Pipe ends shall be beveled to facilitate assembly. Pipe shall be marked to indicate when the pipe is fully seated.
Gaskets shall be lubricated to prevent displacement. The gasket shall remain in proper position in the bell
or coupling while joints are made.
3.2.2.4 Solvent-Weld Joints
Joints shall be made in accordance with the manufacturer's written instructions.
3.2.2.5 Valves
Valves shall be installed and located for easy access for operation.
3.2.3 Equipment installation
Equipment installation shall be in accordance with the manufacturer's written instructions.
3.2.4 Electrical Work
Electrical work shall be in accordance with the drawings and applicable requirements of Section 26 20 00 INTERIOR
DISTRIBUTION SYSTEM. Equipment shall be suitable for installation in a corrosive environment (NEMA 4X) unless
specified otherwise.
3.3 PAINTING
NOTE: Include Section 09 97 02 PAINTING, HYDRAULIC STRUCTURES in the project,
or incorporate applicable provisions in this paragraph.
Painting shall be performed in accordance with applicable requirements provided in Section [_____] and additional
requirements provided herein.
3.3.1 General
Metal surfaces, except aluminum, bronze, brass, galvanized steel, and stainless steel shall be painted. Surface
preparation and painting shall be performed in the shop or in the field as indicated. Manufactured items, such
as motors and switchboards, shall be finished with the manufacturer's standard finish.
3.3.2 Preparation and Application
Ferrous metal surfaces shall be prepared in accordance with SSPC SP 6and painted with two coats of epoxy paint
in accordance with SSPC PS 13.01.
3.3.3 Testing
Coatings shall be examined for flaws and tested for thickness and holidays. Thickness of coatings shall be measured
wet and dry using a commercial film thickness gauge. The Contracting Officer shall be notified in advance of
any painting. Additional coats shall not be applied until the previous coat has been approved. Repair or additional
coatings shall be accomplished at no additional cost to the government.
3.3.4 Coating Repair
If welding is required after application of the coating or if the coating is damaged in any way, repair shall
consist of preparing the affected area in compliance with SSPC SP 6 and reapplying the coating to that area.
If holidays are detected or film thickness is insufficient, the surface shall be prepared and additional coats
applied in the affected area in compliance with the manufacturer's instructions.
3.4 POSTING FRAMED INSTRUCTIONS
Post the approved wiring and control diagrams showing the complete layout of the entire system, including equipment,
piping valves, and control sequence, framed under glass or in approved laminated plastic, where directed. Condensed
operating instructions explaining preventive maintenance procedures, methods of checking the system for normal
safe operation, and procedures for safely starting and stopping the system shall be prepared in typed form, framed
as specified above for the wiring and control diagrams, and posted beside the diagrams. The framed instructions
shall be posted before acceptance testing of the systems.
3.5 FIELD TESTS AND INSPECTIONS
3.5.1 General
The Contractor shall perform the field tests. The Contracting Officer will witness field tests and conduct field
inspections. The Contracting Officer shall be notified 7 days prior to the dates and times for acceptance tests.
Any deficiencies found shall be rectified and work affected by such deficiencies shall be retested at the Contractor's
expense.
3.5.2 Initial Acceptance Test
After completion of the installation and as soon as practical, an operating test of the Filter Press and associated
equipment shall be performed to demonstrate that the system functions properly. The initial tests shall include
the manufacturer's recommended tests for equipment vibration, horizontal and vertical alignment structural integrity,
leaks in piping and seals, correct operation of control systems and equipment, and excessive noise levels. Horsepower
shall be checked and verified with the manufacturer's design data for the specified equipment. Tests shall demonstrate
that the equipment is not electrically, mechanically, structurally, or otherwise defective; is in safe and satisfactory
operating condition; and conforms to the specified operating characteristics. After completion of the tests,
the system shall be adjusted for proper operation, in accordance with the manufacturer's written instructions
and the operating and maintenance instructions.
3.5.3 Final Acceptance Test
NOTE: This paragraph only applies to specific circumstances such as partial
installation of the dewatering system components at different periods of time.
If not applicable, delete this paragraph.
Six months after completion of the initial acceptance test, a retest of the equipment shall be conducted to verify
that the equipment functions as specified under actual operating conditions. Equipment not capable of performing
as specified will be replaced or upgraded at no cost to the government.
3.6 MANUFACTURER'S SERVICES
3.6.1 Installation, Adjustment, and Testing
Provide a manufacturer's representative who is experienced in the installation, adjustment, and operation of
the equipment to supervise the installation, adjustment and testing of the equipment.
3.6.2 Field Training
Conduct a field training course for the designated operating and maintenance staff members. Training shall be
provided for a period of [24] [_____] hours of normal working time and shall start after the system is functionally
complete, but prior to final acceptance test. The field instructions shall cover the items contained in the
Operating and Maintenance Instructions, as well as demonstrations of routine maintenance operations. Prepare
a video tape of the field training course for a permanent record for future training use.