USACE / NAVFAC / AFCESA / NASA UFGS-22 13 36 (February 2006)
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Preparing Activity: USACE Superseding
UFGS-22 13 36 (April 2006)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 22 13 36
PNEUMATIC SEWAGE EJECTORS
02/09
NOTE: This guide specification covers the requirements for pneumatic sewage
ejectors.
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
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 WATER WORKS ASSOCIATION (AWWA)AWWA C115/A21.15(2005) Flanged Ductile-Iron Pipe With Ductile-Iron or Gray-Iron Threaded FlangesAWWA C203(2002) Coal-Tar Protective Coatings and Linings for Steel Water Pipelines - Enamel and Tape - Hot-Applied][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 B16.3(2006) Malleable Iron Threaded Fittings, Classes 150 and 300ASME B16.39(1998; R 2006) Standard for Malleable Iron Threaded Pipe Unions; Classes 150, 250, and 300ASME B19.3(1991; Addenda A 1994; Addenda B 1995) Safety Standard for Compressors for Process IndustriesASME BPVC SEC VIII D1(2007; Addenda 2008) Boiler and Pressure Vessel Code; Section VIII, Pressure Vessels Division 1 - Basic Coverage][ASTM INTERNATIONAL (ASTM)ASTM A 153/A 153M(2005) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel HardwareASTM A 53/A 53M(2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless][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 ApplicationMSS SP-70(2006) Standard for Cast Iron Gate Valves, Flanged and Threaded EndsMSS SP-80(2008) Bronze Gate, Globe, Angle and Check Valves][NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)NEMA 250(2003) Enclosures for Electrical Equipment (1000 Volts Maximum)NEMA ICS 2(2000; Errata 2002; R 2005; Errata 2006) Standard for Industrial Control and Systems: Controllers, Contractors, and Overload Relays Rated Not More than 2000 Volts AC or 750 Volts DC: Part 8 - Disconnect Devices for Use in Industrial Control EquipmentNEMA MG 1(2007; Errata 2008) Standard for Motors and Generators][THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)SSPC PS 11.01(1982; E 2004) Black (or Dark Red) Coal Tar Epoxy-Polyamide Painting System]
1.2 SYSTEM DESCRIPTION
NOTE: Select maximum sphere size required for project. Normal facilities allow
entrance of solids up to 65 mm (2-1/2 inches). Larger solids may be required
to be handled depending on type of solids in entering sewage.
Consider requiring small capacity ejectors for office buildings and small residential
group applications be provided as completely factory assembled, preconnected
and coordinated components, packaged units for ease in installation.
Provide sewage ejectors of the duplex pneumatic type complete with [receivers,] [receivers and compressors,]
electric motors, control equipment, piping, and all necessary accessories. Capacities of all equipment and materials
shall be not less than those specified or indicated. Ejector shall be able to pass through maximum sphere size
of [65] [75] [100] [_____] mm [2-1/2] [3] [4] [_____] inch diameter.
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.] Submit the following in
accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
SD-02 Shop Drawings
Equipment Installation
Drawings containing complete wiring and schematic diagrams and any other details required
to demonstrate that the system has been coordinated and will 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 for maintenance and operation.
SD-03 Product Data
Materials and Equipment
Sewage Receiver
Air Compressor
Air Reservoir
Electric Motor
Controls
Data consisting of manufacturer's descriptive and technical literature, catalog cuts, performance
charts and curves, and installation instructions.
Spare Parts
Spare Parts data, as specified.
SD-10 Operation and Maintenance Data
Operation and Maintenance Manuals[; G][; G, [_____]]
[Six] [_____] copies of operation and [six] [_____] copies of maintenance manuals are required
for the equipment furnished. One complete set shall be furnished prior to performance testing
and the remainder shall be furnished upon acceptance. Manuals shall be approved prior to the
field training course. Operating manuals shall detail the step-by-step procedures required
for system start-up, operation, and shut-down. Operating manuals shall include the manufacturer's
name, model number, parts list, and a brief description of all equipment and their basic operating
features. Maintenance manuals shall list routine maintenance procedures, possible breakdowns
and repairs, and troubleshooting guides. Maintenance manuals shall include piping and equipment
layout and simplified wiring and control diagrams of the system as installed.
1.4 DELIVERY, STORAGE, AND HANDLING
Protect equipment delivered and placed in storage from the weather, excessive humidity and excessive temperature
variation; and dirt, dust, or other contaminants.
1.5 EXTRA MATERIALS
Submit spare parts data for each different item of material and equipment specified and include a complete list
of parts and supplies, with current unit prices and source of supply. Provide one set of special tools, calibration
devices, and instruments required for operation, calibration, and maintenance of the equipment.
PART 2 PRODUCTS
2.1 GENERAL MATERIAL AND EQUIPMENT REQUIREMENTS
2.1.1 Standard Products
Provide materials and equipment which are the standard products of a manufacturer regularly engaged in the manufacture
of such products and tat essentially duplicate items that have been in satisfactory use 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
Each major item of equipment shall have the manufacturer's name, address, type or style, model or serial number,
and catalog number on a plate secured to the item of equipment.
2.1.3 Protection from Moving Parts
Fully enclose or guard belts, pulleys, chains, couplings, projecting setscrews, keys, and other rotating parts
located so that any person can come in close proximity thereto.
2.2 MATERIALS AND EQUIPMENT
Materials and equipment shall conform to the following requirements:
2.2.1 Check Valves
Check valves shall conform to MSS SP-80, Type 3 or 4, Class 125, except that valves on the discharge side of
the receivers shall be provided with replaceable valve seats.
2.2.2 Cast Iron Gate Valves
NOTE: Consider ball valves for small capacity, 1.25 - 2.5 liters per second
(20-40 gpm), ejectors. For 80 to 100 mm (3-4 inch) valves, manufacturers claim
noiseless operation with virtually no wear on moving parts.
Cast iron gate valves shall conform to MSS SP-70, Type I, II, or III, Class 125, threaded or flanged ends.
2.2.3 Bronze Gate Valves
NOTE: Consider ball valves for small capacity, 1.25 - 2.5 liters per second
(20-40 gpm), ejectors. For 80 to 100 mm (3-4 inch) valves, manufacturers claim
noiseless operation with virtually no wear on moving parts.
Bronze gate valves shall conform to MSS SP-80, Type 1, Class 125.
2.2.4 Motor Controls
Motor controls shall conform to NEMA ICS 2.
2.2.5 Cast Iron Pipe
Cast iron pipe shall conform to AWWA C115/A21.15, Class 150, as applicable to pipe barrel only; ASME B16.1, Class
125, for pipe flange.
2.2.6 Steel Pipe
Steel pipe shall conform to ASTM A 53/A 53M, standard weight, zinc coated.
2.2.7 Cast Iron Pipe Fittings
Cast iron pipe fittings shall conform to ASME B16.1.
2.2.8 Malleable Iron Fittings
Malleable iron fittings shall conform to ASME B16.3.
2.2.9 Malleable Iron Unions
Malleable iron unions shall conform to ASME B16.39, Type B.
2.2.10 Pipe Hangers and Supports
Pipe hangers and supports shall conform to MSS SP-58 and MSS SP-69, Type [_____] hanger, Type [_____] supports.
2.2.11 Bolts, Nuts, Anchors, and Washers
Bolts, nuts, anchors, washers, and all other types of support necessary for the installation of the equipment
shall be furnished and shall be of steel galvanized according to ASTM A 153/A 153M.
2.3 SEWAGE RECEIVER
Sewage receiver shall be of cast iron or welded steel construction conforming to ASME BPVC SEC VIII D1. Sewage
inflow and outflow pipe connections shall be flanged; air-supply and vent-piping connections shall be screwed.
Pipe threads shall conform to ASME B1.20.1, and pipe flanges shall conform to ASME B16.1. The receiver shall
be designed for a working pressure of [_____] kPa psi and tested at a pressure 50 percent greater than the working
pressure. Receiver shall be provided with suitable support and a manhole or handhole conveniently located.
Steel receiver shall be coated [inside] [inside and outside] with coal tar primer and enamel conforming to the
requirements of AWWA C203 in all respects of material and application, or shall be coated with a coal-tar epoxy
paint system conforming to the requirements of SSPC PS 11.01. The interior walls of the receiver and inflow
and outflow openings, approaches and fittings shall be free from any obstructions that might interfere with the
free passage of raw unscreened sewage. Ejector unit shall have sufficient capacity for the discharge of sanitary
sewage under the conditions of rate of flow, static head, and friction loss. As used herein, rate of flow is
the continuous rate of flow into the ejector station; static head is the difference between the invert elevations
of the inlet sewer to the ejector station and the force main at the point of final discharge; and friction loss
is computed on the basis of the indicated continuous rate of flow.
2.4 AIR COMPRESSOR
NOTE: If compressed air is to be supplied from a central plant, this paragraph
will be deleted. If a central air supply is used, a pressure-reducing valve
may be required and will be specified. Indicate m3/s (cfm) and kPa (psi) requirements
for compressors on the drawings. Include an air reservoir to the air compressor
in this paragraph if needed.
Air shall be supplied to the sewage receivers by air compressors of capacities indicated to supply air to operate
the ejectors. Each compressor shall be equipped with suction silencer, complete automatic lubrication system,
an air filter, and means for cooling. The compressors shall be designed for operation without water seal or
any water connection. The air compressor shall conform to ASME B19.3. Air compressor unit shall be a factory
packaged assembly. Each duplex compressor system shall be provided with [automatic alternation system] [manual
alternation system].
2.5 AIR RESERVOIR
NOTE: A manhole will be specified for tanks larger than 1000 mm (36 inches)
in diameter. An inspection opening will be specified for tanks 1000 mm (36
inches) in diameter or smaller.
If the equipment furnished requires a compressed-air reservoir for proper operation, the tank shall be constructed
in conformance with ASME BPVC SEC VIII D1, with flanged or screwed inlet and outlet connections as required.
A display of the ASME seal on the receiver or a certified test report from an approved independent testing laboratory
indicating compliance shall be provided. The storage tank shall be designed for a working pressure of [_____]
kPa psi and tested at a pressure 50 percent greater than the working pressure. The tank shall be fitted with
a pressure gauge, [manhole,] [inspection openings,] blowoff cock, and a safety valve set at [_____] kPa psi.
The connection to the compressor shall be provided with a check valve and a shutoff valve.
2.6 ELECTRIC MOTOR
NOTE: If more than one type motor is required, each type will be specified.
Motors installed above grade in normal-atmosphere frames will have open type
frames. Motors installed in pits below grades will have dripproof frames.
Each electric motor shall conform to NEMA MG 1 and shall be suitable for operation of [_____]-volt [_____]-Hz
[_____]-phase alternating current. Motor frames shall be of the [open] [dripproof] [totally enclosed] [explosion
proof] type. Temperature rise shall be based on minus 40 degrees C minus 40 degrees F ambient temperature.
2.7 CONTROLS
NOTE: NEMA 3R and NEMA 4 Types are exterior panel types.
Provide an automatic-control system for each ejector. The controls shall consist of suitable devices for regulating
the cycle of each sewage receiver and each compressor. Valves and accessories as required to control the flow
of air to the sewage receiver, to exhaust the residual air, and to vent the receiver to the outside shall be
provided. Pressure switches to control the operation of each compressor shall be provided on the air reservoir.
Automatic controls shall be enclosed in a NEMA 250, [Type 12] [Type 3R] [Type 4] panel and shall be completely
wired and tested with internal connections being made on terminal blocks. Sensor, motor control, and motor shall
be factory preconnected. Local or remote alarm signalling shall be provided as required. An air operated automatic
valve shall be provided between air compressor and ejector to control admission and relief of air to and from
ejector, and to prevent waste materials or gases from entering compressor. The ejection cycle shall be controlled
by a fully transistorized solid-state electronic liquid level control device, which shall activate the compressor
motor. The liquid level control device shall sense liquid level by use of a stainless steel probe mounted in
the receiver. The ejection cycle shall be adjustable from [_____] to [_____] seconds by an integral adjustable
timer. Controls shall include manual-off-automatic three-way switch.
2.8 ELECTRICAL WORK
Provide electric motor driven equipment specified complete with motor, motor starter, wiring, and controls in
accordance with Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM. Electrical characteristics shall be as indicated.
Motor starters shall be provided complete with properly sized thermal overload protection and other appurtenances
necessary for the motor control specified. Starters shall be furnished in [general purpose] [watertight] [explosion-proof,
Class I, Division 1] enclosures. Motors shall be of sufficient capacity to drive the equipment at the specified
capacity without exceeding the nameplate rating on the motor. Manual or automatic control and protective or
signal devices required for the operation specified and any control wiring required for controls and devices
but not shown shall be provided.
2.9 FACTORY PAINTING
NOTE: Corrosion coating for items exposed to direct sunlight should be high-build
epoxy in lieu of coal tar epoxy.
The equipment shall be thoroughly cleaned, primed, and given two finish coats of paint at the factory in accordance
with the recommendations of the manufacturer.
PART 3 EXECUTION
3.1 EXAMINATION
After becoming familiar with all details of the work, verify all dimensions in the field, and advise the Contracting
Officer of any discrepancy before performing the work.
3.2 PIPING INSTALLATION
The sewage influent and effluent lines shall be flanged cast iron. The air piping shall be steel with malleable
iron unions and fittings.
3.2.1 Cast Iron Pipe Joints
Flanges of the pipe shall be wiped clean, and the sections shall be pushed together evenly after a cloth-reinforced
rubber gasket, as furnished by the manufacturer, has been placed between the flanges. Bolts and nuts shall be
loosely assembled by hand and then tightened evenly with a wrench of the type and length recommended by the manufacturer.
Opposite nuts shall be turned alternately to avoid damage from excessive tightening.
3.2.2 Steel Pipe Joints
Install steel pipe with sufficient unions to facilitate maintenance and removal of pipe and fittings. After
cutting and before threading, pipe shall be reamed. Threads shall be full cut, and no more than three threads
on the pipe shall remain exposed after assembly. Joints shall be made tight with a stiff mixture of graphite
and oil, or an inert filler and oil, or an approved thread lubricant, applied with a brush to the male threads
only. Caulking of threaded joints will not be permitted.
3.2.3 Pipe Hangers and Supports
Use pipe hangers and supports on all pipe runs longer than 3 m 10 feet. The pipe hangers and supports shall
be spaced at not more than 3 m 10 feet. Horizontal pipe shall be supported near fittings at each change in direction
of piping and not more than 1.5 m 5 feet apart at valves. Vertical piping shall be supported at base, at intervals
not more than 4.5 m 15 feet and at terminations.
3.3 VALVE INSTALLATION
Valves installed in the steel pipeline shall be bronze with screwed ends, and valves installed in the cast-iron
pipeline shall have bronze-mounted iron bodies with flanged ends. Each valve shall have the year of manufacture
cast in the body. Remove and replace, at no additional cost to the Government, any valve that does not seat
tightly or does not operate satisfactorily.
3.3.1 Gate Valves
Open gate valves by turning counterclockwise. The operating nut shall have an arrow cast in the metal, indicating
the direction of opening. Before the valve is installed, the stuffing boxes shall be tightened and the valve
operated to see that all parts are in working condition.
3.3.2 Check Valves
Provide check valves with freely operating, positively seating flaps, and easily removable covers.
3.4 EQUIPMENT INSTALLATION
Unless otherwise indicated, install all equipment in accordance with manufacturer's recommendations. Installation
of the air [compressor] [compressor and air reservoir] shall conform to ASME B19.3.
3.5 FIELD PAINTING
Field painting, required for ferrous surfaces not furnished at the factory, is specified in Section 09 90 00
PAINTS AND COATINGS.
3.6 CONCRETE FOUNDATIONS
Provide concrete for foundation as specified in Section 03 31 00.00 10 CAST-IN-PLACE STRUCTURAL CONCRETE. Concrete
foundations shall be integral with and of the same class as the building floor unless otherwise indicated. Class
B concrete shall be used in foundations that are entirely separated from the surrounding floor. When new foundations
are constructed on existing concrete, the new concrete shall be bonded to the old as specified in Section
03 31 00.00 10 CAST-IN-PLACE STRUCTURAL CONCRETE. Foundation bolts, as required, shall be provided for positioning
during the placement of the concrete.
3.7 TESTS
NOTE: Consider accepting a Certificate of Compliance for capacity of ejectors
of small size capacity where requiring shop tests or installed tests for capacity
would add disproportionately to the cost.
Either furnish the manufacturer's report of ejector capacity determined by shop tests or make such tests as may
be necessary to determine the capacity, and perform such other tests as will ensure that the ejectors have been
installed in accordance with the specifications.
3.8 MANUFACTURER'S FIELD SERVICES
Provide services of a manufacturer's representative who is experienced in the installation, adjustment, and operation
of the equipment specified. The representative shall supervise the installation, adjustment, and testing of
the equipment in accordance with the approved Operation and Maintenance Manuals.