USACE / NAVFAC / AFCESA / NASA UFGS-23 22 25 (February 2009)
-------------------------------
Preparing Activity: NASA Superseding
UFGS-23 09 13.33 40 (August 2008)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 23 22 25
STEAM VALVES
02/09
NOTE: This specification covers the requirements for valves for steam and condensate
systems.
Standard valves for steam, water, etc., operating at 178 degrees C and 900 kilopascal
353 degrees F and 125-pounds per square inch gage working steam pressure are
covered in Section 23 05 15 COMMON PIPING FOR HVAC.
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 WELDING SOCIETY (AWS)AWS A5.13(2000) Specification for Surfacing Electrodes for Shielded Metal Arc Welding][ASME INTERNATIONAL (ASME)ASME B1.20.1(1983; R 2006) Pipe Threads, General Purpose (Inch)ASME B1.20.1M(1983; R 2001) Pipe Threads, General Purpose (Metric)ASME B16.1(2005) Standard for Gray Iron Threaded Fittings; Classes 125 and 250ASME B16.34(2004) Valves - Flanged, Threaded and Welding End][ASTM INTERNATIONAL (ASTM)ASTM A 105/A 105M(2005) Standard Specification for Carbon Steel Forgings for Piping ApplicationsASTM A 106/A 106M(2008) Standard Specification for Seamless Carbon Steel Pipe for High-Temperature ServiceASTM A 126(2004) Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe FittingsASTM 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 216/A 216M(2008) Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature ServiceASTM A 436(1984; R 2006) Standard Specification for Austenitic Gray Iron CastingsASTM B 61(2008) Standard Specification for Steam or Valve Bronze CastingsASTM B 62(2002) Standard Specification for Composition Bronze or Ounce Metal Castings][ISA - INTERNATIONAL SOCIETY OF AUTOMATION (ISA)ISA RP60.9(1981) Piping Guide for Control Centers][MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY (MSS)MSS SP-70(2006) Standard for Cast Iron Gate Valves, Flanged and Threaded EndsMSS SP-80(2008) Bronze Gate, Globe, Angle and Check ValvesMSS SP-86(2002) Guidelines for Metric Data in Standards for Valves, Flanges, Fittings and Actuators][U.S. GENERAL SERVICES ADMINISTRATION (GSA)FS A-A-50457(2001a) Valves Radiator, Heating Packless Bonnett, Class 125 PSIG]1.2 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.][for 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
Submit Fabrication Drawings for the following in accordance with paragraph entitled, "General
Requirements," of this section.
Valves
Accessories
Installation drawings for valves must be in accordance with the paragraph entitled, "Installation,"
of this section.
SD-07 Certificates
Submit Listing of Product Installation in accordance with paragraph entitled, "General Requirements,"
of this section.
Submit certificates for the following items showing conformance to the referenced standards
contained in this section:
Gate Valves
Globe and Angle Valves
Check Valves
Cone-Plug Balancing Valve
Eccentric Plug Valves
Dial Cocks
Diaphragm Control and Instrument Valves
1.3 GENERAL REQUIREMENTS
NOTE: If Section 23 00 00 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST
SYSTEMS is not included in the project specification, applicable requirements
therefrom should be inserted and the first paragraph deleted. If Section
40 17 30.00 40 WELDING GENERAL PIPING is not included in the project specification,
applicable requirements therefrom should be inserted and the second paragraph
deleted.
[Section 23 00 00 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEMS applies to work specified in this
section.]
[Section 40 17 30.00 40 WELDING GENERAL PIPING applies to work specified in this section.]
Submit Fabrication Drawings for each type of Valves and Accessories used, meeting referenced standards contained
within this section.
Submit Listing of Product Installation for valve assemblies indicating at least five installed units, similar
to those proposed for use, that have been in successful service for a minimum of five years.
PART 2 PRODUCTS
2.1 COMPONENTS
2.1.1 Dial Cocks
Dial cocks in sizes DN65 2-1/2-inch ips and smaller with pointer and etched position dial must be rated 1100
kilopascal 150-psi working steam pressure (wsp) and be of manufacturer's standard all-brass construction.
2.1.2 Diaphragm Control And Instrument Valves (DCIV)
Diaphragm control and instrument valves in sizes DN8 and DN10 1/4 and 3/8 inch must have a forged-brass body
with reinforced tetrafluoroethylene diaphragm, and an AISI 300 series corrosion-resistant steel spring with round
phenolic handle. Fit handle with disks color-coded in accordance with ISA RP60.9.
2.2 FABRICATION
2.2.1 Gate Valves
NOTE: These valves are recommended for steam and condensate service.
2.2.1.1 2500 kPa 350 psi
Rate valves 2100 kilopascal 300 pounds per square inch (psi) working steam pressure (wsp) and ensure conformance
to ASME B16.34.
Body end connections must be flanged for all valves larger than DN50 2 inches, unless butt weld ends are specified.
Use [Screwed] [Socket] weld for sizes DN50 2 inches and under to suit specified piping system end connection
and maintenance requirements, or be welded. Flange faces must have concentric serrated finish.
Body to bonnet connection must be [union] [gasketed-bolted] type for valvesDN50 2 inches and under and gasketed-bolted
type for valves larger than DN502 inches. Bonnet must be outside screw and yoke (OS&Y) type, rising stem.
Body and bonnet assembly must be [cast steel] [forged carbon steel]. Cast steel must conform to ASTM A 216/A 216M
, Grade WCB. Forged carbon steel must conform to ASTM A 105/A 105M.
NOTE: Select the following paragraph only after checking flow coefficients.
[Valves must have a full port.]
Trim must include [hard-surfaced solid] [one-piece flexible] wedge disc and hard-surfaced seats. Stem must be
rising and backseating type.
Trim materials and hard-surfaced substrates must [conform to ASTM A 182/A 182M, Grade F6] [must be manufacturer's
standard metallurgical equivalents for the specified service].
Hard surfacing alloy must conform to AWS A5.13, [Class RNiCr-B] [Class RCoCr-B].
Wire-reinforce packing, fiber braid impregnated with [30 percent tetrafluoroethylene] [a corrosion-inhibiting
lubricant specifically suitable for service with stem material provided].
Valve wheels must be [cast iron] [malleable iron] [wrought steel].
NOTE: Drawings shall note all locations where an integral bypass valve is required.
Integral bypass valves are used for valves larger than DN150 6 inchesand for
smaller sizes where unusual warmup operations will occur.
Provide integral bypass globe valves around valves larger than DN150 6 inches. Bypass valves must be factory
installed and have [butt] [socket] welded end, conforming to the same requirements as the main valve, except
that in all cases valve seat and plug disk must be hard surfaced and seat must be removable, replaceable type.
Piping connections must be pressure tubing, conforming to Schedule 80 ASTM A 106/A 106M, Grade [B] [C], and without
change of direction fittings, i.e., bent. Connection must be to valve bosses located to perform specified function.
Ship valves with integral bypass bolted to crates in a manner that will preclude damage to bypass assembly.
NOTE: Drawings shall note all locations where integral drain valve is required.
Integral drain valves are particularly useful in tall risers and shall be noted
in all cases where required except where valve size is less than DN50 2 inches
, in which case an independent drain shall be provided immediately above the
valve. Note pitch of horizontal lines.
Integral drain valve assembly must be [factory] [field] installed. Weld connection to main valve body. Trim
drain valve with manufacturer's standard hardened corrosion-resistant steel. Piping must be pressure tubing conforming
to ASTM A 106/A 106M, Grade [B] [C]. Drain discharge must be [capped] [plugged]; threaded closure assembly made
with tetrafluoroethylene tape.
2.2.1.2 1100 kPa 150 psi
Rate valves 1100 kilopascal 150-psi (wsp) and ensure conformance to ASME B16.34.
Body end connections must be flanged for all valves larger than DN50 2 inches unless butt weld ends are specified.
Use [Screwed] [Socket] weld for sizes DN50 2 inches and under to suit specified piping system end connection
and maintenance requirements. Flange faces must have concentric serrated finish.
Body to bonnet connection must be [union] [gasketed-bolted] type for valvesDN50 2 inches and under and gasketed-bolted
type for valves larger than DN502 inches. Bonnet must be OS&Y type, rising stem.
Body and bonnet assembly must be [cast steel] [forged carbon steel]. Cast steel must conform to ASTM A 216/A 216M
, Grade WCB. Forged carbon steel must conform to ASTM A 105/A 105M.
NOTE: Select the following paragraph only after checking flow coefficients.
[Valves must have a full port.]
Trim for valves larger than DN50 2 inches must include [hard surfaced solid] [one-piece flexible-wedge] disk
and hard-surfaced seats. Trim for valves DN50 2 inches and under must include [hard-surfaced] [hardened-solid]
[one-piece flexible wedge disk] and [hard-surfaced] [hardened seats]. Hardened components must have Brinell
hardness of not less than 500. Stem must be rising and backseating type.
Trim materials and hard-surfaced substrates [must conform to ASTM A 182/A 182M, Grade F6] [must be manufacturer's
standard metallurgical equivalents for the specified service].
Hard-surfacing alloy must conform to AWS A5.13, [Class RNiCr-B] [Class RCoCr-B].
Wire reinforce packing, fiber braid impregnated with [30 percent tetrafluoroethylene] [a corrosion-inhibiting
lubricant specifically suitable for service with stem material provided].
Valve wheels must be [cast iron] [malleable iron] [wrought steel].
NOTE: Drawings shall note all locations where an integral bypass valve is required.
Integral bypass valves are used for valves larger than DN150 6 inchesand for
smaller valves where unusual warmup operations will occur.
Provide integral bypass globe valves around valves larger than DN150 6 inches. Factory install bypass valves
and [butt] [socket] weld end, conforming to the same requirements as the main valve except that in all cases,
valve seat and disk must be hard-surfaced and seat must be removable, replaceable type. Piping connections must
be pressure tubing, conforming to Schedule 80 ASTM A 106/A 106M, Grade [B] [C], and without change of direction
fittings; i.e., bent. Connection must be to valve bosses located to perform specified function. Ship valves
with integral bypass bolted to crates in a manner that will preclude damage to bypass assembly.
NOTE: Drawings shall note all locations where integral drain valve is required.
Integral drain valves are particularly useful in tall risers and shall be noted
in all cases where required except where valve size is less than DN50 2 inches
, in which case an independent drain shall be provided immediately above the
valve. Note pitch of horizontal lines.
[Factory] [Field install] integral drain valve assembly. Factory drill main valve boss. Weld connection to
main valve body. Trim drain valve with manufacturer's standard hardened corrosion-resistant steel. Piping must
be pressure tubing conforming to ASTM A 106/A 106M, Grade [B] [C]. [Cap] [Plug] drain discharge, and make threaded
closure assembly with tetrafluoroethylene tape. Provide all necessary handling and shipping care.
2.2.1.3 900 kPa125 psi
Rate valves 900 kilopascal 125-psi (wsp) and ensure conformance to MSS SP-80and MSS SP-86 wedge disc, rising
stem, inside screw, 900 kilopascal 125-pound for sizes DN50 2 inches and under and to MSS SP-70 for sizes over
DN50 2 inches.
Body end connections must be flanged for all valves larger than DN50 2 inches and screwed in sizes DN50 2 inches
and under to suit specified piping system end connection and maintenance requirements.
Valves, in sizes DN50 2 inches and under, must be union-bonnet type. Cast iron must conform to ASTM A 126, Class
B.
Stem must be rising and backseating type.
Packing must be fiber braid impregnated with 30 percent tetrafluoroethylene.
Valve wheels must be [cast iron] [malleable iron] [wrought steel].
NOTE: The following materials selection may be desirable as a means of eliminating
dissimilar metal couples in a corrosive condensate. Forged steel valve cost
premium on per-unit basis is approximately 100 percent.
Coordinate the following selection with appropriate selections for 1100 150
service valves.
For condensate service, screwed-end gate valves must be 1100 kilopascal150-psi, wsp-rated, forged steel, conforming
to ASME B16.34, except that trim must be manufacturer's standard corrosion-resistant steel.
NOTE: Drawings shall note all locations where an integral bypass valve is required.
Integral bypass valves are used for valves larger than DN150 6 inchesand where
warmup operations will occur.
Provide integral bypass globe valves around valves larger than DN150 6 inches. Factory install main valve body
taps. Bypass valves must be globe type, [factory] [field] installed, and have a socket welded end conforming
to ASME B16.34, except that in all cases, valve seat and plug disk must be hard-surfaced and seats must be removable
replaceable type. Piping connections must be pressure tubing, conforming to Schedule 80 ASTM A 106/A 106M, Grade
[B] [C], and without change of direction fittings; i.e., bent, and include a socket welded end 20700 kilopascal
3,000-psi-rated, forged steel union with corrosion-resistant steel insert. Connection must be to valve bosses
located to perform specified function. Ship valves with integral bypass bolted to crates in a manner that will
preclude damage to bypass assembly.
NOTE: Drawings shall note all locations where integral drain valve is required.
Integral drain valves are particularly useful in tall risers and shall be noted
in all cases where required except where valve size is less than DN50 2 inches
, in which case an independent drain shall be provided immediately above the
valve. Note pitch of horizontal lines.
Provide integral drain valves. Factory finish main valve boss penetration, and [factory] [field] install. Drain
valve must be gate type. Piping must be pressure tubing conforming to ASTM A 106/A 106M, Grade [B] [C]. [Cap]
[Plug] drain discharge, and thread closure assembly with tetrafluoroethylene tape.
2.2.2 Globe And Angle Valves
NOTE: These valves are recommended for steam and condensate service.
2.2.2.1 2500 kPa350 psi
Rate valves 2100 kilopascal 300-psi (wsp) and ensure conformance to ASME B16.34.
Body end connections must be flanged for all valves larger than DN50 2 inches, unless butt weld ends are specified.
[Screwed] [Socket] weld must be used for sizes DN50 2 inches and under to suit specified piping system end connection
and maintenance requirements. Flange faces must have concentric serrated finish.
Body to bonnet connection must be [union] [gasketed-bolted] type for valves DN50 2 inches and under; gasketed-bolted
type for valves larger than DN50; 2 inches; and for valves DN10 3/8 inch and under, assembly must be screwed
type. Bonnet must be OS&Y type, except that valves DN10 3/8 inch and under must be inside screw type.
Body and bonnet assembly must be [cast steel] [forged carbon steel]. Cast steel must conform to ASTM A 216/A 216M
, Grade WCB. Forged carbon steel must conform to ASTM A 105/A 105M.
Trim must include hard-surfaced plug disk and hard-surfaced seats. Stem must be rising and backseating type.
Trim materials and hard surface substrates must [conform to ASTM A 182/A 182M, Grade F6] [be manufacturer's standard
metallurgical equivalents for the specified service].
Hard-surfacing alloy must conform to AWS A5.13, [Class RNiCr-B] [Class RCoCr-B].
Wire reinforce packing, fiber braid impregnated with [30 percent tetrafluoroethylene] [a corrosion-inhibiting
lubricant specifically suitable for service with stem material provided].
Valve wheels must be [cast iron] [malleable iron] [wrought steel].
NOTE: Drawings shall note all locations where integral drain valve is required.
Integral drain valves are particularly useful in risers and shall be noted in
all cases where required except where valve size is less than DN50 2 inches,
in which case an independent drain shall be provided immediately above the valve.
Note pitch of horizontal lines.
Provide integral drain valves. Main valve boss penetration must be factory finished and drain assembly must
be [factory] [field] installed. Weld connection to main valve body. Trim drain valve with manufacturer's standard
hardened corrosion-resistant steel. Piping must be pressure tubing, conforming to ASTM A 106/A 106M, Grade [B]
[C]. Drain discharge must be [capped] [plugged], and threaded closure assembly must be made with tetrafluoroethylene
tape.
2.2.2.2 1100 kPa150 psi
Rate valves 1100 kilopascal 150-psi working steam pressure (wsp) and ensure conformance to ASME B16.34.
Body end connections must be flanged for all valves larger than DN50 2 inches, unless butt weld ends are indicated.
Use [Screwed] [Socket] weld for sizes DN50 2 inches and under to suit specified piping system end connection
and maintenance requirements. Flange faces must have concentric serrated finish.
Body to bonnet connection must be [union] [gasketed-bolted] type for valves DN50 2 inches and under; gasketed-bolted
type for valves larger than DN50 2 inches; and for valves DN10 3/8 inchand under, assembly must be screwed type.
Bonnet must be OS&Y type, except that valves DN10 3/8 inch and under must be inside screw type.
Body and bonnet assembly must be [cast steel] [forged carbon steel]. Cast steel must conform to ASTM A 216/A 216M
, Grade WCB. Forged carbon steel must conform to ASTM A 105/A 105M.
Trim for valves larger than DN50 2 inches and for all sizes of valves in bypass service must include hard-surfaced,
solid plug disk and hard-surfaced seats. Plug material in valves DN50 2 inches and under must be [as specified
for valves larger than DN50 2 inches] [in accordance with AISI 400 series corrosion-resistant steel hardened
to not less than 500 Brinell]. Stem must be rising and backseating type.
Trim materials and hard surface substrates [must conform to ASTM A 182/A 182M, Grade F6] [must be manufacturer's
standard metallurgical equivalents for the specified service].
Hard-surfacing alloy must conform to AWS A5.13, [Class RNiCr-B] [Class RCoCr-B].
Wire reinforce packing, fiber braid impregnated with [30 percent tetrafluoroethylene] [a corrosion-inhibiting
lubricant specifically suitable for service with stem material provided].
Valve wheels must be [cast iron] [malleable iron] [wrought steel].
NOTE: Drawings shall note all locations where integral drain valve is required.
Integral drain valves are particularly useful in tall risers and shall be noted
in all cases where required except where valve size is less than DN50, 2 inches,
in which case an independent drain shall be provided immediately above the
valve. Note pitch of horizontal lines.
Integral, drain-valves assembly must be [factory] [field] installed. Factory drill main valve boss. Weld connection
to main valve body. Trim drain valve with manufacturer's standard hardened corrosion-resistant steel. Piping
must be pressure tubing conforming to ASTM A 106/A 106M, Grade [B] [C]. [Cap] [Plug] drain discharge. Threaded
closure assembly must be made with tetrafluoroethylene tape.
2.2.2.3 900 kPa125 psi
Valves must be rated 900 kilopascal 125-psi (wsp) and must conform to MSS SP-80, MSS SP-86, [globe] [angle],
[900] [1100] kilopascal. [125] [150]-pound.
Body end connections must be flanged for all valves larger than DN50 2 inches and screwed for sizes DN50 2 inches
and under.
Valves DN50 2 inches and under in size must be union bonnet type.
Cast iron must conform to ASTM A 126, Class B.
Stem must be rising and backseating type.
Composition seating surface disc construction may be substituted for metal plug disc connection.
NOTE: Select the following paragraph for large pressure regulating stations.
[Pressure regulating station bypass valves must be 1100 kilopascal 150 psi.]
NOTE: Select the following paragraph for miscellaneous high-pressure drop throttling.
[Plug material for throttling valves DN50 2 inches and under must be AISI 400 series corrosion-resistant steel
hardened to not less than 500 Brinell.]
Packing must be fiber braid impregnated with 30 percent tetrafluoroethylene.
Valve wheels must be [cast iron] [malleable iron] [wrought steel].
NOTE: Drawings shall note all locations where integral drain valve is required.
Integral drain valves are particularly useful in tall risers and shall be noted
in all cases where required, except where valve size is less than DN50 2 inches
in which case an independent drain shall be provided immediately above the
valve. Note pitch of horizontal lines.
Provide integral drain valves. Main valve boss penetration must be factory finished and drain assembly and be
[factory] [field] installed. Drain valve must be gate type. Piping must be pressure tubing conforming to ASTM A 106/A 106M
, Grade [B] [C]. Drain discharge must be [capped] [plugged], and threaded closure assembly and be made with
tetrafluoroethylene tape. Provide all necessary handling and shipping care.
2.2.3 Check Valves
NOTE: These valves are recommended for steam and condensate service.
2.2.3.1 2500 kPa350 psi
Rate valves 2100 kilopascal 300-psi wsp and ensure conformance to applicable portions of ASME B16.34.
Valves must be horizontal swing-check type.
Body end connections must be flanged for all valves larger than DN50 2 inches unless butt weld ends are specified.
[Screwed] [Socket] weld and be used for sizes DN50 2 inches and under to suit specified piping system end connection
and maintenance requirements. Flange faces must have concentric serrated finish.
Body to cover connection must be [union] [gasketed-bolted] type.
Body and bonnet assembly must be [cast steel] [forged carbon steel]. Cast steel must conform to ASTM A 216/A 216M
, Grade WCB. Forged carbon steel must conform to ASTM A 105/A 105M.
Trim materials, including hinge pin, must be manufacturer's standard corrosion-resistant alloys for the specified
service.
2.2.3.2 900 kPa125 psi
Rate valves 900 kilopascal 125-psi wsp and standard horizontal swing type and ensure conformance to MSS SP-80
, MSS SP-86,swing check, 900 kilopascal. 125-pound.
Body end connections must be flanged for all valves larger than DN50 2 inches and screwed in sizes DN50 2 inches
and under.
Body to cover connection in sizes larger than DN50 2 inches
must be gasketed-bolted type, and valve body must be [cast iron, conforming to ASTM A 126, Class B] [Class 1
[ Class 1, at 178 degrees C; 1379 kilopascal125-psig, wsp at 353 degrees F; 200-psig water, oil and gas (wog),
nonshock] valves conforming to MSS SP-70]. Flanges must conform to ASME B16.1.
Swing-check pin must be corrosion-resistant [steel] [bronze] [brass]. Swing check angle of closure must be manufacturer's
standard, unless a specific angle is indicated.
Valve disk must be [regrindable metal] [renewable composition] type.
2.2.3.3 Manual Radiator Valves
NOTE: The following paragraph applies to steam and hot water systems.
Valves to control heating using medium heating element must be packless type, metallic diaphragm seal, using
MSS SP-86 (FS A-A-50457, Type II, Style D) conforming to FS A-A-50457, Type II, Style D metallic diaphragm seal
.
2.2.4 Cone-Plug Balancing Valve (CPBV)
Cone-plug balancing valves in sizes through DN32 1-1/4 inches
must be thread end, conforming to ASME B1.20.1 and ASME B1.20.1M, and must be rated for service at not less than
1207 kilopascal at 121 degrees C 175 psi at 250 degrees F. Valve body and components must be [ASTM B 61 bronze]
[manufacturer's equal-strength brass materials]. Valve plug must be swivel-type contoured cone and not rattle
or make noise in service at any balancing position. Valve must have high temperature, service-rated packing,
with bushing in bottom of gland and gland adjustment. Fit valves with a memory device which permits a valve
set at a balance point to be opened or closed but not opened beyond the balance point. Valve must be nonrising
stem type. Where used for combination shutoff and balancing service, furnish valve with insulating composition
handle.
2.2.5 Eccentric Plug Valves (EPV)
NOTE: Review service temperature range of dual temperature systems prior to
making selection and restrict to temperatures and materials to ensure long elastomer
life.
[Eccentric plug valves in sizes DN50 2 inches and smaller must be constructed of manufacturer's standard [brass]
[bronze] materials conforming to [ASTM B 61] [ASTM B 62]. Rate valves for service at1207 kilopascal 175-psi
maximum nonshock pressure at 121 degrees C 250 degrees F. Valve body must have screwed ends. Eccentric plug
surfaces in contact with flow and be coated with a 60 to 70 Shore A durometer hardness elastomer, resistant to
treated water. Fit valves used for combination shutoff and balancing service with a memory device or mechanism
which permits a valve set at a balance point to be operated to the closed position.]
[Reopening, limited to eccentric plug valves in sizes DN65 2-1/2 inches and larger, must be constructed of Type
2 nickel-alloy iron conforming to ASTM A 436. Rate valves for service at 1207 kilopascal 175-psi maximum nonshock
pressure at 121 degrees C. 250 degrees F. Valve body must have screwed ends. Eccentric plug surfaces must be
coated with a 60 to 70 Shore A durometer hardness elastomer, resistant to treated water. Fit valves used for
combination shutoff and balancing service with a memory device. Memory device or mechanism must permit a valve
set at a balance point to be operated to the closed position, but with reopening limited to the balance point.
Fit valves up to DN150 6-inch ips with removable lever operator.]
NOTE: Normally delete the following paragraphs. Limit to DN125 5-inch valves.
Cross sectional area of valve bore, when open, shall equal pipe inlet area.
[Valves, DN150 6-inch nps and larger, must be fitted with totally enclosed, flood-lubricated, worm-gear drive;
operating torque must not exceed 68 newton meter 50 foot-pounds.]
PART 3 EXECUTION
3.1 INSTALLATION
Install valves in accordance with the manufacturer's recommendations and in accordance with the applicable requirements
of Section 23 05 15 COMMON PIPING FOR HVAC.