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A.VALVE TYPE A1:
Isolation/service valves used for steam/condensate service in ¼” – 2” pipe sizes, shall be screwed end, gate type. For steam/condensate service 80 psi & above, valve shall be all bronze, 300# heavy duty or industrial service rated, with solid wedge disc, non-rising stem and stainless steel seat. Threaded pipe and fittings shall be coated with Teflon impregnated never-seize, on male threads only, prior to assembly.
B.VALVE TYPE A2:
Isolation/service valves used for steam/condensate service in ¼” – 2” pipe sizes, shall be screwed end, gate type. For steam/condensate service below 80 psi, valve shall be all bronze, 150# heavy duty or industrial service rated, with solid wedge disc and non-rising stem. Threaded pipe and fittings shall be coated with Teflon impregnated never-seize, on male threads only, prior to assembly.
C.VALVE TYPE B1:
Isolation/service valves for steam/condensate service in 2-½” – 12” pipe sizes, shall be flanged end, gate type. For steam/condensate service 80 psi & above, valve shall be 300# cast steel, carbon steel or forged steel (heavy duty or industrial service rated), with rising or non-rising stem. Flange gaskets shall be metallic type suitable for raised face or flat face flanges as applicable, equal to Flexitallic brand. Bolts or studs, of Grade 5 or better, are to be full sized per valve manufacturer to fully fit the flange hole. Threads shall be coated with Teflon impregnated never-seize, and installed bolt shall have a maximum of 2-4 threads showing when valve flanges are pulled down to recommended torque.
D.VALVE TYPE B2:
Isolation/service valves for steam/condensate service in 2-½” – 12” pipe sizes, shall be flanged end, gate type. For steam/condensate service below 80 psi, valve shall be 150# cast steel, carbon steel or forged steel (heavy duty or industrial service rated), with rising or non-rising stem. Flange gaskets shall be metallic type suitable for raised face or flat face flanges as applicable, equal to Flexitallic brand. Bolts or studs, of Grade 5 or better, are to be full sized per valve manufacturer to fully fit the flange hole. Threads shall be coated with Teflon impregnated never-seize, and installed bolt shall have a maximum of 2-4 threads showing when valve flanges are pulled down to recommended torque.
E.VALVE TYPE C1:
Special…Consult with Facilities Services for bubble tight valve spec.
F.VALVE TYPE C2:
Special…Consult with Facilities Services for bubble tight valve spec.
G.VALVE TYPE D1:
Isolation/service valves used throughout domestic water system shall be full port ball type. For valves ¼” - 3” operating 125 psi & above, use 300# class, stainless steel, ball valves with threaded ends. Provide stem extensions, as necessary, to accommodate piping insulation.
H.VALVE TYPE D2:
Isolation/service valves used throughout domestic water system shall be full port ball type. For valves ¼” - 3” operating below 125 psi, use 600 WOG – 150 SWP class, forged brass, ball valves with threaded ends. Provide stem extensions, as necessary, to accommodate piping insulation.
I.VALVE TYPE E1:
Isolation/service valves used throughout domestic water system shall be full port ball type. For valves 4” and larger, operating 125 psi & above, use 300# class, stainless steel, flanged ball valves suitable for potable water service.
J.VALVE TYPE E2:
Isolation/service valves used throughout domestic water system shall be full port ball type. For valves 4” and larger, operating below 125 psi, 125# class, epoxy coated cast iron or 150# class, stainless steel, flanged ball valves suitable for potable water service.
K. VALVE TYPE F1:
Isolation/service valves used chilled water (12” & up) and condenser water (4” & up) shall be 200#, industrial duty butterfly valve, cast/ductile iron, lug type body, with 316 stainless steel disc, and EPDM sleeve/seal/seat materials. Provide manual gear operator for valves 6” and above.
see also : STEAM / CONDENSATE SYSTEMS VALVES
