2.3.3.1
MSS SP-80, Class 862 125, except sizes 65 mm 2.5 inches and larger shall
conform to MSS SP-70, Class 862 125.
2.3.3.2
Globe and Angle Valves
MSS SP-80, Class 862 125, except sizes 65 mm 2.5 inches and larger shall
conform to MSS SP-85, Class 862 125.
2.3.3.3
Check Valves
MSS SP-80, Class 862 125, swing check; except sizes 65 mm 2.5 inches and
larger shall conform to MSS SP-71, Class 862 125.
2.3.3.4
MSS SP-67, except sizes 65 mm 2.5 inches and larger shall have lugged or
wafer body designed for installation between ASME Class 1034 150 flanges.
Valves shall have two-position lever handles.
2.3.3.5
Full port design, copper alloy body, except sizes 65 mm 2.5 inchesand
larger shall be cast-iron body. Valves shall have two-position lever
handles unless indicated otherwise. Ball valves may be provided in lieu of
butterfly valves and gate valves.
2.3.3.6
Vent Valves
Provide manual vent valves designed to be operated manually with
screwdriver or thumbscrew, 6 mm 1/8 inch NPS connection. The valve
material shall be compatible with the working fluid (antifreeze).
2.3.3.7
Water Relief Valves
Provide water relief valves as indicated, and in accordance with ASME BPVC.
Bronze body, test level, ASME rated. Pressure relief at 207 kPa 30 psi.
2.3.4
Specialty Valves
2.3.4.1
Combination Pressure and Temperature Relief Valves
ANSI Z21.22, copper alloy body, automatic reseating, with test lever.
Discharge capacity pressure relief setting shall be 862 kPa 125 psi and
temperature setting of 85 degrees C 210 degrees F based on AGA temperature
steam rating.
2.3.4.2
Water Pressure Reducing Valves
ASSE 1003, copper alloy body, automatic reseating, with test lever.
2.3.4.3
Water Temperature Regulating Valves
Provide copper alloy body, direct acting, pilot operated, for the intended
service.
SECTION 15741N
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