recommended by the manufacturer for the conditions indicated.]
[Provide motor operator where indicated.]
2.7.3.2
Globe and Angle Valves
a.
Bronze globe and angle valves: MSS SP-80, Class 150, 50 mm 2
inches and smaller, Class 200, except that Class 150 valves with
brazed ends may be used for copper tubing. Valves shall have
renewable seats and discs except brazed-end valves which shall
have integral seats.
b.
Steel globe and angle valves: MSS SP-84, 50 mm 2 inches and
smaller, ASME B16.34, over 50 mm 2 inches, flanged ends, [Class
150.] [As recommended by the manufacturer for the conditions
indicated.] [Provide motor operator where indicated.]
2.7.3.3
Pressure Reducing Valves
NFLPA T3.12.3 R2, with nominal pressure rating of not less than inlet
system pressure indicated. Provide pressure reducing valves capable of
being adjusted to specified flow and pressure, and suitable for intended
service. Provide pilot valve for dome loaded type if required for proper
operation.
2.7.3.4
Safety Valves
ASME BPVC SEC VIII D1 and ASME BPVC SEC IX Code stamped safety valve), 862
kPa (gage) 125 psig, for unfired pressure vessels, bronze, with threaded or
flanged connections; factory set and sealed.
2.7.3.5
Check Valves
MSS SP-80, Bronze body with brazed joint or threaded ends or steel body
with flanged end, ASME B16.34, or threaded ends, MSS SP-84. The check
valve shall have a perforated piston with closed downstream end, in line
with the pipe and held closed by a steel poppet return spring.
2.7.3.6
Diaphragm type, air loaded, tight closing single seat, brass body [with
integral filter and bowl]. [Pressure regulators used to deliver compressed
air for cleaning shall be factory set at not more than 207 kPa (gage) 30
psig and shall be nonadjustable.]
2.7.3.7
One-piece bodies with integral or screwed bonnet, stems of hardened
stainless steel with fine thread for metering and ease of adjusting, teflon
packing; and shall be of the pressure balanced type. Needle valves shall
be of the slow opening type.
2.7.3.8
Full port design, copper alloy body, except sizes 65 mm2.5 inches and
larger shall be ANSI Class 150 steel-bodied. Valves shall have
two-position lever handles.
SECTION 15211N
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