Pipe and fitting sizes shall be as indicated on the Drawings.
PVC valve bodies and fittings shall be Schedule 80, ASTM D1785, Type 1, Grade
1. Fittings shall be socket ends, ASTM D2467.
All flange hardware shall be stainless steel. Flange gaskets shall be 14-inch Viton,
full face.
2.2 VALVES
A.
Ball valves shall be true union design with socketed connections. Pressure
rating shall be 150 psig, Type I, Grade I PVC construction with Viton or PVDF
seats and seals. Full port opening. Asahi-America or approved equal.
Butterfly valves shall be wafer or flange type, constructed of stainless steel or
PVC. Valves shall have Viton seats and Viton packing. CONTRACTOR shall
provide inserts, as required, to allow for full opening of the valve. Pressure
rating shall be 150 psig at 75°F.
Flanged check valves shall be ANSI Class 150, swing-check style, with PVC body,
bonnet, and counterweight. Fasteners shall be Type 18-8, 304, or 316 stainless
steel. Seals shall be FKM. Check valves shall include an external stainless steel
spring assist. Asahi-America or approved equal.
Wafer-style check valves shall be ANSI Class 150, wafer style, with PVC body,
valve plates, and trim. Seals shall be Viton or Teflon. Check valves shall provide
leak-tight seal at 2 psi back pressure. Techno Corporation or approved equal.
PVC Gate valves shall be flanged or socketed. Stainless steel gate valves shall be
threaded. Rated for 150 psig to full vacuum. Seals shall be Viton or PVDF. Asahi-
America or approved equal.
Sample ports shall be nominal %-inch diameter stainless steel ball valves with
threaded connection to PVC leachate pipe. Seats and seals shall be PTFE. The
free end of the valve shall be supplied with a %-inch inner dimension hose barb
fitting.
2.3. VACUUM, AIR, AND PRESSURE VALVES
A.
All valves shall be dual air release/vacuum release valves. Air release and
vacuum relief valve shall be Crispin Model US20SB with an orifice diameter of
0.25 inches designed for domestic sewer use for inflow/outflow of up to 98 scfm.
Air release and vacuum relief valves shall allow entry of air when operating
pressure is below atmospheric pressure. The valve shall also allow release of air
from the pipe when the pipe is filling and under pressure. The valve shall close
File No. 3066.09 Sump Riser Building Pipe, Fittings, and Appurtenances 15310- 2 of 7 December 2017
