a.
Push-On Joints:
ASTM D 3139 or ASTM F 477.
b.
Solvent Cement:
ASTM D 2564.
2.1.3
Pipe Hangers and Supports
MSS SP-58 and MSS SP-69.
2.1.4
Valves
2.1.4.1
Gate Valves
Gate valves shall withstand a working pressure of not less than 1.03 MPa
150 psi. Valves shall have a clear waterway equal to the full diameter of
the valve, and shall be opened by turning counterclockwise. The operating
nut or wheel handle shall have an arrow, cast in metal, indicating the
direction of opening. Valves for buried service shall be non-rising stem
(NRS), 50 mm 2 inch square nut operated with joints applicable to the pipe
or installation. Buried valves shall be furnished with extension stems
comprising socket, extension stem and operating nut, and shall be long
enough to bring operating nut to within 150 mm 6 inches of grade. One 1.2
m 4 foot "T" handle valve wrench shall be furnished for each quantity of
six buried valves. Gate valves which are exposed or installed inside shall
be outside screw and yoke (OS&Y), handwheel operated with flanged ends
unless otherwise indicated. Flanges shall not be buried. An approved pit
shall be provided for all flanged connections.
a.
Valves smaller than 75 mm 3 inches shall be all bronze and shall
conform to MSS SP-80, Type 1, Class 150.
b.
Valves 75 to 305 mm 3 to 12 inches in size shall be
resilient-seated gate valves conforming to AWWA C509.
c.
Valves 355 mm 14 inches and larger shall be iron body, bronze
mounted and shall conform to AWWA C500. Valves shall be the solid
wedge type. Valves shall be equipped with gearing to reduce
operating effort. Valves installed in horizontal lines in the
horizontal position with stems horizontal shall be equipped with
bronze track, roller and scrapers to support the weight of the
gate for its full length of travel. Valves installed in vertical
pipe lines with stems horizontal shall be fitted with slides to
assist the travel of the gate assembly.
2.1.4.2
Plug Valves
Plug valves shall be the eccentric type and shall withstand a minimum
working pressure of 1.03 MPa 150 psi. Flange valve ends shall conform to
ASME B16.1, Class 125. Mechanical or push-on type rubber gasket joint ends
shall conform to AWWA C110 and AWWA C111. Port area for valves shall be at
least 80 percent of full pipe area. Valve bodies, plugs or discs, seats,
shafts, shaft seals and actuators shall conform to AWWA C504. Valves shall
open counterclockwise and the operating nut or wheel shall have an arrow,
cast in metal, indicating the direction of opening. Valves shall meet all
performance, leakage, and hydrostatic test required by AWWA C504. On
request, the Contractor shall furnish a certified statement from the
manufacturer that proof-of-design tests were carried out as described in
AWWA C504 and all requirements were successfully met.
SECTION 11391
Page 13
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