2.1.4.2
Ductile-Iron with Flanged Ends
AWWA C110 and AWWA C151 for not less than 1035 kPa 150 psi working pressure
unless otherwise shown or specified. Fittings shall have flanged ends per
AWWA C110. Specials and fittings shall be cement mortar lined in
accordance with AWWA C104. Linings shall be standard thickness.
2.1.4.3
Fittings for Screw-Joint Pipe
Malleable-iron, galvanized, 1034 kPa 150 psi, ASTM A 197/A 197M, threaded
ends, ASME B16.3.
2.1.4.4
Joints Inside Valve Chamber
All joints inside the valve chamber shall be flanged.
2.1.5
Valves
2.1.5.1
Gate valves shall be opened by turning counterclockwise. Valves 80 mm 3
inches and larger shall be iron body, brass mounted, conforming to AWWA C500.
Valves smaller than 80 mm 3 inches shall be all bronze and shall conform
to MSS SP-80, Type 1, class 150. Valves 80 mm 3 inches or larger located
in valve chambers shall be equipped with hand-operating wheels and shall be
flanged.
2.1.5.2
Butterfly Valves
Butterfly valves shall be opened by turning counterclockwise. Valves shall
conform to AWWA C504. Body and disc shall be cast iron, conforming to ASTM
A 48/A 48M. Shaft shall be 18-8 stainless steel. Resilient seat shall be
bonded to the valve body.
Butterfly valves shall be stainless steel to
rubber seated, tight closing type.
2.1.5.3
Check Valves
**************************************************************************
NOTE: Check valves as specified in AWWA C508 do not
include cushioning devices such as springs or
weighted arms.
**************************************************************************
Check valves shall be of the horizontal swing-check type, suitable for the
purpose and the operating conditions. The body shall be iron and shall
have a removable gate assembly and a cover removable for inspection. The
gate, gate seat, shaft, gate studs, and nuts shall be bronze or other
suitable alloy. Valves shall conform to AWWA C508.
2.1.5.4
Altitude Valve
**************************************************************************
NOTE: Altitude valves should be used only where
required in a system with differential pressures and
should be installed in a valve vault with
appropriate shut-off valves and check valve. The
size of the altitude valve will be inserted. In
general, for a pipe connection larger than 200 mm (8
inches) in diameter, the altitude valve may be one
SECTION 13209
Page 13
Previous Page
