This standard describes only iron body, nonassisted, swing-check valves, 2-in.
through 24-in. (50-mm through 600-mm) NPS, with mechanical-joint or flanged
ends that are installed in approximately level settings in water systems. The manufacturer
should be consulted for special conditions. Check...
Back to AWWA C508-09 Swing-Check Valves for Waterworks Service, 2 In. Through 24 In. (50 mm Through 600 mm) NPS
This standard describes only iron body, nonassisted, swing-check valves, 2-in.
through 24-in. (50-mm through 600-mm) NPS, with mechanical-joint or flanged
ends that are installed in approximately level settings in water systems. The manufacturer
should be consulted for special conditions. Check valve sizes described in
this standard are 2-, 2 1/2-, 3-, 4-, 6-, 8-, 10-, 12-, 14-, 16-, 18-, 20-, and 24-in. (50-,
65-, 75-, 100-, 150-, 200-, 250-, 300-, 350-, 400-, 450-, 500-, and 600-mm) NPS.
Sizes refer to the nominal diameter of the waterway through the inlet and outlet
connections and the seat ring. Major revisions made to the standard in this edition
include the following:
the pressure ratings were revised in Sec. 1.1.4;
standard end-to-end dimensions were moved from the appendix to the
body of the standard in Sec. 4.4.2 and Table 2; new ductile-iron flange thicknesses were added to Sec. 4.4.7.1 and Table 3; and,
a new appendix titled "Installation, Operation, and Maintenance of Swing-
Check Valves for Waterworks Service" was added.