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AWWA C518

Double-Disc Swing- Check Valves for Waterworks Service, 2-in. Through 48-in. (50-mm Through 1,200-mm) NPS

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Organization: AWWA
Publication Date: 24 October 2018
Status: active
Page Count: 36
scope:

This standard establishes minimum requirements for double-disc swingcheck valves, 2-in. (50-mm) through 48-in. (1,200-mm) NPS, with various body and end types for raw, potable, and reclaimed water having a pH range from 6 to 12 and a temperature range of 33-125°F (0.6-52°C).

Body types. Valves described in this standard are provided with wafer or threaded-lug ends for installation between ANSI Class 125 flanges or grooved ends for use with IPS pressure pipe.

Gray-iron pressure ratings. The minimum design working water pressure for gray-iron valves shall be 200 psig (1,380 kPa) for 2-in. through 12-in. (50-mm through 300-mm) NPS inclusive and 150 psig (1,030 kPa) for 14-in. through 48-in. (350-mm through 1,200-mm) NPS inclusive.

Ductile-iron pressure ratings. The minimum design working water pressure for ductile-iron valves shall be 250 psig (1,720 kPa) for 2-in. through 48-in. (50-mm through 1,200-mm) NPS inclusive

Fluid velocity rating. The maximum fluid velocity shall be 16 ft/s (4.9 m/s).

Installations. Double-disc swing-check valves are designed for installation in horizontal pipelines and in vertical lines with flow in the upward direction. Valves must be installed with hinge pins in the vertical position for horizontal pipeline installations.

Excepted conditions. Conditions of water hammer, hydraulic pulsation, and excessive noise are beyond the scope of this standard and require special design and construction consideration.

Purpose

The purpose of this standard is to provide the minimum requirements for double-disc swing-check valves, suitable for waterworks service, 2-in. through 48-in. (50-mm through 1,200-mm) NPS, including materials and testing.

 

 

 

 

Document History

AWWA C518
October 24, 2018
Double-Disc Swing- Check Valves for Waterworks Service, 2-in. Through 48-in. (50-mm Through 1,200-mm) NPS
This standard establishes minimum requirements for double-disc swingcheck valves, 2-in. (50-mm) through 48-in. (1,200-mm) NPS, with various body and end types for raw, potable, and reclaimed water...
January 20, 2013
Dual-Disc Swing-Check Valves for Waterworks Service
This standard establishes minimum requirements for dual-disc swing-check valves, 2-in. (50-mm) through 48-in. (1,200-mm) NPS for clean water having a pH range from 6 to 10 and a temperature range of...
January 27, 2008
Dual-Disc Swing- Check Valves for Waterworks Service
This standard establishes minimum requirements for dual-disc swing-check valves, 2-in. (50-mm) through 48-in. (1,200-mm) NPS for clean water having a pH range from 6 to 10 and a temperature range of...

References

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