Spirax Sarco’s DCV wafer check valves can be used in a wide variety of applications including hot and cold water systems, process line sprinkler installations and in steam and condensate lines. Installed in ‘reverse’ mode, the DCV will act as a vacuum breaker preventing any back syphoning of liquids damaging upstream equipment when the steam supply is turned off and the equipment cools.
The valves provide an effective minimal maintenance-free solution for the prevention of reverse flow in pipelines carrying most types of liquids, steam and gases. Designed to fit between two pipeline flanges, they provide a compact installation when compared size for size with conventional swing and lift type check valves. They are available in a wide range of body materials from bronze to stainless steel with seating options of stainless steel, viton or EPDM to suit most applications.
Various spring options are available including high temperature and heavy duty springs for boiler or gravity feed line applications. When boilers are shut-down and steam pressure lost, the head of water above the pump can cause flow through the pump flooding the boiler. The DCV2B fitted with a heavy duty spring and installed after the feed pump will prevent any gravity flow.
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