Bronze Double Door Check Valve

Check valve is to rely on the flow of the medium itself and automatically open and close valve disc, used to prevent the media flow back valve, also known as check valve, one-way valve, countercurrent valve, and back pressure valve.  Check valve is a kind of automatic valve, its main function is to prevent media backflow, prevent pump and drive motor reverse, as well as the discharge of container medium.  Check valves can also be used to supply lines in which pressure may rise to exceed system pressure in the auxiliary system.  Check valves can be divided into swing check valves (rotating according to the center of gravity) and lifting check valves (moving along the axis). 

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Material:

The body materia: GG25/GGG40/GGG50/Cast iron/Ductile iron/WCB/Bronze

The disc material: DI/SS304/SS316/AL-BRZ

The stem/spring material: SS416/SS304

The seat material:NBR/EPDM/VITON

Standard：

ANSI/JIS/DIN/BS

Usage：

They are used for pipe of transporting water with such medium as water sewage and seawater.It can avoid media flowing backwards and prevent damaging water hammer,guarantee the safety using of pipes.