What is a Piston Check Valve?


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What is a Piston Check Valve?

A piston check valve is self actuated ,one way valve,essentially a lift type check valve which allows flow in one direction only.This valve is also Non-return Valve (NRV).

Construction and Operation of Piston Check Valve

Construction of the seat and disk of a piston check valve is the same as for lift check valves. Main component of piston check valve is its dashpot. Dashpot of piston check valve consists of a piston and cylinder that provides a cushioning effect during operation. As the design of piston check valve is similar to lift check valve, the flow characteristics through a piston check valve are also same as through a lift check valve. Installation of this NRV(non-return valve) is the same as for a lift check in that the flow must enter from under the valve seat.

What is a Piston Check Valve