Check Valve
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Check valve also named back flow valve,non return valve,back pressure valve and one way valve. 

It open and close automatic by the pressure of the flow medium in the pipe system.

and the main function of check valve is prevent the back flow of the medium,prevent the pump 

and it’s driving motor reverse,and also for the medium discharge of the container. 

Robinson valve supply the type of check valve included as follows, Lift check valve,Swing check valve,

butterfly type check valve,diaphragm type check valve, Ball type check valve,double disc check valve,

slow control check valve,silent check valve ect. 

Robinson Check valve,the size from DN40-DN1400,the pressure from 1.0Mpa-42Mpa, 

The connection can be flange,wafer,weld,threaded,ferrule,clip.