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This valve is intelligent valve,installed in the outlet of pump of big size pipe system,to prevent fluid flowing backwards, surges in pipeling and water hitting.It converge electric valve,check valve and anti-surges three functions.Can improve the safety in the system,It will close the medium immediately 90% by the dual chambers,and diaphragms (prevent the pump’backspin by the return medium), Afterwards close10%(anti-ruinous surges).Piston valve is reliable, high strength,operation smooth.If need prevent the start surge and stop surge just operate the start button of pump motor, the valve can automatically open and close according to the operating procedure with larger flow rate and little pressure loss.
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