一、Structure and purpose

Used on the pump outlet of a water supply system to prevent medium’s back-flow．water hammer and water shock．combining three functions as an elec-tric valve，check valve and water hammer remove r，capable of effectively raisingsafety and reliability of the water supply system，integrating the technical principle of slow-open，speed valve，slow-close removing water hammer and preventing both pump-starting and pump-stopping water hammers from being formed The gate can automatically carry out open-close upon the operation rules of the water pump just by operating the pump t0 open or close electrically This valve features a big flow and a small pressure loss．reliable sealing performance，easy installation，debugging and maintenance and a long duration．

四、Schematic diagram of installation

Note：Either elastic seat ring sealed gate valve or butterfly valve can be selected in the schematic diagram of installation.Recomended to select the butterfly valve in case of≥DN350.