working principle

The water force is used to control the main valve to close the opening height by 90%, and then the stroke switch controls the water pump to lag off, and then the main valve is closed, which has the function of the medium check protection pump.

Characteristics

It has four functions: stop valve, check valve, electric valve and water hammer canceller. It is especially suitable for supporting dynamic control system. It does not need electrical controller and external power, and automatically opens and closes according to the routine. It has three functions of preventing and eliminating water hammer, which can effectively improve system safety. reliability. Meet the requirements of system engineering equipment automation control.