JD745X diaphragm multi-function pump control valve is an intelligent valve installed at the pump outlet of the water supply system of high-rise buildings and other water supply systems to prevent media backflow, water hammer and water hammer phenomenon. JD745X diaphragm multi-function water pump control valve combines three functions: electric valve, check valve and water hammer eliminator, which can effectively improve the safety and reliability of the water supply system. And the technical principle of slow opening, fast closing and slow closing to eliminate water hammer is integrated to prevent the generation of water hammer in the pump and water hammer when the pump is stopped. Only need to operate the pump motor to open the button, the valve can automatically realize the opening and closing in accordance with the pump operating procedures, with large flow and small pressure loss. The diaphragm type is suitable for valves below T600 caliber.