Diaphragm type multifunctional pump control valve is installed at the outlet of pump in high building water supplying system and other to prevent backward flow, water-hammering, water-hitting. The valve have the function of the following valve: motorized valve, non return valve and water-hammering eliminator and can improve the safety in the system. The valve have slow-open, quick-close and slow-close function to prevent water-hammering when open or close pump. Only push the button for closing or opening pump and the valve can run according to the pump's operation procedure with large flow and little pressure loss.JD745X diaphragm type multifunctional pump control valve is for DN 600 or less valve.