Product introduction FLOWSPEC JD745X diaphragm type multi-function pump control valve is one type of intelligent valve which is applicable to the pump outlet of high building water supply system and other water supply system to prevent of water backflow, water hammer and water attack. JD745X diaphragm type multi-function pump control valve combines three functions, including electric valve, non-return valve and water hammer eliminator, so it can improve effectively the water supply system safety and reliability. JD745X diaphragm type multi-function pump control valve integrates slow opening, slow closing and water hammer eliminating technical principles to prevent of pump start water hammer and pump stop water hammer. Just only needing operate the pump motor open and close button to achieve automatically the valve open and close according to the pump operating instructions. JD745X diaphragm type multi-function pump control valve has big flow but less pressure loss.