Piston multifunctional pump control valve is installed in a large-diameter water supply network system pump outlet to prevent backflow media, water hammer and water hammer phenomenon intelligent valves This valve combines electric valve, check valve and water hammer eliminator three functions, which can effectively improve the safety and reliability of the water supply system. Dual chamber, dual valve structure can quickly close the valve after the pump stops at 90% (to prevent backflow medium pumps cause reverse), and then slowly close the remaining 10% (eliminating destructive water hammer) reliable piston valve performance, high strength smooth action, to prevent water pump eased water hammer occasions. Just pump motor hoist operation button, you can automatically open and close valves in accordance with the rules pumps, flow, pressure loss.