700X pump control valve is installed in the pump outlet to a high-rise buildings and other water supply system to prevent the media back of the check valve class. When the pump is about to stop before the water supply valve slowly closed about 90% in advance, to prevent a sudden stop the pump and produce water hammer and hit the sound of water, when the pump is completely stopped, and then the valve is fully closed, preventing the reflux pump out the water, the effective protection pumps, impact arising from the return of reversal. The product is essential to protect the pump outlet device. Valve was streamlined design, implementation and accurate guidance and control solenoid valves open and close by, the use of safe, reliable, efficient, and water to prevent water hammer banging sound, long life, easy installation and maintenance.