The water pump outlet used in high-rise buildings or other water supply systems can prevent medium backflow and reduce water hammer phenomenon, achieving a safe and quiet effect. 
Features: 
It can prevent the occurrence of water hammer and water hammer, achieve the effect of slow closing and noise reduction, and is a check valve that can regulate the opening and closing speed. When the water pump starts or stops, it can be adjusted on-site to the optimal opening or closing speed. 
Principle: 
After stopping the pump, the medium flows back, and the pressure in the upper chamber of the valve is greater than that in the lower chamber, causing the valve disc to fall and close. As long as the speed of the return water entering the upper chamber of the diaphragm is controlled, the closing speed of the valve can be adjusted to achieve the purpose of slow closing.