Product characteristics
The check valve is composed of main valve and external control valve. There are two water chambers in the main valve, and the diaphragm water chamber is a pressure regulating chamber. When the water pump stops working, due to the self weight of the valve disc, the force of the main valve spring and the pressure difference force between the upper chamber and the lower chamber (when the water pump stops working, the pressure in the lower chamber decreases rapidly, but the pressure in the upper chamber decreases relatively slowly), the valve plate is closed 90% quickly, and the remaining 10% is transmitted to the upper chamber by the guide pipe. With the increase of the pressure in the upper chamber, the valve flap is picked up to close the closure port The remaining 10% of the opening plays a role of slowing down noise and reducing water hammer.