The valve is mainly used at the pump outlet of water supply and drainage system, petroleum, chemical industry and other industrial pipelines to prevent the damage of medium backflow and water hammer to the pump. The valve is also used to install on the inlet and outlet pipes of the pool, water tank and water tower to prevent water from flowing back into the system.

The rubber flap check valve is mainly composed of the valve body, valve cover, rubber flap and middle flange gasket. The rubber flap is made of steel plate and reinforced nylon cloth as the substrate, and the outer layer is completely covered with rubber.

The seal adopts inclined design, so as to improve the sealing performance when closing. It also has the characteristics of large overflow, small head loss, difficult accumulation of debris, and convenient maintenance.