(SFCV) Rubber disc check valve is mainly composed of valve body, valve cover and rubber disc. The rubber flap is made of steel plate, steel bar and reinforced nylon cloth as the substrate, and the outer layer is covered with rubber. The service life of the valve flap switch can reach 1 million times. The valve is designed with full flow area type, which has the characteristics of small head loss, not easy to accumulate sundries and easy to maintain. The valve is mainly suitable for the water supply and drainage system, and can be installed at the water outlet of the water pump to prevent backflow and water hammer damage to the pump. The valve can also be installed on the bypass pipe of the water inlet and outlet pipes of the reservoir to prevent the backflow of the pool water into the water supply system.