Rubber flap water check valve is mainly composed of valve body, valve cover, rubber flap and other components. When the medium is flowing forward, the pressure generated by the medium pushes the rubber flap to open, so that the medium can smoothly pass through the non return valve and flow to the target direction. When the medium has a reverse flow trend, the reverse pressure of the medium will make the rubber flap close quickly and tightly fit on the valve seat, thereby preventing the medium from countercurrent and ensuring that the medium in the pipeline flows in only one direction.

Rubber flap check valve offer many advantages over regular check valves:

1.Good sealing performance

The rubber flap has good elasticity and flexibility, and can be closely fitted with the seat to effectively prevent media leakage, and the sealing effect is better than that of some metal fitting check valve.

2.Low water resistance

The rubber flap can better follow the direction of water flow when it is opened, and its shape and material make the resistance of water flow through is small, which can reduce energy loss and improve the operation efficiency of the pipeline system.

3.Good mute effect

The rubber material has certain shock absorption and noise reduction performance, and can reduce the phenomenon of water shock and noise when the non return check valve is closed, and create a relatively quiet operating environment for the system.

4.Corrosion resistance

Rubber has good corrosion resistance, can adapt to a variety of different nature of the medium, not easy to be corroded by acid and alkali and other corrosive media, extend the service life of the cast iron check valve.

Rubber check valves are often used in water supply and drainage systems, sewage treatment plants, pumping stations, fire systems and other fields. In the water supply and drainage system, the backflow of water can be prevented to ensure the stability and safety of water supply. In the sewage treatment plant, it can ensure that the sewage flows in the specified direction in the treatment process, and avoid the mixing of sewage in different treatment stages, which affects the treatment effect.

In the pump station, it can effectively prevent the water flow back when the shutdown, and protect the pump and other equipment from damage. In the fire fighting system, its reliable check performance can ensure that the fire water can be smoothly supplied when needed to ensure the smooth progress of fire fighting work.（Jinbin Valve）