It is installed in the pipeline to prevent the reverse flow of the medium causing the reverse rotation of the water pump and motor, or to prevent the medium from flowing back to the container;

The utility model relates to an automatic valve, which is opened and closed by the pressure of the medium itself;

When the valve is fully opened, the flow performance is good, the fluid resistance is small, and the pressure (head) loss is small;

Rubber disc check valve rubber plate mold molding, good interchangeability, rubber plate can be replaced;

It is suitable for water supply and drainage, heating, sewage treatment, gas, electricity, metallurgy, petroleum, chemical industry, light textile, mining, urban construction and fire protection industries.