The sealing rubber ring is specially designed for slurry operating conditions. The two matching sealing rubber rings are assembled into the valve cavity. When the valve is closed, the rubber ring compresses the gate to form a seal; when the valve is opened, the two rubber rings are pressed against each other to form a seal.

When the valve change from open position to closed position, a gap is formed between the contact surfaces of the rubber rings, so that the medium blocking the valve in the rubber ring is removed, and discharged from the sewage outlet to the outside. When the gate is completely closed, the sealing surface of the rubber ring is in full contact with the gate, and the rubber ring structure provides the auxiliary sealing function again. The unique ring design allows the valve to provide a reliable seal when closed or opened, avoiding contact between metal parts and the liquid slurry.