Butterfly valve is a common valve that can be used for regulating performance, and it is widely used in today's valve applications. The most common fault of butterfly valve in use is that the sealing surface is easy to leak. What measures should we take to prevent the butterfly valve from leaking?

1. Ensure the clearance between the sealing surfaces. Since the sealing between the rubber seal ring and the sealing surface is achieved by an appropriate interference, the minimum interference of the seal should be the basis for measuring the quality of the butterfly valve, so the minimum interference must meet the design requirements.

2. Ensure that the processing quality of the sealing surface of the butterfly plate reaches the contact precision with the sealing ring. Because the rougher the sealing surface, the faster the rubber sealing ring will wear.

3. The sealing ring material should meet the requirements. The performance index of rubber material is the key condition to determine the application scope of sealing ring and the important factor to determine the service life of butterfly valve. Therefore, the material, geometric dimension and accuracy grade of the seal ring should meet the design requirements.

4. During installation, maintenance and overhaul, ensure that the interference and sealing surface are not damaged to ensure the sealing performance of the butterfly valve.

Through the analysis of the leakage of the rubber sealing surface of butterfly valves, the effective way to ensure the long-term normal operation of various butterfly valves in the pipeline system without leakage is to select a reasonable butterfly valve sealing structure. Through actual use, the sealing performance of the midline butterfly valve is relatively ideal, superior to other similar products. Good results can be achieved in operation.