What is the main reason for the failure of the sealing performance of the single eccentric sealing butterfly valve?

The main reasons for the failure of the sealing performance:

1. During the opening and closing process of the butterfly valve, when the valve plate rotates and squeezes the elastic soft valve seat, the valve disc and the valve seat are mechanically worn and scratched;

2. After the valve disc squeezes the elastic valve seat, the elastic valve seat or the elastic layer of the valve disc produces permanent plastic deformation, cold flow, elastic failure, etc.;

3. The material of the elastic valve seat or the elastic layer of the valve plate is aging and failing, etc.;

4. Medium cavitation and erosion of the sealing surface.

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