Description of the sealing structure of the vacuum butterfly valve

When the vacuum butterfly valve closes the valve, the driving device drives the valve shaft to rotate at 90°, and the butterfly plate rotates synchronously through the connecting pin, and the main sealing ring of the elastic butterfly valve installed in the outer edge groove of the butterfly plate gradually contacts with the valve body sealing seat, because of The diameter is larger than the diameter of the valve body sealing seat, and the main sealing ring is uniformly deformed by the extrusion, and the elasticity is closely matched with the sealing body of the valve body.

Its unique sealing structure enables the main sealing ring of the butterfly valve to increase with the pressure of the working medium, and increases outward with a specific ratio of pressure, which not only automatically compensates the sealing specific pressure required for sealing, but also does not cause too tight pressure. When the butterfly valve is opened, the sealing surface is scratched to achieve a good sealing effect.