Electric double eccentric butterfly valve, also known as electric high-performance butterfly valve, is a new type of butterfly valve that combines the advantages of various butterfly valve structures and further improves the design. The outer periphery of the butterfly plate and the sealing valve seat of the valve are processed into a hemispherical shape, relying on the outer spherical surface of the butterfly plate to compress the inner spherical surface of the sealing valve seat, producing elastic deformation and achieving the purpose of tightness. The design of its structural features enables the butterfly plate to quickly detach from the valve seat after the valve is opened, greatly eliminating excessive compression and scratching between the butterfly plate and the valve seat, reducing the opening resistance distance, reducing wear, and improving the service life of the valve seat.

1. The single PTFE elastic valve seat sealing structure achieves dynamic sealing through system pressure, which is durable and highly reliable;

2. Reliable sealing can be maintained without the need for additional sealing rings or metal components;

3. Capable of operating a bi-directional leak free seal;

4. The lip seal design compensates for temperature and pressure changes during use;

5. The valve seat does not come into contact with the butterfly plate when in the open and middle positions.

6. Easy to maintain, simply remove the pressure plate to replace the valve seat, without the need to disassemble the disc and shaft.

The structural feature of the electric double eccentric butterfly valve is that the valve stem axis deviates from both the center of the butterfly plate and the center of the body. The double eccentric effect enables the butterfly plate to quickly detach from the valve seat after the valve is opened, greatly eliminating unnecessary excessive compression and scratching between the butterfly plate and the valve seat, reducing the opening distance, reducing wear, and improving the service life of the valve seat. The outside of the valve seat is a movable insert, and the tighter the flange clamp and the greater the pressure, the better the sealing performance. Replacing the valve seat is convenient and simple. Simply remove the insert to remove the valve seat, without the need to disassemble the valve plate and shaft. Adopting a double eccentric butterfly plate with a spherical sealing surface and a single flexible lip seal seat, it is suitable for occasions that require reliable sealing and good adjustment characteristics.

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