Soft seal butterfly valve
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As a component used to cut off the pipeline system and control the flow, the soft-sealing butterfly valve has been widely used in many fields such as petroleum, chemical industry, metallurgy, and hydropower. In the known butterfly valve technology, its sealing form mostly adopts a sealing structure, and the sealing material is rubber, polytetrafluoroethylene, etc. Due to the limitations of structural features, it is not suitable for industries such as high temperature resistance, high pressure resistance, corrosion resistance, and wear resistance. An existing relatively advanced butterfly valve is a triple-eccentric metal hard-sealed butterfly valve. The valve body and the valve seat are connected components, and the sealing surface of the valve seat is surfacing with heat-resistant and corrosion-resistant alloy materials. The multi-layer soft stacked sealing ring is fixed on the valve plate. Compared with the traditional butterfly valve, this butterfly valve has high temperature resistance, easy operation, no friction when opening and closing, and the sealing is compensated with the increase of the torque of the transmission mechanism when closing, which improves the performance of the butterfly valve. The advantages of excellent sealing performance and extended service life.
As a component used to cut off the pipeline system and control the flow, the soft-sealing butterfly valve has been widely used in many fields such as petroleum, chemical industry, metallurgy, and hydropower. The butterfly plate of the soft seal butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0° and 90°. When the rotation reaches 90°, the valve is fully open. The characteristics of the new high-life stainless steel butterfly valve and the problems in the use of the butterfly valve. Soft-sealed butterfly valves can be divided into flange-type soft-sealed butterfly valves and wafer-type soft-sealed butterfly valves according to the connection method.
1. Small and light, easy to disassemble and maintain, and can be installed at any position.
2. The structure is simple and compact, the operating torque is small, and the 90-degree rotation opens quickly.
3. The flow characteristic tends to a straight line, and the adjustment performance is good.
4. The connection between the butterfly plate and the valve stem adopts a pinless structure, which overcomes possible internal leakage points.
5. The seal can be replaced, and the seal is reliable to achieve two-way seal.
6. The butterfly plate can be sprayed with a coating according to user requirements, such as nylon or PTFE.
7. The valve can be designed as flange connection and wafer connection.
8. The driving mode can be manual, electric or pneumatic.
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