Analysis of Characteristics of Soft Seal Butterfly Valve1

Analysis of the characteristics of soft-seal butterfly valve ground application. In the known butterfly valve technology, the sealing form mostly adopts the sealing structure, and the sealing material is rubber, polytetrafluoroethylene, etc. Due to the limitation of structural characteristics, it is not suitable for industries such as high temperature resistance, high pressure, corrosion resistance and wear resistance. One of the more advanced butterfly valves is a metal hard-sealed butterfly valve with a triple eccentric mechanical seal. The valve body and the valve seat are connected components, and the sealing surface layer of the valve seat is surfacing with temperature-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 printing and dyeing mechanical seal, this butterfly valve has high temperature resistance, easy operation, no friction when opening and closing, and compensates the seal with the increase of the torque of the transmission mechanism when closing. The sealing performance of the butterfly valve and the advantages of prolonging the service life are improved. Features of soft-sealed butterfly valve: 1. Soft-sealed butterfly valve is small and light, easy to disassemble and maintain, and can be installed in any position. 2. The structure is simple and compact, the operating torque is small, and the 90-degree rotation can be opened quickly. 3. The flow characteristics tend to be straight, and the adjustment performance is good. 4. The connection between the butterfly plate and the valve stem adopts a pin-free structure, which overcomes the possible internal leakage point. 5. The seals of the soft-sealed butterfly valve can be replaced, and the sealing is reliable and can achieve two-way sealing. 6. The butterfly plate can be sprayed with coating according to user requirements, such as nylon or PTFE. 7. The soft sealing butterfly valve can be designed as flange connection and wafer connection. 8. The drive mode of the soft-sealed butterfly valve can be manual, electric or pneumatic.