Working principle of butterfly valve (1)

Butterfly valve is a kind of valve that uses disc type opening and closing parts to rotate about 90° alternately to open, close or adjust the flow of medium. The butterfly valve is simple in structure, small in size, light in weight, low in material consumption, small in installation size, small in driving torque, fast and rapid in operation, and can also have good flow regulation and closing and sealing characteristics at the same time. It is a gradual development in recent years. One of the valve varieties. The use of butterfly valves is very extensive. The variety and quantity of its use continues to expand, and is developing towards high temperature, high pressure, large diameter, high sealing, long life, excellent adjustment characteristics, and one valve with multiple functions. Its reliability and other performance indicators have reached a high level.

Synthetic rubber has the characteristics of corrosion resistance, erosion resistance, dimensional stability, good resilience, easy molding, low cost, etc., and different performance synthetic rubbers can be selected according to different use requirements, and the operating conditions of the series butterfly valve.

Because polytetrafluoroethylene (PTFE) has strong corrosion resistance, stable performance, not easy to age, low friction coefficient, easy to form, and stable in size, it can be filled and added with appropriate materials to improve its overall performance, resulting in better strength and friction The coefficient coefficient of the butterfly valve sealing material overcomes the limitations of synthetic rubber. Therefore, polymer materials represented by polytetrafluoroethylene and their filling modified materials have been widely used in butterfly valves, so that the performance of butterfly valves can be obtained. With further improvement, the temperature and pressure range is wider, and the sealing performance is reliable, replacing the continuous butterfly valve.