Butterfly Valve
The original butterfly valve is a simple flapper valve that does not close tightly. Usually used as flow regulating valve and damping valve in water pipeline system. With the application of chemically resistant synthetic rubber to butterfly valves, the performance of butterfly valves can be improved. Because synthetic rubber has the characteristics of corrosion resistance, erosion resistance, dimensional stability, good resilience, easy forming, low cost, etc., synthetic rubber with different properties can be selected according to different use requirements to meet the operating conditions of the butterfly valve. It is widely used in the manufacture of butterfly valve lining and elastic valve seat.
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 also be filled and added with appropriate materials to improve its overall performance, resulting in better strength, The butterfly valve sealing material with lower friction coefficient overcomes some of 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 butterfly valve The performance has been further improved, and the butterfly valve with a wider temperature and pressure range, sealing performance and longer service life has appeared. In order to meet the requirements of industrial applications such as high and low temperature, strong erosion, long life, etc., the metal sealing butterfly valve has been greatly developed in the past ten years. With the application of high temperature resistance, low temperature resistance, strong corrosion resistance, strong erosion resistance, and high strength alloy materials in butterfly valves, metal sealed butterfly valves have been widely used in high and low temperature, strong erosion, long life and other industrial fields. The emergence of butterfly valves with large diameter (9750mm), high pressure (2.2kN/cm2), and wide temperature range (-102～606℃) has brought the technology of butterfly valves to a whole new level.
