Butterfly valve is a kind of valve which uses disc opening and closing parts to turn the flow of the medium around to open, close or adjust the traffic. Butterfly valve is not only simple structure, small size, light weight, material consumption, small installation size, small driving torque, easy to operate, rapid, and can also have good flow regulation function and close sealing characteristics, is one of the fastest growing valve varieties in the past more than 10 years. Butterfly valves are used in a wide range of uses. Its use of varieties and quantities continue to expand, and to high temperature, high pressure, large caliber, high sealing, long life, excellent adjustment characteristics, as well as a valve multi-functional development.
Its reliability and other performance indicators have reached a high level. With the application of chemical-resistant synthetic rubber on butterfly valve, the performance of butterfly valve can be improved.
Synthetic rubber has the characteristics of corrosion resistance, erosion resistance, dimensional stability, good resilience, easy forming, low cost and so on, and can choose different properties of synthetic rubber according to different use requirements, in order to meet the operating conditions of butterfly valve. Because PTFE (PTFE) has strong corrosion resistance, stable performance, not easy to aging, low coefficient of friction, easy to form, stable size, and can be filled, add appropriate materials to improve its comprehensive performance, get better strength, lower friction coefficient of butterfly valve sealing material, overcome the limitations of synthetic rubber, Therefore, the polymer polymerization material represented by PTFE and its filler modified material have been widely used in butterfly valve, so that the performance of butterfly valve has been further improved, and the manufacture of a more extensive temperature, pressure range, reliable sealing performance, longer service life butterfly valve.