Quick closing butterfly valve is not only simple structure, small volume, light weight, material consumption saving, small installation size, and drive torque is small, easy to operate, fast, and also has a good flow regulation function and closed sealing characteristics, in the large and medium-sized diameter butterfly valve is the dominant valve form.

In recent years, the metal sealing butterfly valve has developed rapidly, with high temperature resistant, resistant to low temperature, strong corrosion resistance, strong erosion resistance, high strength alloy material in the application of electric butterfly valve, make the metal sealing butterfly valve under high temperature, low temperature, strong erosion has been widely used, such as operating conditions and partly replace the cut-off valve, gate valve and ball valve.