The butterfly valve not only has the function of cut-off, but also has the function of regulation. The butterfly valve can be opened and closed quickly and frequently. It is especially suitable for situations requiring quick opening or cutting off. Compared with gate valves, butterfly valves are small in size, light in weight and cheap in price. Under some conditions with limited installation space, wafer connected butterfly valves can be selected to save more space. Therefore, it can be made into a large diameter, and more butterfly valves above DN300 are used. The utility model can also be used for conveying unclean medium pipes containing small particles. However, the pressure and temperature range of pneumatic butterfly valve is small, and its sealing performance is not as good as that of gate valve. The price of butterfly valve with the same caliber is much lower than that of gate valve.

The principle, structure, standard and specification of the three eccentric butterfly valve can be introduced here, such as the principle, structure, standard, specification, pressure rating and connection type of the three eccentric butterfly valve