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.

Although the pneumatic butterfly valve can be used as a regulating valve, it cannot be used to regulate the flow of slurry with a large number of solid particles. Since the valve disc is always in the slurry fluid, throttling with the valve disc will not only wear the valve disc easily, but also quickly wear the rubber liner at its downstream side, especially in the pipeline with high flow rate, especially when the valve is closed. Therefore, butterfly valves are used as shut-off valves on most slurry pipelines.