The pneumatic switch ball valve is transformed from the rotary valve, but it only changes the shape of the rotary plug. Pneumatic switch ball valve has become a popular control switch, mainly used to control the flow of objects. This kind of ball valve is very convenient to open and close, small in size, and easy to maintain. More importantly, the physical and chemical properties of the pneumatic switch ball valve are very good, and it is not easy to be damaged by the external environment. Therefore, the pneumatic switch ball valve is widely used in all walks of life. 　　

Butterfly valves can be divided into offset plate type, vertical plate type, inclined plate type and lever type according to the structure. According to the sealing form, it can be divided into soft sealing type and hard sealing type. The soft seal type generally adopts rubber ring seal, and the hard seal type usually adopts metal ring seal. According to the connection type, it can be divided into flange connection and wafer connection; According to the transmission mode, it can be divided into manual, gear transmission, pneumatic, hydraulic and electric. Troubleshooting of daily butterfly valve.