2. There are many kinds of pneumatic plug valves combined with many kinds of equipment. In addition, in the design process of pneumatic plug valves, many places are connected with modern equipment. The main pipelines in the plug valves play the most important role in the whole operation process, especially in the process of cutting off and upgrading, It also plays an important role in changing the direction of runny nose. The use of pneumatic plug valve is very convenient, which can change the mechanism between pipes. Even if there is only one valve, it can obtain two, three or more different flow directions. Although this design is more complex, it reduces the trouble in the use process, not only reducing the use of valves, And some accessories of the equipment have also been reduced. 　　

Butterfly valve test and commissioning and common troubleshooting methods: I. Installation test and adjustment:
1. The manual, pneumatic, hydraulic and electric components of this product have been strictly debugged before leaving the factory. When rechecking the sealing performance, users should evenly fix both sides of the inlet and outlet, close the butterfly valve, apply pressure to the inlet side, and observe whether there is leakage at the outlet side of the electric control valve. Before the strength test of the pipeline, the disc should be opened to prevent damage to the sealing pair. 　　
2. Although this product has been strictly inspected and tested before leaving the factory, some pneumatic control valves have automatic screw displacement during transportation, which requires readjustment, pneumatic, hydraulic, etc. Please read the operating instructions of the supporting drive device. 　　
3. (Electric drive butterfly valve) The opening and closing travel of the control mechanism has been adjusted well before delivery. In order to prevent the power supply from being connected in the wrong direction, after the first power supply is connected, the user should first turn on the manual switch to the half open position, and then press the electric switch to check that the direction of the pneumatic butterfly valve indicator is consistent with the valve closing direction.