The electric ball valve device is convenient, and it can be used for complete active control. No manual control is required. For elastic sealing valve, the sealing ring can be embedded on the valve body or attached to the periphery of the butterfly plate. Metal seal valves generally have more lifespans than flexible seal valves, but it is difficult to achieve good sealing. Metal seals can get used to higher working temperature, and elastic seals have the defect of temperature constraint.

First, if the pneumatic butterfly valve has faults such as electric control back control, it is better to check with professionals. Generally, the troubleshooting work will be based on the schematic diagram of the butterfly valve, and then judge whether to eliminate the problem according to the analysis one by one. The engineer summarized a "fault analysis tree diagram", in which you can check one by one according to the defects from easy to difficult, and find out where the fault occurs with the help of the tree diagram.