In order to make industrial valves more practical, electric butterfly valves have been classified into switching type and regulating type, so that the industry can select appropriate electric butterfly valves according to its own needs, and also allow the industry to operate conveniently. The installation of the electric butterfly valve is very convenient, and the installation method is clearly written on the relevant purchase certificate, which not only allows the merchants to install, but also creates favorable conditions for their own installation. The installation precautions will also be marked accordingly. 　　

Compared with general butterfly valves, pneumatic on-off butterfly valves not only have butterfly valve components, but also need a pneumatic actuator to play a role. With the travel limit switch and air source, the switch operation can be realized. In terms of structural materials, the pneumatic butterfly valve is also different from the general butterfly valve, which mostly adopts the hierarchical metal hard seal structure, or the PTFE soft seal structure. In this way, most pneumatic butterfly valves have the advantages of compact structure, small size, good sealing, and strong adaptability in different pipelines and operating environments.