When the electric ball valve is in the open state, please note that this is a complete open state, and the thickness of the butterfly plate becomes the only resistance when the medium fluid works in the valve body. In this way, the pressure generated by the valve is much smaller. It is not difficult to see that the electric ball valve has a good flow control feature. In addition, there are two main types of seal, namely, elastic seal and metal seal. The former can be embedded into the valve body or directly installed around the butterfly plate, while the latter has a longer service life than the former, and cannot achieve integrity sealing. As for which one is needed, it depends on the actual situation. 　　　　

Today, let me analyze the development trend of pneumatic butterfly valves in domestic and foreign markets.