Fourth, in the pneumatic switch butterfly valve, the rack is also very important, because the angle when opening and starting should be adjusted well, so the connection of the rack is also very important, it can rated the flow when working to a certain extent. 　　

Another point that we should pay attention to is that the elastic valve seat material under high temperature should be considered, because its bearing capacity to operating temperature is limited. If the electric butterfly valve is used as a flow control device, the main thing is to learn to correctly select the size and type of butterfly valve to ensure its value.