At the same time, when using the pneumatic switch butterfly valve, because its working procedure is relatively simple, the user can understand the corresponding use and release method in a relatively short time. Such a clear operation method makes people more inclined to choose the butterfly valve, because it reduces the corresponding problems caused by not knowing the operation in use to a certain extent.

When the butterfly valve is in the middle opening, the opening shape formed by the valve body and the front end of the butterfly plate takes the valve shaft as the center, and different states are formed on both sides. The front end of the butterfly plate on one side moves along the flow direction, and the other side moves against the flow direction. Therefore, the valve body and the valve plate on one side form a nozzle shaped opening, and the other side is similar to the orifice shaped opening. The flow rate on the nozzle side is much faster than that on the throttle side, Negative pressure will be generated under the throttle side valve, and rubber seals will often fall off.