Pneumatic butterfly valve is constructed with pneumatic actuator and butterfly valve. Its
disc is rotated with a rod to be opened and closed. It performs as shut off valve, optional
to be designed to realize the feature of adjustment, or compatible of stage valve and
adjustment feature. It has the advantage of simple structure, small and light, and low cost.
Installed in a high altitude dark channel, it is easy to operated by a two position five way
solenoid valve, also can adjust the media flow.