The ZSH/SW series pneumatic butterfly valve consists of a butterfly valve and a gear and rack type dual piston pneumatic actuator. The butterfly valve has an open structure. This series of pneumatic butterfly valves has the advantages of simple structure, reliable use, high flow capacity, and light weight. They are mainly used for flow and pressure control of low-pressure media and can be widely used in automation control in industries such as petroleum, chemical, metallurgy, and light industry.

Main Features
The ZSH/SW series pneumatic butterfly valve has a relatively simple structure. The valve is mainly composed of a valve body, butterfly plate, valve stem, packing, etc. The valve plate and valve body have an open structure (i.e. no valve seat structure), which is easy to maintain. However, the leakage rate is large. Therefore, this series of valves is mainly used in situations where leakage requirements are not high.