The 77/78-31100 series pneumatic butterfly valve consists of a valve part and a gear and rack type dual piston pneumatic actuator. The valve part is 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 controlling fluids or media containing particles in low-pressure applications, and can be widely used in automation control in industries such as petroleum, chemical, metallurgy, and light industry.

Key Features:
The 77/78-31100 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.