What Is Pneumatic Butterfly Valve

The pneumatic butterfly valve is composed of a pneumatic actuator and a butterfly valve. Air actuated butterfly valve uses compressed air as the power source to drive the valve stem and control the rotation of the disc around the shaft to open and close the valve.

According to the pneumatic device can be divided into: single-acting pneumatic butterfly valve and double-acting pneumatic butterfly valve.

Single-acting pneumatic butterfly valve is spring reset, generally in dangerous working conditions use more, such as transport combustible gas or combustible liquid, in the loss of gas source and emergencies, single acting pneumatic actuator can automatically reset. The single acting pneumatic butterfly valve is only driven by the air source and the closing action is spring reset so that the danger can be reduced to a minimum.

Double-acting pneumatic butterfly valve switch action through the air source to drive the implementation, that is, whether the valve is open or closed need to use the air source, air open, air off. Loss of gas source valve to maintain the state at the time, the gas source reconnected, the valve can continue to work. Pneumatic butterfly valve is not only widely used in petroleum, gas, chemical, water treatment and other general industry, but also used in the cooling water system of thermal power station.