A pneumatic butterfly valve is a quarter-turn valve used to regulate or isolate flow, operated by a pneumatic actuator. It’s especially suited for handling large volumes of fluids or gases in systems where quick and frequent operation is needed.

Basic Components

Butterfly Valve:

1. Features a disc mounted on a rotating shaft.

2. The disc turns 90° to open or close the flow path.

Pneumatic Actuator:

1. Converts compressed air into mechanical motion to turn the disc.

2. Can be single-acting (spring return) or double-acting.

Accessories (optional):

Solenoid valves, position indicators, limit switches, positioners for remote operation and feedback.

✅ Advantages

• Lightweight and compact design

• Quick and reliable operation

• Cost-effective for large-diameter piping

• Suitable for throttling and flow control (unlike ball valves, which are more for on/off)

• Low pressure drop when open