Except for automatic valves like check valves, all valves requiring powered operation can be designed as pneumatic actuated valves. Pneumatic valves are automated valves driven by compressed air actuators, widely used in chemical, petroleum, pharmaceutical, and food processing industries for fluid control systems. Their key advantages are fast response, reliability, and adaptability to harsh environments, especially suitable for explosion-proof, high-frequency operation, or remote control scenarios. Pneumatic actuator brands can be customer-specified or selected by our company. If the customer provides working pressure and media details, we calculate thrust and select parameters accordingly; otherwise, sizing is based on nominal pressure.
Size:
According to specific valve.
Material:
Body material is selected based on customer order. As the main component controlling medium flow, available materials include stainless steel, cast iron, plastic, etc.
Internal Parts/Stem:
According to specific valve.
Structure:
According to specific valve.
Single-Acting:
Spring return with air source driving in one direction.
Double-Acting:
Driven by bidirectional air source, without spring (requires a 5/2-way solenoid valve for control).
Solenoid Valve:
Controls the air circuit on/off (e.g., SMC, Festo brands).
Positioner:
Precisely adjusts valve opening (4–20 mA signal input).
Limit Switch:
Provides feedback on valve position.
Operation Mode:
Pneumatic. Compressed air (typically 0.4–0.8 MPa) drives the actuator piston or diaphragm, causing the valve stem to rotate (for ball valves/butterfly valves) or move linearly (for gate valves/globe valves). The solenoid valve switches the direction of the air circuit to open, close, or regulate the valve.
