Pneumatic actuators in aluminum CH-air ‘A’



Pneumatic valve actuator, quarter turn
Brand: CH-air A Type
Rack and pinion design
Blow-out proof pinion
Housing: Extruded aluminum, hard anodized, PTFE? coated, or ENP coated
Ends: Cast aluminum
Pinion: ENP steel
Pistons: Cast aluminum
Seals: NBR


Driven by dry, filtered compressed air
Min/ max air pressure: 2bar/ 8bar
Min/ max working temperature: -20C to 80C
Air to open, air to close (double acting) or spring to close (spring return)


Torque output dependant upon air supply pressure or quantity of springs.
Allow a safety factor when sizing.
Valve torque increases when idle for long periods.
Valve torque increases in dry duty applications.


CH-air pneumatic actuator with hard anodized aluminum housing, rack and pinion design, manufactured in the EU. Model ‘A’ Type. Driven by compressed air with air to open air to close for double acting, or air to open spring close for single acting or spring return. Conforms to ISO5211 for mounting of valves, and Namur plus VDI-VDE3845 for mounting of solenoid valves, limit switch boxes and positioners. CE marked. ATEX Zone I and II certified and Sil 3 rated. Buy CH-air actuators and actuated valves online at AVS.

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