Rotary Actuator Single Acting

RE Series Single-Acting Rotary Actuator – Spring Return

The RE series spring-return actuator provides air-powered movement in one direction and a spring-powered return for quarter-turn valve automation.

Alpha Pompe / Alphair RE actuators are supplied by ATS Pneumatics from Christchurch stock in SR6/6 configuration: six spring cartridges per piston side, twelve in total. The springs drive the return when the powered chamber is exhausted. The required fail-open or fail-closed position depends on assembly orientation and must be specified and checked.

Choose your actuator size

Select the RE actuator size to suit the required torque on both strokes.
Confirm the fail position, mounting connection, fitted drive and any adaptor or bracket required.
Review the selected actuator’s price and stock status, set your quantity and add it to your cart. Both the air stroke and spring-return stroke must meet the valve’s required factored torque.

Features and specifications

Operation: single-acting rack and pinion, with spring return.
Spring configuration: SR6/6 – six cartridges per piston side.
Size range: RE051, RE064, RE076, RE086 and RE101; online choices follow the published stock variations.
Rotation: 90 degrees.
Travel adjustment: external adjustment of +/-5 degrees at both ends.
Supply rating: 8 bar continuous; 10 bar maximum.
Standard temperature range: -20 to +80 degrees C.
Standard seals: NBR.
Air supply: filtered compressed air, dry or lubricated.
Valve mounting: ISO 5211, with the fitted connection to be confirmed.
Solenoid/accessory interfaces: NAMUR VDI/VDE 3845.
Construction: hard-anodised aluminium body, powder-coated aluminium covers, nickel-plated steel shaft and stainless steel fasteners.

The overview shows the selected model’s minimum air-stroke torque at 6 bar, minimum spring-return torque, listed mounting, nominal air-port size and overall dimensions. The catalogue includes SR6/6 endpoint torque tables; unlisted pressure/configuration combinations require ATS confirmation.

Mountings, valves and accessories

The Mounting & accessory options section shows relevant ATS ball valves, square and oval adaptors, indicators, positioner brackets and switch boxes, with live pricing and availability. Choose the exact option on its product page. Confirm torque on both strokes, fail position, drive, flange, bracket and electrical requirements before ordering a complete assembly.

Stock availability and delivery

Check the selected variation’s current availability. In-stock actuators are supplied from our Christchurch stock, with delivery time additional. Contact ATS about complete valve assemblies, non-stock sizes or other spring configurations.

Technical downloads

Use the Downloads section above for the ATS RE Spring-Return Technical Catalogue, the ATS RE Rotary Actuator Installation Manual, the ATS RE Mounting Accessories Catalogue, the ATS Rotary Actuator & Ball Valve Sizing Guide and the selected model’s Dimension Sheet. The catalogue includes air and spring torque tables, drawings, dimensions, mounting interfaces and an initial ball-valve sizing guide.

Need help choosing a rotary actuator?

Use Actuator sizing & replacement finder, or contact ATS with the valve type and size, process pressure, fluid, temperature, required torque, air pressure, fail position and mounting details.