Photo: ToT89 · CC BY-SA 4.0 · Image credits
Control Valves & Actuators
Spring-return Pneumatic Actuator (Rack & Pinion)
Model: PA-SR
Double- or single-acting quarter-turn actuator with spring return for ball and butterfly valves.
- 10 to 5000 Nm torque range
- Fail-safe spring and ±5° travel stops
- Anodised aluminium body
- ISO 5211 and NAMUR mounting
Nationwide delivery · Free technical advice
Torque10 – 5000 Nm
Stroke90° (±5°)
ActuationDouble / spring-return
Air supply2.5 – 8 bar
Overview
The PA-SR rack-and-pinion mechanism gives stable torque over the whole stroke. The spring-return type drives the valve to a safe open or closed position on air loss, and a limit-switch box with indicator mounts on top.
Technical specifications
General
- Torque
- 10 – 5000 Nm
- Stroke
- 90° (±5°)
- Actuation
- Double / spring-return
- Air supply
- 2.5 – 8 bar
Materials & construction
- Body material
- Aluminium (anodised)
- Sealing
- NBR · FKM
Process conditions
- Operating temperature
- −20 … +80 °C
- Duty cycle
- Continuous
Mechanical
- Mounting
- ISO 5211 · NAMUR
Applications
Ball and butterfly valve automation
Steam and process lines
Emergency shutdown systems
Water treatment
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