Air Torque Pneumatic Actuator AT051U-S6-A F04-N-11DS – 90° Rotation

Air Torque Pneumatic Actuator AT051U-S6-A F04-N-11DS – Rack & Pinion, 90° Rotation, Anodised Aluminium, SIL?3

The Air Torque AT051U-S6-A F04-N-11DS is a safety-engineered spring-return pneumatic actuator featuring a stable rack & pinion mechanism with dependable 90° actuation. Housed in hard-anodised aluminium, this model offers durability and corrosion resistance in harsh industrial environments. Certified to SIL 3, it’s ideal for safety-instrumented valve controls where fail-safe operation and precision are required.

Key Features

• Spring-Return (S6) Design: Automatically returns valves to a defined safe position if air supply fails.

• Reliable Mechanics: Rack & pinion drive ensures even torque with smooth mid-stroke motion.

• Valve Interface Standard: ISO 5211 F04 flange with 11?mm square DS11 shaft—well-suited to standard valve stem connections.

• Construction: Hard-anodised aluminium housing provides mechanical protection and long-lasting operation.

• Safety Compliance: SIL?3 rated to support functional safety and redundancy requirements.

• Stroke Adjustment: External ±5° travel stops for precise end-of-travel control.

• Accessory Compatibility: Namur VDI/VDE 3845 mounting interface for solenoid valves, positioners, and limit switches.

Technical Specifications