Air Torque Pneumatic Actuator AT251U-D-A F05/F07-N-17DS – 90° Rotation

Product Description

Air Torque Pneumatic Actuator AT251U-D-A F05/F07-N-17DS – Rack & Pinion, 90° Rotation, Anodised Aluminium, SIL?3

The Air Torque AT251U-D-A F05/F07-N-17DS is a double-acting pneumatic actuator engineered for precise and reliable quarter-turn valve automation. Designed with a durable rack & pinion mechanism offering consistent torque and smooth 90° actuation, this model is built for performance in demanding industrial environments. Encased in hard-anodised aluminium, it delivers long-term resistance to corrosion and mechanical wear. Featuring compatibility with ISO 5211 F05 or F07 flange mounting and a 17?mm square DS17 drive shaft, it's perfectly suited for mid- to large-sized valve installations. Fully SIL?3 certified, the AT251U ensures safe operation within functional safety loops.

Key Features

• Double-Acting Operation (D-A): Provides controlled movement in both opening and closing directions.

• Smooth Torque Output: Rack & pinion drive design ensures consistent force throughout the stroke.

• Valve Interface Versatility: Supports ISO F05 or F07 flange mounting for broader valve compatibility.

• Standard Drive Shaft: DS17 (17?mm square) shaft suited to medium and large valve stems.

• Robust Housing: Anodised aluminium construction offers high durability in harsh conditions.

• Safety Certified: SIL?3 rating allows integration into safety-instrumented systems.

• Travel Stops: ±5° adjustable external stops for precise end-of-travel control.

• Accessory Mounting: Namur VDI/VDE 3845 interface for solenoid valves, switchboxes, and positioners.

Technical Specifications

Technical Specs