Air Torque AT551U Spares Repair Kit

Product Description

Air Torque AT551U Spares Repair Kit – Rack & Pinion 90° Pneumatic Actuator – SIL?3

The Air Torque AT551U Spares Repair Kit is an authentic replacement kit designed to refurbish the AT551U 90° rack & pinion pneumatic actuator in standard temperature applications. Fully compliant with SIL?3 (Safety Integrity Level 3), this kit is built for safety-critical and high-integrity systems in sectors like petrochemical, energy, utilities, chemical processing, and industrial automation.

This maintenance kit contains all necessary internal components to restore actuator precision, torque, and sealing performance:

• O-rings, stem seals, and housing seals

• Thrust bearings, piston guides, bushings, and spacers

• Stop-screw seals, friction washers, and wear rings

Key Features

• Compatible Model: Air Torque AT551U series

• Operation: 90° rack & pinion motion

• Temperature Class: Standard (up to approximately +80?°C)

• Safety Certification: SIL?3 – suitable for safety-instrumented systems

• Kit Contents: Complete set of OEM internal wear components for full actuator refurbishment

• Use Case: Ideal for proactive servicing or reactive repair to restore original torque and reliability

• Application Areas: Process automation, power plants, water treatment, oil & gas, manufacturing

• Benefits: Minimises downtime, extends actuator lifespan, preserves architecture integrity

Technical Specs