Air Torque AT551U - User Manual

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Original instructions

EB AT-RP-4GU EN

4th Generation Upgrade Series

Rack&Pinion actuators

AT045U → AT801U models

Edition November 2020

Table of Contents

Other manuals for Air Torque AT551U

Installation Maintenance And Operating Instructions12 pages

Questions and Answers

J
Jennifer OwensAug 8, 2025
What to do if my Air Torque Controller loses power?
- J
  Jeremy JacksonAug 9, 2025
  If your Air Torque Controller experiences a loss of power, first ensure that the supply pressure is correct by checking the control system. Then, inspect all tubing and fittings for blockages, compression, or sealing issues, removing any obstructions or damaged parts. Also, you should disassemble the actuator to inspect and replace any damaged seals. Check the air exhaust hole and remove any plugs or foreign objects that may be blocking it.
Q
qsimonAug 17, 2025
Why is my Air Torque Controller rotation uneven?
- D
  Dr. Lauren AndersonAug 18, 2025
  Uneven rotation in your Air Torque Controller can stem from several causes. Start by checking the supply system to ensure the pressure is correct. If that's not the issue, the actuator may need lubrication; disassemble it, lubricate all sliding parts, and then reassemble. Worn or damaged components can also cause this, so inspect and replace any that are faulty. Ensure the control system components are correctly assembled. If the actuator is mounted on a valve, consult the valve documentation and contact the manufacturer for assistance.
P
Peter BlankenshipAug 28, 2025
How to fix incomplete rotation of Air Torque Controller?
- K
  kirbystephanieAug 28, 2025
  Incomplete rotation of your Air Torque Controller can occur due to several reasons. First, ensure the stroke is correctly adjusted. Next, disassemble the actuator and check for any foreign objects inside. Also, incorrect assembly after maintenance can cause this issue, so disassemble and reassemble the actuator correctly. Make sure the control system components are correctly assembled. If the actuator is mounted on a valve, check the valve documentation and contact the manufacturer.

Summary

Safety Instructions and Measures

Intended Use

Qualifications of Operating Personnel

Notes on Possible Severe Personal Injury

Details severe injury risks, including bursting and falling loads.

Notes on Possible Personal Injury

Covers risks of injury from moving parts, air exhaust, and springs.

Design and Principle of Operation

Direction of Action and Fail Positions

Describes the actuator's rotation direction and its fail-safe positioning.

Technical Data

Mounting and Assembly

Mounting the Actuator over the Valve

Detailed steps for physically attaching the actuator to the valve assembly.

Start-up

Operation

Malfunctions

Troubleshooting

Table of common malfunctions, their possible causes, and recommended actions.

Service

Preparation for Servicing

Part List

Detailed list of actuator components with part numbers and descriptions.

Disassembly

General instructions and safety precautions for disassembling the actuator.

Reassembly

Procedures for reassembling actuator components after service or repair.

Decomissioning

Removal

Repairs

Disposal

Summary

Safety Instructions and Measures

Intended Use

Qualifications of Operating Personnel

Notes on Possible Severe Personal Injury

Details severe injury risks, including bursting and falling loads.

Notes on Possible Personal Injury

Covers risks of injury from moving parts, air exhaust, and springs.

Design and Principle of Operation

Direction of Action and Fail Positions

Describes the actuator's rotation direction and its fail-safe positioning.

Technical Data

Mounting and Assembly

Mounting the Actuator over the Valve

Detailed steps for physically attaching the actuator to the valve assembly.

Start-up

Operation

Malfunctions

Troubleshooting

Table of common malfunctions, their possible causes, and recommended actions.

Service

Preparation for Servicing

Part List

Detailed list of actuator components with part numbers and descriptions.

Disassembly

General instructions and safety precautions for disassembling the actuator.

Reassembly

Procedures for reassembling actuator components after service or repair.

Decomissioning

Removal

Repairs

Disposal

Air Torque AT551U Specifications

General

Brand	Air Torque
Model	AT551U
Category	Controller
Language	English

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