Air Torque AT401U - 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 AT401U

Installation Maintenance And Operating Instructions12 pages

Questions and Answers

C
Christina VazquezAug 8, 2025
What to do if my Air Torque AT401U Controller loses power?
- J
  Jack FernandezAug 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.
F
fatkinsonAug 18, 2025
Why is my Air Torque Controller rotation uneven?
- H
  howardheatherAug 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.
D
David PriceAug 28, 2025
How to fix incomplete rotation of Air Torque AT401U Controller?
- M
  Michael ParkAug 29, 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

Mounting and Operating Instructions

1 Safety Instructions and Measures

Intended Use and Foreseeable Misuse

Defines the intended application and reasonably foreseeable improper uses of the actuator to ensure safe operation.

Personnel Qualifications and Responsibilities

Warning Against Residual Hazards

Highlights potential residual hazards such as signal pressure and stored spring energy that require preventative measures.

3 Design and Principle of Operation

5 Mounting and Assembly

Preparation for Installation

Mounting Actuator Onto the Valve

Step-by-step instructions for securely mounting the actuator onto the valve, with safety warnings.

6 Start-up

7 Operation

8 Malfunctions and Troubleshooting

Troubleshooting Guide

A table listing common malfunctions with their possible causes and recommended corrective actions.

9 Service and Maintenance

Disassembly Procedures

Step-by-step instructions for safely disassembling various parts of the actuator.

Service Operations and Reassembly

Guidance on performing service operations and reassembling the actuator components correctly.

10 Decommissioning

11 Removal from Valve

12 Repairs

15 Annex

Tightening Torque Specifications

Provides detailed tightening torque values for various screws and nuts used in actuator assembly and maintenance.

Summary

Mounting and Operating Instructions

1 Safety Instructions and Measures

Intended Use and Foreseeable Misuse

Defines the intended application and reasonably foreseeable improper uses of the actuator to ensure safe operation.

Personnel Qualifications and Responsibilities

Warning Against Residual Hazards

Highlights potential residual hazards such as signal pressure and stored spring energy that require preventative measures.

3 Design and Principle of Operation

5 Mounting and Assembly

Preparation for Installation

Mounting Actuator Onto the Valve

Step-by-step instructions for securely mounting the actuator onto the valve, with safety warnings.

6 Start-up

7 Operation

8 Malfunctions and Troubleshooting

Troubleshooting Guide

A table listing common malfunctions with their possible causes and recommended corrective actions.

9 Service and Maintenance

Disassembly Procedures

Step-by-step instructions for safely disassembling various parts of the actuator.

Service Operations and Reassembly

Guidance on performing service operations and reassembling the actuator components correctly.

10 Decommissioning

11 Removal from Valve

12 Repairs

15 Annex

Tightening Torque Specifications

Provides detailed tightening torque values for various screws and nuts used in actuator assembly and maintenance.

Air Torque AT401U Specifications

General

Brand	Air Torque
Model	AT401U
Category	Controller
Language	English

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