Air Torque AT251U - 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 AT251U

Installation Maintenance And Operating Instructions12 pages

Questions and Answers

L
Leah MillerAug 8, 2025
What to do if my Air Torque AT251U loses power?
- B
  bpowersAug 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.
A
Amy GreenAug 18, 2025
Why is my Air Torque AT251U Controller rotation uneven?
- M
  Matthew SmithAug 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.
J
Jennifer YoderAug 29, 2025
How to fix incomplete rotation of Air Torque AT251U?
- A
  Anthony HendrixAug 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

Safety Instructions and Measures

Personnel and PPE Requirements

Specifies personnel qualifications and recommended personal protective equipment.

Hazard Warnings and Responsibilities

Covers residual hazards, operator duties, and personnel responsibilities.

Injury and Damage Notes

Details risks of severe injury, personal injury, and property damage.

Design and Principle of Operation

Mounting and Assembly

Mounting the Actuator Over the Valve

Details the process of attaching the actuator to the valve.

Start-up

Operation

Malfunctions

Troubleshooting

Lists common malfunctions and their recommended solutions.

Emergency Action

States the plant operator's responsibility for emergency actions.

Service

Preparation for Servicing

Disassembly Procedures

Detailed steps for disassembling various actuator components.

Service Operations

Reassembly Procedures

Steps for reassembling actuator components after service.

Stroke Adjustment

Decommissioning

Removal

Repairs

Disposal

Summary

Safety Instructions and Measures

Personnel and PPE Requirements

Specifies personnel qualifications and recommended personal protective equipment.

Hazard Warnings and Responsibilities

Covers residual hazards, operator duties, and personnel responsibilities.

Injury and Damage Notes

Details risks of severe injury, personal injury, and property damage.

Design and Principle of Operation

Mounting and Assembly

Mounting the Actuator Over the Valve

Details the process of attaching the actuator to the valve.

Start-up

Operation

Malfunctions

Troubleshooting

Lists common malfunctions and their recommended solutions.

Emergency Action

States the plant operator's responsibility for emergency actions.

Service

Preparation for Servicing

Disassembly Procedures

Detailed steps for disassembling various actuator components.

Service Operations

Reassembly Procedures

Steps for reassembling actuator components after service.

Stroke Adjustment

Decommissioning

Removal

Repairs

Disposal

Air Torque AT251U Specifications

General

Brand	Air Torque
Model	AT251U
Category	Controller
Language	English

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