Air Torque AT451U - 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 AT451U

Installation Maintenance And Operating Instructions12 pages

Questions and Answers

K
kimberlysmithAug 9, 2025
What to do if my Air Torque AT451U Controller loses power?
- M
  Michael RamirezAug 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.
D
Dustin KellyAug 19, 2025
Why is my Air Torque AT451U rotation uneven?
- G
  Gregory JohnsonAug 19, 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.
L
lori81Aug 28, 2025
How to fix incomplete rotation of Air Torque Controller?
- P
  phyllisvincentAug 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

Notes on Possible Severe Personal Injury

Details severe injury risks from pressurized equipment, bursting components, and falling loads.

Notes on Possible Personal Injury

Highlights risks of injury from moving parts, air exhaust, preloaded springs, and illegible labels.

Markings on the Device

Actuator Nameplate Sample

Design and Principle of Operation

Direction of Action and Fail Positions

Technical Data

Shipment and On-Site Transport

Transporting the Actuator

Guidelines for safely transporting the actuator using equipment like cranes or forklifts.

Lifting the Actuator

Instructions and warnings for safely lifting the actuator using appropriate equipment.

Mounting and Assembly

Preparation for Installation

Control and Signal Devices Assembly

Mounting the Actuator over the Valve

Detailed instructions and safety warnings for mounting the actuator onto the valve.

Start-up

Operation

Malfunctions

Troubleshooting

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

Service

Preparation for Servicing

Disassembly

Step-by-step instructions for disassembling the actuator and its various components.

Service Operations

Reassembly

Decommissioning

Removal

Repairs

Summary

Safety Instructions and Measures

Notes on Possible Severe Personal Injury

Details severe injury risks from pressurized equipment, bursting components, and falling loads.

Notes on Possible Personal Injury

Highlights risks of injury from moving parts, air exhaust, preloaded springs, and illegible labels.

Markings on the Device

Actuator Nameplate Sample

Design and Principle of Operation

Direction of Action and Fail Positions

Technical Data

Shipment and On-Site Transport

Transporting the Actuator

Guidelines for safely transporting the actuator using equipment like cranes or forklifts.

Lifting the Actuator

Instructions and warnings for safely lifting the actuator using appropriate equipment.

Mounting and Assembly

Preparation for Installation

Control and Signal Devices Assembly

Mounting the Actuator over the Valve

Detailed instructions and safety warnings for mounting the actuator onto the valve.

Start-up

Operation

Malfunctions

Troubleshooting

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

Service

Preparation for Servicing

Disassembly

Step-by-step instructions for disassembling the actuator and its various components.

Service Operations

Reassembly

Decommissioning

Removal

Repairs

Air Torque AT451U Specifications

General

Brand	Air Torque
Model	AT451U
Category	Controller
Language	English

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