Azbil AGVB - User Manual

Questions and Answers:

C
Christian CarterAug 14, 2025
What to do if my Azbil AGVB valve is not operating?
- M
  Maria BellAug 14, 2025
  If your Azbil Control Unit valve isn't operating, several issues could be the cause. Start by checking for leaks in the signal pipe or air pipe, especially at the fittings. Also, examine the diaphragm for any damage and consider replacing it if necessary. Ensure the air pressure regulator filter isn't clogged and that the controller, positioner, and pilot valve are functioning correctly. If those aren't the problem, disassemble and inspect the valve body for obstructions or damage to the valve stem or plug, addressing any issues found.
P
popejamesAug 17, 2025
Why is the Azbil AGVB valve operation unreliable?
- G
  Gary SmithAug 17, 2025
  Unreliable valve operation in your Azbil Control Unit can stem from various factors. The valve capacity might be too large; try reducing the differential pressure or replacing the valve trim with a smaller Cv. Ensure the flow direction matches the valve's indication. Fluctuations in supply air pressure can also cause issues; consider increasing compressor capacity or installing a dedicated compressor. Check the air pressure regulator and address any hunting of signal pressure by inserting an air volume tank or restrictor. Also, verify the controller and positioner for proper function and wear. Finally, fluctuations in axial thrust may require reducing differential pressure, replacing the actuator, or adding a positioner.
G
gcampbellAug 21, 2025
How to fix Azbil AGVB valve that does not fully open or leaks heavily?
- R
  Ryan WattsAug 21, 2025
  If your Azbil Control Unit valve doesn't fully open or leaks significantly, the valve plug and/or seat ring may be damaged due to corrosion, erosion, or abrasion. Consider lapping or re-machining these parts, or replacing them with hardened versions. Check for corrosion or erosion around the seat ring's outer circumference and replace the seat ring or gasket if needed, possibly using a different mounting method like welding. If fluid leaks from the valve body's partition, weld pinholes or replace the valve body. High fluid differential pressure can also be a factor; reduce it or increase the actuator output. Lastly, inspect and clean the valve body to remove any foreign matter. If the valve stem is stuck due to heat, try to separate these parts.
R
Robin LynchAug 25, 2025
What to do if fluid leaks from the gland packing of my Azbil AGVB Control Unit?
- S
  sarah26Aug 26, 2025
  If fluid leaks from the gland packing of your Azbil Control Unit, start by tightening the gland packing or bolts if they are loose. If you are using graphite yarn packing, replenish the grease. If the packing is deteriorated, replace it, possibly with a different material. Also, inspect the valve stem and the interior of the packing box for damage, corrosion, or erosion; re-machine or replace parts as necessary. If there is a lot of foreign matter, attach a felt ring or rubber bellows to protect the valve stem.
D
Darrell HartAug 28, 2025
Why is my Azbil AGVB valve vibrating?
- K
  Kristin JacksonAug 28, 2025
  Valve vibration in your Azbil Control Unit may be due to insufficient support for the piping; ensure you support the inlet and outlet of the valve. Another cause could be an external vibration source, which you should try to remove. Lastly, a worn guide can cause vibration; replace the guide bushing and/or the valve plug.
V
Victoria HarrisSep 1, 2025
What causes a slow valve stroke in my Azbil AGVB Control Unit?
- T
  Tiffany FoxSep 1, 2025
  A slow valve stroke in your Azbil Control Unit can occur if the valve plug guide or the bonnet's fluid retaining part is clogged with slurry; disassemble and clean these parts. You might also consider installing a steam jacket on the valve body. Alternatively, the gland packing may be hardened, requiring replacement of the packing or the grease.
D
David AguilarSep 5, 2025
What should I do if fluid leaks from the gasket in my Azbil Control Unit?
- S
  Stacey WillisSep 5, 2025
  If fluid is leaking from the gasket in your Azbil Control Unit, the gasket may be damaged, corroded, or eroded. Replace the gasket and consider using a gasket made of a different material.
M
Mr. Robert BarreraSep 9, 2025
Why have the valve travel and control rangeability narrowed in my Azbil AGVB Control Unit?
- M
  mark87Sep 9, 2025
  The valve travel or control rangeability in your Azbil Control Unit might have narrowed because the valve plug is corroded, eroded, or abraded, which changes the valve characteristic. Replace the valve plug and seat ring, considering parts made of a different material for improved corrosion resistance and rigidity.

Azbil AGVB Specifications

General

Type	Control Unit
Communication	RS-485
Power Consumption	5 W
Input Voltage	24 VDC
Operating Temperature	-10 to 55 °C

Summary

Introduction

Unpacking and Storing the Product

Guides on how to unpack and store the control valve safely.

Safety Precautions

Symbols

Explanation of safety icons used in the manual for warnings and cautions.

Notes for Safe Operation

Handling Precautions

Installation Precautions

Safety guidelines and requirements for installing the control valve.

Precautions for Air Supply Piping and Electrical Work

Handling Precautions

Safety measures for handling air supply and electrical connections.

Precautions for Assembly and Disassembly

Precautions for Maintenance

Handling Precautions

Safety guidelines for maintaining the control valve and its components.

Chapter 1. Structure of the Control System

1-1. Introduction

Introduction to the control valve system and its operation.

1-2. Control Valve Structure

Details the components and structure of the control valve.

1-3. Specifications of the Control Valve

Lists the essential specifications and operating parameters of the control valve.

1-4. Dimensions and Weight

Provides dimensional data and weight specifications for the control valve.

Chapter 2. Installation

2-1. Installation Location

Cautions and considerations for selecting a suitable installation site.

2-2. Check before Installation on the Pipe

Checks to perform on the AGVB control valve before installing it on the piping.

2-3. Installation on the Pipe

Detailed steps and examples for installing the control valve onto the piping.

2-4. Air supply connection

Instructions for connecting the air supply to the control valve.

2-5. Inspection after Installation and Precautions for Operation

Checks and safety precautions after installing the valve before operation.

Chapter 3. Operation

3-1. Trial-Run Inspection and Adjustment

Procedures for testing and adjusting the control valve after installation.

3-2. Use of the Side Handwheel

Instructions on how to operate the control valve using the side handwheel.

3-3. Troubleshooting

Common problems and their solutions for control valve operation.

Chapter 4. Maintenance

4-1. Inspection of the Control Valve

Guidelines for inspecting the control valve to maintain performance and prevent issues.

4-1-1. Daily Inspection

Daily checks to ensure the proper functioning and safety of the control valve.

4-1-2. Periodic Inspection

Scheduled inspections and checks for the control valve to ensure long-term reliability.

4-2. Removing the Control Valve

Procedures and safety precautions for safely removing the control valve from its installation.

Chapter 5. Disassembly and Reassembly of the Control Valve

5-1. Before Disassembly

Preparatory steps and precautions before disassembling the control valve.

5-2. Necessary Tools

Lists the tools required for disassembling and reassembling the control valve.

5-3. Removal of the Actuator from the Valve Body and Reassembly, and Changing the Orientation of the Actuator

Instructions for removing, reassembling, and changing the actuator orientation.

5-4. Disassembling the Valve Body

Step-by-step guide to disassembling the main valve body components.

5-5. Reassembling the Valve Body

Detailed instructions for reassembling the control valve body after disassembly.

Chapter 6. Disassembly and Reassembly of Model PSA Actuator

6-1. Disassembly of the Actuator

Procedures for safely disassembling the PSA actuator.

6-2. Reassembly of Model PSA Actuator

Procedures for correctly reassembling the PSA actuator.

6-3. Mounting the Actuator on the Valve Body

Steps to mount the actuator onto the main valve body.

6-4. Removing the Side Handwheel from the Actuator

Instructions for removing the side handwheel from the actuator.

6-5. Disassembly of the Side Handwheel

Steps to disassemble the side handwheel unit.

6-6. Assembly of the Side Handwheel

Steps to assemble the side handwheel unit.

6-7. Mounting the Side Handwheel on the PSA Actuator

Instructions for mounting the side handwheel onto the PSA actuator.

Chapter 7. Disassembly and Reassembly of Model PSA6 Spring Type Piston Cylinder Actuator

7-1. Overview

Overview of the PSA6 spring type piston cylinder actuator.

7-2. Auto;Manual Switching Method

Procedure for switching between automatic and manual operation modes.

7-3. Disassembly and Reassembly of the Actuator

Detailed procedures for disassembling and reassembling the actuator.

7-3-2. Disassembly of the Spring Unit

Step-by-step guide for disassembling the spring unit of the actuator.

7-3-3. Reassembly of the Actuator

Instructions for reassembling the actuator after disassembly.

7-4. Main Parts to be Replaced

Identifies parts that require periodic replacement for the actuator.

Chapter 8. Low-Emission Gland Packing System

8-1. Overview

Introduction to Azbil's low-emission gland packing system for valve seal performance.

8-2. Structure

Details the structure and components of the low-emission gland packing system.

8-3. Assembling the Parts of the Gland

Procedures for assembling the components of the gland packing system.

8-3-3. Retightening

Instructions for retightening the gland nuts as needed to maintain seal performance.

Chapter 9. ISO 15848-1 Certified Low-Emission Gland Packing System

9-1. Overview

Overview of the ISO 15848-1 certified low-emission gland packing system.

9-2. Structure

Details the structure of the low-emission gland packing system and its components.

9-3. Starting Operation

Steps to take before operating the valve with the low-emission gland packing system.

9-4. Assembling the Parts of the Gland

Procedures for assembling the parts of the gland packing system.

9-5. Application to Existing Control Valves

Considerations for applying the low-emission system to existing control valves.

Chapter 10. Maintenance Information

Maintenance Information

General information about maintenance parts and support.

Ordering

How to order necessary parts and consumables for maintenance.

Maintenance service

Information on available maintenance services and support from Azbil.

Chapter 11. Disposal

Appendix A. Standard Specifications

Valve body

Specifies details about the control valve body.

Trim

Details about the trim components of the control valve.

Actuator

Specifies details about the actuator.

Valve action

Describes the direct and reverse action of the valve.

Optional accessories

Lists available optional accessories for the control valve.

Additional specifications

Lists additional specifications and tests performed on the product.

Appendix B. Dimensions and Weight

Appendix C. Main Parts to be Replaced

Valve body

Lists parts of the valve body requiring periodic replacement.

Actuator

Lists parts of the actuator requiring periodic replacement.

Related product manuals

Azbil AGVB - User Manual

Table of Contents

Questions and Answers:

Azbil AGVB Specifications

Summary

Introduction

Unpacking and Storing the Product

Safety Precautions

Symbols

Notes for Safe Operation

Handling Precautions

Installation Precautions

Precautions for Air Supply Piping and Electrical Work

Handling Precautions

Precautions for Assembly and Disassembly

Precautions for Maintenance

Handling Precautions

Chapter 1. Structure of the Control System

1-1. Introduction

1-2. Control Valve Structure

1-3. Specifications of the Control Valve

1-4. Dimensions and Weight

Chapter 2. Installation

2-1. Installation Location

2-2. Check before Installation on the Pipe

2-3. Installation on the Pipe

2-4. Air supply connection

2-5. Inspection after Installation and Precautions for Operation

Chapter 3. Operation

3-1. Trial-Run Inspection and Adjustment

3-2. Use of the Side Handwheel

3-3. Troubleshooting

Chapter 4. Maintenance

4-1. Inspection of the Control Valve

4-1-1. Daily Inspection

4-1-2. Periodic Inspection

4-2. Removing the Control Valve

Chapter 5. Disassembly and Reassembly of the Control Valve

5-1. Before Disassembly

5-2. Necessary Tools

5-3. Removal of the Actuator from the Valve Body and Reassembly, and Changing the Orientation of the Actuator

5-4. Disassembling the Valve Body

5-5. Reassembling the Valve Body

Chapter 6. Disassembly and Reassembly of Model PSA Actuator

6-1. Disassembly of the Actuator

6-2. Reassembly of Model PSA Actuator

6-3. Mounting the Actuator on the Valve Body

6-4. Removing the Side Handwheel from the Actuator

6-5. Disassembly of the Side Handwheel

6-6. Assembly of the Side Handwheel

6-7. Mounting the Side Handwheel on the PSA Actuator

Chapter 7. Disassembly and Reassembly of Model PSA6 Spring Type Piston Cylinder Actuator

7-1. Overview

7-2. Auto;Manual Switching Method

7-3. Disassembly and Reassembly of the Actuator

7-3-2. Disassembly of the Spring Unit

7-3-3. Reassembly of the Actuator

7-4. Main Parts to be Replaced

Chapter 8. Low-Emission Gland Packing System

8-1. Overview

8-2. Structure

8-3. Assembling the Parts of the Gland

8-3-3. Retightening

Chapter 9. ISO 15848-1 Certified Low-Emission Gland Packing System

9-1. Overview

9-2. Structure

9-3. Starting Operation

9-4. Assembling the Parts of the Gland

9-5. Application to Existing Control Valves

Chapter 10. Maintenance Information

Maintenance Information

Ordering

Maintenance service

Chapter 11. Disposal

Appendix A. Standard Specifications

Valve body

Trim

Actuator

Valve action

Optional accessories