How to calibrate an ABB regulation valve (FCV)

When to use this guide

Use this procedure when:

• A regulation valve has been installed or replaced

• Valve position feedback does not match the actual valve position

• The actuator has lost its calibration

• Commissioning or troubleshooting requires recalibration

• Internal leaking is observed - Flow readings on corosponding Flow transmitter even when FCV is at 0% or no flow readings when it is at 100%. 

Preconditions

Before starting the calibration:

• The system is in a stoptate

• The valve can move freely between end positions

• Power and air is supplied to the valve actuator

• No active interlocks prevent valve movement - Valve is in auto on HMI.

Step-by-step calibration procedure

1. Remove the front cover of the ABB valve actuator.

2. Press and hold the “F” push button for 5 seconds.
   

3. The menu “ADJ_ROT” will appear on the display.
   

Press and hold the “F” push button again for 3 seconds.

• The calibration sequence will start automatically.

1. Wait until the calibration sequence is finished.

   • This may take a few minutes.

2. Once calibration is complete, adjust the visual position indicator if needed:

   • Remove the indicator

   • Re-mount it so it correctly reflects the actual valve position

After calibration move the valve from 0% to 30% to 60% to 100% from the skids HMI and check if local display and HMI reading matches within +/- 1%.

Notes and common mistakes

• Do not interrupt power during the calibration sequence

• Ensure the valve is not mechanically blocked

• Calibration may fail if the valve cannot reach its full stroke

When to stop and contact LiqTech Service

Stop the procedure and contact LiqTech Service if:

• The calibration does not complete, even after an hour.

• Error messages appear on the actuator display

• The valve position remains incorrect after recalibration

Reference

This procedure is based on the internal quick guide:
Calibration of ABB regulation valve