Flowserve Logix 510+ User Manual (English)

Questions and Answers:

E
Erin ClarkAug 15, 2025
What to do if Flowserve Logix 510+ Valve Positioners are stuck fully open or closed?
- R
  Roberto ReyesAug 15, 2025
  If your Flowserve Valve Positioner's position is fully open or closed and doesn't respond to commands, here's what to check: 1. Perform stroke calibration (Quick-Cal). 2. Verify hardware connections of the inner-loop hall sensor. 3. Check ATO (Air-to-open) and ATC (Air-to-Close) settings and recalibrate using Quick-Cal to apply settings. 4. Verify ATO/ATC actuator tubing. 5. Consider replacing the electro-pneumatic converter. 6. Adjust the inner-loop offset to see if proper control resumes. Possible causes are uncalibrated stroke, disconnected inner-loop hall sensor, wrong air action entered in software, backward actuator tubing, malfunctioning electro-pneumatic converter, or incorrect inner-loop offset.
W
Wendy BlackAug 18, 2025
Why is the Flowserve Valve Positioners valve position reading incorrect?
- K
  Kyle JacksonAug 18, 2025
  If the valve position reading on your Flowserve Valve Positioners is not what you expect, consider these potential causes and solutions: * Reposition the stem position sensor if it's mounted 180 degrees off. * Perform a Stroke calibration (Quick-Cal). * Verify Tight Shutoff settings. * Verify custom characterization or soft-stop limits. This issue may arise due to incorrect stem position sensor mounting, uncalibrated stroke, active Tight Shutoff MPC (Minimum position cutoff), or active custom characterization or soft stops.
C
Charles ManningAug 21, 2025
How to fix sticking or hunting operation of Flowserve Valve Positioners?
- S
  Sandra AndersonAug 21, 2025
  If your Flowserve Valve Positioner is sticking or hunting, here's what you can do: * Check the air supply for proper filtering and compliance with ISA specifications ISA-7.0.01. * Lower proportional gain settings. * Enable the stability DIP switch on the local interface and recalibrate. If the problem persists, adjust the pressure control window with a handheld communicator or ValveSight and recalibrate. This behavior may be due to contamination of the electro-pneumatic converter, incorrect control tuning parameters, high packing friction, or a corroded or dirty spool valve.