What to do if my Flowserve Valve Positioners position is driven fully open or closed?
- RRhonda WilsonJul 27, 2025
If the position is driven fully open or closed and not responding, perform a stroke calibration (Quick-Cal). Verify hardware connections of the inner-loop hall sensor. Check ATO (Air-to-open) and ATC (Air-to-Close) settings and recalibrate using Quick-Cal to apply settings. Also, verify ATO/ATC actuator tubing. Consider replacing the electro-pneumatic converter or adjusting the inner-loop to see if proper control resumes.