Troubleshooting
Valve Troubleshooting
Valve Troubleshooting in industrial control systems — covering 5 topic areas in the CurryControls.com controls and automation knowledge hub.
Written guides in this section
Full references, procedures, and diagnostic guides published under Valve Troubleshooting.
Valve Will Not Reach Position
A valve commanded to a position that stops short: an obstruction or a seat the actuator cannot push through, travel limits or a positioner span set wrong, a stem binding, an actuator undersized or out of air, or a command signal that does not span.
8 min readUpdated Sep 5, 2026
Valve Hunting
A modulating valve that never settles: a loop tuned too hard, a positioner gain too high, stiction producing a limit cycle, a noisy command or feedback, an oversized valve working near its seat, or two loops fighting. The manual test that separates them.
8 min readUpdated Sep 5, 2026
Valve Slow to Respond
A valve that takes far longer to move than it should: a pneumatic supply restricted or leaking; a positioner tuned slow; an electric actuator whose speed is fixed; a stem binding in cold or packing; or a rate-limited output. Measuring the stroke time.
8 min readUpdated Sep 5, 2026
Position Feedback Wrong
The HMI says one position and the valve is at another: a feedback potentiometer worn or miscalibrated, a linkage that slipped, scaling that does not match, a reversed signal, limits set wrong, or noise. Comparing indicator, feedback, and process.
8 min readUpdated Sep 5, 2026
Actuator Torque Fault
An electric actuator that trips on torque: at the seat because the seating mode or setting is wrong, in mid-travel because something is in the way or the stem binds, or under flow because the differential exceeds the sizing. The checks before a reset.
8 min readUpdated Sep 5, 2026
Topics in this area
Valve Will Not Reach Position
Valve Will Not Reach Position — practical reference notes for controls engineers, integrators, and technicians working with valve troubleshooting.
Valve Hunting
Valve Hunting — practical reference notes for controls engineers, integrators, and technicians working with valve troubleshooting.
Valve Slow To Respond
Valve Slow To Respond — practical reference notes for controls engineers, integrators, and technicians working with valve troubleshooting.
Position Feedback Wrong
Position Feedback Wrong — practical reference notes for controls engineers, integrators, and technicians working with valve troubleshooting.
Actuator Torque Fault
Actuator Torque Fault — practical reference notes for controls engineers, integrators, and technicians working with valve troubleshooting.
Direct contact
Have a controls question?
Reach Eric Sullivan directly about anything on this site, a controls or automation topic, or one of his personal projects.
References to manufacturers, products, model numbers, software platforms, technical specifications, companies, standards organizations, or other organizations are provided for informational purposes and do not imply sponsorship, endorsement, authorization, or affiliation unless expressly stated. Manufacturer specifications must be independently verified against current manufacturer documentation.