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How to Adjust the Stroke Accuracy of a
90-Degree Pneumatic Actuator
To ensure precise 90-degree rotation and
proper valve positioning, follow these adjustment steps:
1. Check Air Supply & Pressure
Ensure stable air pressure (typically 4–6
bar) with a regulator.
Verify clean, dry air to prevent sluggish
movement.
2. Mechanical Stopper Adjustment
Most actuators have adjustable end stops
(mechanical screws or cams).
Loosen the locknut and adjust the stopper
to fine-tune the open/close positions.
Tighten securely after adjustment to
prevent drift.
3. Limit Switch Calibration (if equipped)
For actuators with electro-pneumatic
controls, adjust the limit switches to signal correct open/close positions.
Use a multimeter or PLC feedback to verify
signaling accuracy.
4. Lubrication & Friction Check
Ensure all moving parts (piston, bearings,
O-rings) are properly lubricated.
Remove any obstructions causing binding or
misalignment.
5. Test & Fine-Tuning
Cycle the actuator multiple times while
monitoring rotation.
If over- or under-rotation occurs, readjust
the stoppers or air pressure.
Proper adjustment ensures reliable sealing
and extends actuator life. For critical applications, consider digital
positioners for enhanced precision.
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