Calibration Necessity

Actuators with positioners or feedback sensors rely on calibrated settings to align valve positions with control signals. Over time, vibration, temperature changes, or component wear can shift these settings, causing inaccurate flow regulation or valve misalignment.

Recommended Frequency

For critical applications, calibrate every 3–6 months. In less demanding environments, annual checks suffice. After maintenance or repairs, immediate calibration ensures restored accuracy.

Key Calibration Steps

Use a calibration tool to send test signals and verify valve position with a protractor or position sensor. Adjust the positioner's zero and span settings to align actual movement with command signals.

Test full stroke to confirm no overshoot or lag.

Signs of Misalignment

Irregular valve response, inconsistent flow rates, or position errors signal the need for calibration. Ignoring these issues can lead to process inefficiencies or safety risks.

Exceptions

Basic actuators without positioners may need less frequent calibration, but periodic checks of mechanical stops are still advisable to prevent performance degradation.