If a pneumatic rotary actuator is not moving and pressure has been verified at the inlet, what should be tested next?

When a pneumatic rotary actuator is not moving despite confirmed pressure at the inlet, testing the actuator's movement by disconnecting the load is a critical step. This action helps identify whether the issue originates from the actuator itself or if the load is inhibiting the actuator's movement.

By disconnecting the load, you isolate the actuator to determine if it can operate freely. If the actuator moves without the load, this indicates that the actuator is functioning correctly and the problem lies with the load or its mechanism. Conversely, if the actuator does not move even without the load, it points to an issue within the actuator itself, possibly suggesting a mechanical fault or internal obstruction.

This approach is essential in troubleshooting as it systematically narrows down the potential causes of the problem, ensuring more efficient diagnostics and repairs.