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How to change spring return damper actuator from fail closed to fail open?

Updated: Sep 10

Nenutec spring return actuators can be used to fail open position or fail closed position upon loss of power based on how the actuator is mounted on the damper shaft. With the CW side facing outside from the damper the spring will rotate the damper shaft clockwise upon loss of power. In the similar way, if the CCW side is facing outwards the actuator will rotate counter-clockwise upon loss of power. Define your desired fail-safe direction of rotation and reposition the actuator to the opposite side as needed.






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