- Fail Mid 180° actuators with 90° safety position
The Fail Mid 180° actuators with 90° safety position are used for 0°-90°-180° circuits in which a 90° angle at air failure should be approached. On both sides of the actuator a spring block is mounted which is tensioned by the rotation of the 90° position.
The fail mid 90° (safety) position is achieved by the action of the spring force, in air or power failure, from 0° or 180° position.
Air failure: 180°:
At power failure (air or electric failure) at port 2, the pistons are moved by the spring force inwards to the center position. A clockwise rotation is effected.
0°: If power fails at port 4, the pistons are moved by the spring force in outside direction to the center position. A rotating counterclockwise direction is effected.