M6 SERIES IOM
6th EDITION
ISSUED 12/2014
13
B. Setting The Stops on Spring Return Units (Fail Closed)
1. Remove the air supply to the A port. Actuator will move to the closed position. Please note the position
of the actuator.
2. Apply air to open the actuator. Please note the position of the actuator in the open position.
3. While the air supply is maintained carefully loosen the locknut on the closed stop and adjust the stop to
the correct position desired.
4. Retighten the locknut.
5. Remove the air supply and the actuator will go to the closed position desired.
6. If the correct position is not achieved repeat 1-5.
7. Loosen the locknut on the open stop and adjust the travel desired. (Clockwise adjustment decreases
travel.)
8. Retighten the locknut.
9. Apply air and check the open position. If not correct repeat instructions 5-8.
Open Limit Stop
Closed Limit Stop
Fig. 6.2
The above illustration shows a spring return actuator (FCW configuration) in the open position and identifies the
opening and closing limit stops.
