Mechanical Stroke Adjustment
5.1
Travel Stop Adjustment
CAUTION: PRESSURIZED ACTUATOR
Do not turn out the travel stops completely when the actuator is pressurized.
When adjusting the travel stops and the actuator is still pressurized, the travel stops can be
“shot” away when completely turned out.
5.1.1
Double-Acting Actuators
1.
Operate valve/actuator assembly to the required "Closed" position.
2.
Remove air supply.
3.
Slacken locknut on the “closed” stop (2).
Figure 14
Stop 1
Stop 2
4.
Turn the “closed” stop clockwise to reduce or counterclockwise to increase the
travel. Consult chapter 5.1.3 (angular displacement of the pinion), to define how
far the limit stop must be turned in or out.
5.
Tighten the lock nut.
6.
Connect air and cycle the actuator to check that the position is correct.
If not repeat from 2.
7.
Remove air supply.
8.
For adjusting the open position repeat steps 1 to 7, but now for the open position
and “open” stop (1).
5.1.2
Spring-Return Actuators
1.
Connect air supply to the A port. Actuator will move to the open position.
2.
Slacken locknut (24) on the “closed” stop (2).
Figure 15
Stop 1
Stop 2
20
September 2017
Installation, Operation and Maintenance Manual
DOC.IOM.EF.EN Rev. 7
Section 5: Mechanical Stroke Adjustment
