October 2020
Installation, Operation and Maintenance Manual
MAN-10-04-100-0711-EN Rev. 0
16
Installation
Section 4: Installation
4.6 Setting of the Angular Stroke: Mechanical Stops
It is important for the mechanical stops to end the angular stroke at both extreme
valve positions (fully open and fully closed). The setting of the angular stroke is
performed by adjusting the travel stop screw mounted on the actuator housing.
For the adjustment of the stop screw proceed as follows:
• Loosen the lock nut
• Screw 1: open
To set the mechanical stop in opening, manually bring the actuator to the
completely open position, then turn screw 1 clockwise to nd the correct
position, then block it by means of the nut
• Screw 2: close
To set the mechanical stop in closing, manually bring the actuator to the
completely close position, then tighten screw 2
If the actuator angular stroke is stopped before reaching the end position
(fully open or closed), proceed as follows:
• Unscrew the stop screw by turning it anticlockwise until the valve reaches
the correct position
• When unscrewing the stop screw, keep the lock nut still with a wrench so that
the sealing washer does not withdraw together with the screw
• Tighten the lock nut
If the actuator angular stroke is stopped beyond the end position (fully open or closed),
proceed as follows:
• Screw the stop screw by turning it clockwise until the valve reaches the correct position
• Tighten the lock nut
Figure 8 Setting of the Mechanical Stop
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