17
Installation and Maintenance Instructions
MAN-02-04-99-0712-EN Rev. 1
February 2020
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 valve position
extremes (i.e. fully open and fully closed). 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 for opening, manually bring the actuator to the
completely open position, and then turn screw 1 clockwise to find the correct
position, and then lock screw 1 down using the nut
•
Screw 2: close
To set the mechanical stop for closing, manually bring the actuator to the
completely closed position, and 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 counter-clockwise until the valve reaches the
correct position
•
When unscrewing the stop screw, keep the lock nut still with a wrench such 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
SCREW 1
CCW/OPEN/STOP
SCREW 2
CCW/CLOSED/STOP
