AUMA Part-turn gearboxes GS 50.3 - 250.3, primary reduction gearings VZ 2.3 - 4.3_GZ 160.3 - 250.3 - Manual (Page 14)

Limit seating in end position CLOSED
.
Turn back the valve from the end position by an amount equal to the overrun.
.
Set limit switching according to the operation instructions SA/SAR.
.
Check torque switching for end position CLOSED according to the operation
instructions SA/SAR, and, if necessary, set to the required value.
Torque seating in end position CLOSED
.
Turn handwheel counterclockwise by approx. 4 – 6 turns.
.
Set limit switching for the end position CLOSED according to the operation
instructions SA/SAR (for actuator indication). .
Check torque switching for end position CLOSED or set to the required value.
Setting end position OPEN The end stop need not be set since the required swing angle has been set in the
factory. .
Move gearbox to the end stop in position OPEN.
The last part of the travel has to be made manually.
.
To turn the valve back manually from the end position by an amount equal to the
overrun, proceed as follows:
For actuators mounted directly:
by approx. 4 to 6 turns at the handwheel.
With mounted primary reduction gearing VZ/GZ:
by approx. 10 to 15 turns at the handwheel, according to the reduction ratio of
the primary reduction gearing.
.
Set limit switching in actuator for the end position OPEN according to the
operation instructions SA/SAR.
If the swing angle does not match, refer to section 10.
9.2 Worm gearboxes on ball valves
In case end stops require adjustment, set end position OPEN first.
If the exact end position of the valve cannot be seen through a
position marking at the valve shaft, the setting may have to be
done with the valve removed.
.
Determine overrun of the actuator for both directions, i. e. how much does the valve
move after the motor has been switched off?
14
Worm gearboxes GS 50.3 – GS 250.3 Operation instructions
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10 1
Figure F: End stop up to GS 125.3
03/04
10 1
Figure G: End stop from GS 160.3