English
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7 TORQUE LIMITING DEVICE (AQ25 / 30 / 50 only)
The actuator is protected by a torque limiting device in case of over-
torque.
If the actuator stops in a position which is not the one
desired, please check if actuator did not reach
mechanical stops or that valve has no stiff point.
Actuators are set and tested in factory according to torque stated on
orders. If no torque is specified, the actuator is supplied with
limiter set to the maximum output torque. In both of these
cases, you can adjust torque limiter if necessary.
Torque limiter operation
Please check below torque limiter setting components.
5
– Clockwise direction
cam
4
– Clockwise direction
switch
3
– Counter-clockwise
direction cam
2
– Counter-clockwise
direction switch
1
– Torque scale disk
Torque limiter is triggered as (
3
) and (
5
) cams trigger their
corresponding (
2
) and (
4
) switches when rotating.
Torque scale disk (
1
) allows to set torque limit for both directions.
It has torque graduations from 40 to 100% of the maximum
torque deliverable by the actuator.
To adjust torque, set the tip of cam to match the torque
percentage desired on the disk.
Torque scale disk is factory-set and is a reference for cams setting.
Do not modify its position or you will not be able to set the
torque limiter accurately.
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