27
10 TORQUE LIMITING DEVICE (EXCEPT ON
AQ5/10/15)
If the actuator stops on a position which is not the one required,
please check that the actuator did not reach a mechanical stop or
that the valve has no stiff point.
Actuators are set and tested in our factory according to the torque
stated on the order. If no torque is specified, the actuator is supplied
with the limiter set to the maximum output torque (100%).
In both cases, you can adjust the torque limiter if necessary.
10.1 Torque limiter operation
The actuator is protected by a torque limiting device in case of over-
torque.
4 - Closing direction torque scale
3 - Opening direction torque scale
2 – Counterclockwise direction cam
1 - Clockwise direction cam
The torque limiter is triggered when cams (1) or (2) trigger their
corresponding switches when rotating.
The torque limiter is fitted with 2 scale disks (3) and (4) to adjust
the torque limit for both directions. They have torque graduations
from 40 to 100% of the maximum torque deliverable by the actuator.
The torque limiter provides a maintained contact.
To Next Page
Loading...
Need help?
General
