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•
Valve stem is clean and well lubricated
•
Valve stem does not jam in the nut
•
Valve stuffing box is not too tight
7.2
Torque limiter adjustment
Torque scale sectors are factory-set and are a reference for cams setting. Do
not modify their position or you will not be able to accurately adjust torque
limiter anymore.
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, torque limiter can still be adjusted if necessary.
To adjust torque limits, set the tip of cams to match the desired
percentage of maximum torque (see How to set a cam page 17):
• For closing torque
limit, set tip of cam (1)
on
the
desired on the CLOSE
scale
• For opening torque
limit, set tip of cam (2)
on
the
desired on the
scale
On the opposite figure, closing
torque limit is 100%, opening
torque limit is 70%.
percentage
percentage
OPEN
22
Opening torque set
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