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Description of torque limit system:
All torque values are expressed as percentages.
100% corresponds to the maximum setting for the actuator.
This value is shown in Nm on the actuator nameplate.
- closing % : limits torque during closing
- close tight %: this option is only displayed if closing is on torque limit. In this case, the torque
applied on the valve seat may be not be the same as
the torque limit during the closing movement.
- open breakout %: this option is only displayed if
closing is on torque. In this case, the torque limit
to unseat the valve may be different from - generally
higher than - the torque limit during the opening
movement.
If the setting is above 100% the display shows no
limitation (equivalent to override on the torque
limiter at the start of the opening movement).
- opening %: limits torque during opening movement.
18.3 TORQUE READINGS AND COMPARISON WITH ORIGINAL
TORQUE VALUES
Maximum resistive torque values are measured for all
motorised movements and can be viewed later.
Operating torque values for a movement can be stored
in memory to allow comparison against torque values
for the most recent motorised movement.
Select change in the MENU and turn to OK to confirm.
Select torque in the CHANGE menu and turn to OK to confirm.
Select measured torque in the TORQUE menu and turn to OK
to confirm.
Select the torque value required and turn to OK to confirm.
The display shows the maximum torque value measured during
the most recent motorised movement. (note: movements are not
measured when settings are being made)
Note: Actuator settings must be made
again after making changes to the tight
torque setting (valves closing on torque)
Reminder: to save changes, exit
menus by selecting return until the
(change ok?) message is displayed
To view settings without making
changes, select check instead
of change in the menu.
MEASURED TORQUE
return
closing %
closing tight %
open breakout %
opening %
save
return
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