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Limitorque QX Electronic Actuator FCD LMENIM3306-06 – 07/14
flowserve.com
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CAUTION: Do not adjust close stop while stop is loaded. It is highly recommended that the stops be turned until
they are almost removed from the housing before setting the limits. Once the limits have been set, then the
stops maybe tightened. Refer to Figure 2.3.
Open Position Limit
8. “SET OPEN POSITION LIMIT?” is displayed on the LCD.
9. Select “YES.” The “OPEN VALVE - OK?” message is displayed.
10. Switch the actuator to “LOCAL” control and use the open/close switch to position the valve to the desired open
position.
11. Back out the open stop if needed. First loosen the screw securing the stop then move stop.
NOTE: Do not adjust open stop while stop is loaded.
12. When the valve is in the desired position, switch the actuator back to “STOP” and select “YES” again. The LCD will
read “SAVE OPEN LIMIT OK?”
13. Select “YES” if the valve’s open position limit is correct. The open position limit is set.
14. Turn the open stop against the drive sleeve, then back off the open stop from the drive sleeve approximately 0.5
to 1.5 turns, ensuring the stop does not contact the drive sleeve.
15. Once the limits have been set, electronically cycle the valve open and closed. While at each respective limit of
travel and in the motionless condition, reconfirm that the stop does not contact the drive sleeve. To confirm,
rotate the stop freely back and forth, encountering only O-ring drag. If the drive sleeve has not been loaded
against the stop, secure the stop with screw to lock it in place. If the stop is loaded by the drive sleeve, the stop
must be backed away further from the drive sleeve. If stop was in contact with the drive sleeve repeat Step 15 from
the beginning.
There must be no load on the drive sleeve before adjusting stops.
16. When “SET CLOSE POSITION LIMIT?” and “SET OPEN POSITION LIMIT?” are both completed, set calibration if
desired.
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