Flowserve L120 Series Limitorque Actuation Systems - Manual (Page 19)

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Limitorque Actuation Systems L120 Series FCD LMENIM1201-04-AQ – 05/15
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5
Operation
c WARNING: Do not manually operate the actuator with devices other than installed Handwheel and
Declutch Lever. Using force beyond the ratings of the unit and/or using additive force devices such
as cheater bars, wheel wrenches, pipe wrenches or other devices on the actuator Handwheel or
Declutch Lever may cause serious personal injury and/or damage to the actuator or valve.
a CAUTION: Do not motor-operate the valve without first setting or checking the limit switch setting
and motor direction.
• Do not force the declutch lever into hand operation. If the clutch does not easily engage, rotate
handwheel slowly while operating the declutch lever.
• Do not alternately start/stop the motor to open or close a valve which is too tight for normal
operation.
5.1 Electrical Start-up
1. Verify that the actuator has been correctly lubricated. This is particularly important if the actuator
has been in long-term storage.
2. Verify that the geared limit switch has been correctly set (see Section 4.5.1, Setting Limit Switch).
3. If the valve stem is not visible, remove the stem cover or handwheel cover plate to observe output
direction of the drive sleeve.
4. Engage manual operation and hand crank the valve well away from end of travel positions.
5. Turn on power supply and push button to “open.”
6. Check output rotation:
• If phase rotation is correct, the valve should begin to open.
• If valve begins to CLOSE, STOP immediately. Incorrect phase rotation will lead to serious damage
if the valve seats.