Installation instructions – Flowserve L120 Series Limitorque Actuation Systems User Manual
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Limitorque Actuation Systems L120 Series FCD LMENIM1201-04-AQ – 05/15
flowserve.com
4
Installation Instructions
4.1 Safety Precautions
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WARNING: Read this Installation and Maintenance Manual carefully and completely before
attempting to install, operate, or troubleshoot the Limitorque L120 actuator.
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WARNING: Be aware of electrical hazards. Turn off incoming power before working on the actuator
and before opening the switch compartment.
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WARNING: Potential HIGH-PRESSURE vessel – Be aware of high-pressure hazards associated with
the attached valve or other actuated device when installing or performing maintenance on your
L120 actuator. Do not remove the actuator mounting bolts when the actuator is mounted on a rising
stem valve unless the valve is in the FULLY OPEN position and there is NO pressure in the line.
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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.
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WARNING: Do not work on the actuator while it is mounted on a torque-seated valve.
4.2 Safety Practices
The following checks should be performed to maintain safe operation of the L120 actuator.
• Mount motors on a horizontal plane, if possible.
• Keep the switch compartment clean and dry.
• Keep the valve stem clean and lubricated.
• Set up periodic operating schedule for infrequently used valves.