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Installation Instructions
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WARNING: Read this Installation and Maintenance Manual carefully and completely before
attempting to store, install, operate or troubleshoot your Limitorque valve actuator. Be aware of
electrical hazards within the actuator and high pressure hazards of the attached valve or other
actuated device when installing or performing maintenance on your L120-85 actuator.
NOTE: If your actuator incorporates a rising stem application, it may be shipped with a plastic cap over
the Drive Sleeve Housing. If so, in order to store without possible corrosion occurring, install a pipe plug
or protective stem cover to protect the Drive Sleeve Housing.
NOTE: Failure to comply with recommended storage procedures could cause the warranty to be voided.
For long-term storage procedures, consult the Limitorque Customer Service Department.
4.1 Actuator Mounting
Your L120-85 is designed to perform actuation for torque only applications (drive 1) or for torque and thrust
applications (drive 2). If you are using a torque only configuration, before installing on the valve or other actu-
ated device, you will need to verify that the Torque Drive Nut (piece 95) is properly bored and keyed to fit your
valve stem. If you are using a torque and thrust configuration, you will need to verify that the Thrust Base
Drive Sleeve (piece 101) is properly threaded to fit your threaded valve stem. Use the following procedures to
check for proper fit of the Torque Drive Nut or the Thrust Base Drive Sleeve.
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Limitorque L120-85 Installation, Operation and Maintenance FCD LMENIM1202-03-A4 – 06/15
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