Disassembly and reassembly – Flowserve L120-190 through L120-2000 User Manual
Page 26
Limitorque
®
L120-190 through L120-2000 FCD LMENIM1203-00 – 10/11
26
8
Disassembly and Reassembly
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WARNING: See sections 5.1 and 5.2 Safety Precautions and Safety Practices prior to
disassembly.
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WARNING: Potential High Pressure Vessel. Before removing or disassembling your actuator,
ensure that the valve or other actuated device is isolated and is not under pressure.
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CAUTION: Turn off all power services before attempting to perform service on the actuator.
NOTE: Remove the actuator from the valve for complex work. Minor work, such as replacing geared
limit switch, torque switch or motor, may be readily performed while the actuator is still on the valve.
8.1 L120-190, -420, and -800
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WARNING: See sections 5.1 and 5.2 Safety Precautions and Safety Practices prior to
disassembly.
NOTE: The disassembly of the actuator L120–190 will be used as a general example. Always refer
to the parts drawing when disassembling. Be certain to keep all parts clean and free from dirt after
disassembly.
NOTE: Unless otherwise noted, piece numbers refer to Figures 8.1, 8.2 and 8.3 for L120-190 and -420,
and Figures 8.4, 8.5 and 8.6 for L120-800.
8.1.1 To Replace Stem Nut Only
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WARNING: Do not remove Locknut (piece #39) with actuator under load or with valve under
pressure. See Warning on Step No. 11 of Section 8.1.2 L120-190, 420, 800 Disassembly.
NOTE: If the valve must be left in service while the stem nut is replaced, the valve stem must be locked
in such a way as to prevent any movement of the valve stem.