Flowserve SMB Series Electric Actuators - Manual (Page 35)

35
SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15
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6
Maintenance
6.1 Routine Maintenance
c WARNING: See Section 4.1 and 4.2 for Safety Precautions and Safety Practices before
performing maintenance.
NOTE: A routine maintenance check should be performed every 18 months as a minimum. The
frequency can increase based upon the frequency of operation and the ambient environmental
conditions.
The routine maintenance check consists of the following:
1. Remove the limit switch compartment and/or control cabinet cover. Inspect for moisture. If
moisture is present, dry the compartment and the components.
2. Inspect all electrical controls and contacts in the limit switch compartment and/or control
cabinet. Wipe clean all electrical contacts with electrical-type solvent cleaner similar to CRC
Lectra Clean and remove foreign residue.
3. Check armature brushes for proper contact and wear when DC motors are employed.
4. Verify all terminal connections are tight.
5. Clean gasketed surfaces on limit switch compartment and/or control cabinet cover. Inspect
gaskets and seals for damage. Replace all damaged gaskets or seals for weatherproof and
submersible units. Wipe a coating (approximately two mils) of lightweight bearing grease on
surfaces of explosionproof cover flanges for protection.
6. Inspect lubricant in accordance with Section 6.3.1, Lubrication Inspection. Visually check shaft
penetrations for indications of seal leakage. If abnormal leakage is found, replace the seal.
NOTE: Slight oil weepage is not a cause for seal replacement. See Section 6.2, Major Maintenance.
7. Megger test the motor—1 megaohm or higher is considered normal.
8. Clean and lubricate the valve stem for rising stem applications in accordance with the valve
manufacturer’s lubricant recommendation.