Flowserve SMB Series Electric Actuators - Manual (Page 37)

37
SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15
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Application Lubrication Recommendations
Main Gear Case
Inspect lubrication every 18 months or 500 cycles
– whichever occurs first.
Geared Limit Switch
Inspect lubrication every 36 months or 1000 cycles
– whichever occurs first.
Drive Sleeve Top Bearing
Lubricate every 6 months through housing cover
pressure fitting.
During an inspection, consider the following:
• Quantity—SMB and SB actuators are built to operate on the immersion principle.
a CAUTION: Ensure there is enough lubricant so that the Worm and the Worm Gear are totally
immersed in grease regardless of the position. Use the “fill” and “drain” plugs provided on the
actuator housing to verify this.
• Quality—Inspect lubricant for dirt, water, or foreign matter. If any of these are found, it is
recommended that the lubricant be replaced. This will require partial or complete mechanical
disassembly of the actuator. Repack the actuator with fresh lubricant, allowing room for thermal
expansion of the lubricant. See Section 10 for ordering replacement parts.
• Consistency—Ensure the lubricant is fluid, approximating a standard NLGI-0 grade consistency.
6.3.2 Standard Lubricant
• The SMB/SB actuator gear case is factory lubricated with an NLGI Grade 0 calcium sulfonate base
grease suitable for continuous ambient temperatures from -20°F (-29°C) to 150°F (66°C). Other
lubricants approved by Flowserve Limitorque may be used based on customer requirements. The
actuator nameplate states the original lubricant type supplied.
NOTE 1: For nuclear containment actuators, Exxon Nebula EP-0 and EP-1, or Crompton MOV-Long
Life, Grade 0 are the only approved lubricants for SMB/SB-000 through 5.
• Geared Limit Switch: Mobil 28.
• Motor Bearings: Motors furnished for Limitorque actuators are lubricated for life.
• Temperature rating is -20°F to 150°F (-29°C to 66°C).
NOTE 2: SMB/SB/SBD-000,00 standard lubricant was Sun Oil Co. (XC-421-39) for serial numbers up
to 295809. Sun 50EP (XC-421-39) should not be mixed with calcium base greases.
Table 6.1 – Approximate Volume and Weights of Lubricants
Actuator Size
Approximate Volume Approximate Weight
gallons liters lb. kg
SMB/SB-000 .32 1.2 2.7 1.2
SMB/SB/SBD-00 1.0 3.8 8.5 3.8
SMB/SB/SBD-0 1.2 4.5 10.0 4.5
SMB/SB/SBD-1 1.4 5.3 12.0 5.4
SMB/SB/SBD-2 2.7 10.2 22.3 10.1
SMB/SB/SBD-3 5.5 20.8 46.0 20.9
SMB/SB/SBD-4 9.4 35.6 75.0 34.0
SMB-5T 10.0 37.8 80.0 36.4
SMB-5 11.2 42.4 90.0 40.9