2 safety practices, 3 actuator preparation – Flowserve SMB Series Electric Actuators User Manual
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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15
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CAUTION: Do not use oversized motor overload heaters. Instead, look for the cause of the
overload.
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CAUTION: Do not operate the valve under motor operation without first setting or checking the
limit switch setting and motor direction.
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CAUTION: Do not force the declutch lever into the motor operation position. The lever returns to
this position automatically when the motor is energized.
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CAUTION: Do not depress the declutch lever during motor operation to stop valve travel.
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CAUTION: Do not use replacement parts that are not genuine Flowserve Limitorque parts, as
serious personal injury and/or damage to the actuator and valve may result.
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CAUTION: Do not lift actuator/gearbox or actuator/valve combinations with only the eye bolts in
the SMB actuator. These eye bolts are designed for lifting the SMB actuator only.
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CAUTION: Do not lift the actuator by the handwheel
4.2 Safety Practices
The following check points should be performed to maintain safe operation of the SMB or SB
actuator:
• Eye bolts in SMB and SB actuators are designed for lifting only the actuator and not associated
gearboxes or valves.
• Mount the actuator with the motor in a horizontal plane, if possible.
• Keep the switch compartment clean and dry.
• Keep the valve stem clean and lubricated.
• Set up a periodic operating schedule for infrequently used valves.
• Verify all actuator wiring is in accordance with the applicable wiring diagram.
• Carefully check for correct motor rotation direction. If the valve closes when open button is
pushed, the motor leads may have to be reversed.
• Verify the stem nut is secured tightly by the locknut and that the top thread of the locknut is
crimped or staked in two places.
• Use a protective stem cover. Check valve stem travel and clearance before mounting covers on
rising stem valves.
4.3 Actuator Preparation
Replace all molded plastic conduit and top protectors (installed for shipping purposes only) with
metal pipe plugs when installation wiring is complete.