Emerson Bettis M Series - Section 12: Important Safeguards; Critical Safety Precautions

Installation, Operation and Maintenance Manual
MAN-02-01-39-0704-EN Rev. 0 July 2019
Important Safeguards
Section 12: Important Safeguards
CAUTION: TO REDUCE THE RISK OF INJURY
• Read the entire Operation and maintenance Instruction manual before installing,
operating, or servicing this actuator.
• Inspect the actuator regularly for signs of corrosion and repair immediately.
• Always remove pressure and disconnect power supply before servicing the actuator.
• Keep hands and feet clear of an actuator that is in service.
• Do not disassemble the actuator without reviewing the disassembly procedure in
this manual rst. This is particularly important that the proper procedure be
followed to avoid injury from internal spring power.
• Before attempting to remove an actuator from the equipment it is assembled to,
always be sure that spring is in the “failed” or extended position. Remove any
accessory equipment that may cause the spring to be cocked. If there is any doubt
that the actuator is in the “failed” position, remove the air pressure from the
actuator and install a long threaded bolt (a bolt that exceeds the length of the
cylinder) in place of both travel stops. Once the actuator has been removed
from the equipment the long bolts must be removed rst before the actuator can
be disassembled.
• Repair or replace a damaged actuator immediately.
• Inspect the vent valves on models 1480 – 2380 during regular maintenance periods.
The valves should allow leaking uids to escape but prevent contaminates from the
surrounding atmosphere from entering the actuator. Fluid leaking from the lower
valve indicates a valve stem seal leak. Fluid leaking from the upper valve indicates a
leaking cylinder seal. If leakage is observed from either valve disassemble and repair
the source immediately. Never replace the vent valves with plugs.
• Operate the actuators within the pressure and temperature ranges specied on
the nameplate. Otherwise the actuator life may be reduced or serious safety hazards
may develop.
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Section 12: Important Safeguards