Emerson Process Management 51000 - Manual (Page 2)

2
Instruction
51.LF:IM
April 2007
Baumann ™ 51000 Series Instructions
If you move or work on an actuator
installed on a valve with loading
pressure applied, keep your hands
and tools away from the stem travel
path to avoid personal injury. Be
especially careful when removing the
stem connector to release all loading
on the actuator stem whether it be
from air pressure on the diaphragm
or compression in the actuator
springs.
Likewise take similar care when
adjusting or removing any optional
travel stop. Refer to the relevant
actuator Maintenance Instructions.
If hoisting the valve, take precautions
to prevent personal injury or
property damage that could result
if the rigging slips. Be sure to use
adequate sized hoists and chains or
slings to handle the valve.
Personal injury could result from
packing leakage. Valve packing is
tightened before shipment; however,
the packing might require some
readjustment to meet specifi c service
conditions.
MAINTENANCE
Avoid personal injury or property
damage from sudden release of
process pressure or bursting
of parts. Before performing any
maintenance operations:
• Always wear protective gloves,
clothing, and eye wear when
performing any maintenance
operations to avoid injury.
• Disconnect any operating lines
providing air pressure, electric
power or a control signal to the
actuator. Take precautions to
prevent actuator from suddenly
opening or closing the valve.
• Use bypass valves or completely
shut off the process to isolate the
valve from the process pressure.
Relieve the process pressure from
both sides of the valve.
• Depending on the actuator
construction, it will be necessary
to manage the pneumatic actuator
spring pre-compression. It is
essential to refer to the relevant
actuator instructions in this manual
to perform safe removal of the
actuator from the valve.
• Use lock-out procedures to be
sure that the above measures stay
in effect while you work on the
equipment.
• The valve packing box may contain
process fl uids that are pressurized,
even when the valve has been
removed from the pipeline. Process
fl uids may spray out under pressure
when removing the packing
hardware or packing rings, or when
loosening the packing box pipe
plug.
• Whenever a gasket seal is disturbed
by removing or shifting gasketed
parts, install a new gasket during
reassembly. This provides a good
gasket seal because the used
gasket may not seal properly.
Avoid personal injury or property
damage by thoroughly cleaning the
line of all dirt, welding chips, scale,
oil or grease, and other foreign
material. Failure to do so could result
in damage to the seating and sealing
surfaces of the valve and result in
damage to the valve and release of
process materials.
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