Emerson Process Management instruction manual Baumann 51000 Series Instructions, Maintenance

	Instruction
Baumann™ 51000 Series Instructions	51.LF:IM
	April 2007

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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.

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Personal injury could result from packing leakage. Valve packing is tightened before shipment; however, the packing might require some readjustment to meet specific service conditions.

MAINTENANCE

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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 fluids that are pressurized, even when the valve has been removed from the pipeline. Process fluids 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.

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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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