Instruction Manual
D104197X012
NPS 8 CHP Valve
September 2016
4
WARNING
Avoid personal injury or damage caused by uncontrolled movement or dropping of the assembly valve:
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Swivel hoist rings are sized to lift only the valve and actuator. Do not attached piping or other structures to the valve
and actuator assembly when lifting swivel hoist rings.
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Take appropriate precautions to avoid unbalanced loading which may result in sudden swinging or movement of the
assembled unit, including additional lifting and/or support methods when necessary.
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Do not use eyebolts when lifting the valve or valve actuator assembly due to variable loading angles inherent to valve
maintenance and installation.
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Failure to utilize safe lifting practices may result in equipment damage and/or personal injury.
Lifting Valve/Actuator Assembly
To lift the assembly, insert swivel hoist rings (recommend ¾ -10 UNC) into the four lifting hole locations on the outside
diameter of the bonnet flange. The lifting point must be high enough away from the top of the accessory mountings
to prevent damage to accessories or piping. When lifting the valve and actuator assembly, a strap around the actuator
may be required to ensure lifting stability. Lifting the assembly without using the hoist rings is not preferred.
Lifting Bonnet Only
To lift the bonnet, insert swivel hoist rings (recommend ¾ -10 UNC) into the four lifting hole locations on the outside
diameter of the bonnet flange. Use proper length, or adjustable chains to ensure the bonnet and valve body mating
surfaces remain parallel when hoisted.
Maintenance
Valve parts are subject to normal wear and must be inspected and replaced as necessary. Inspection and maintenance
frequency depends on the severity of service conditions. This section includes instructions for packing maintenance
and trim maintenance. All maintenance operations may be performed with the valve in the line.
WARNING
Avoid personal injury or damage to property from sudden release of pressure or uncontrolled process fluid. Before starting
disassembly:
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Do not remove the actuator from the valve while the valve is still pressurized.
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Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal
injury.
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Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the
actuator cannot suddenly open or close the valve.
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Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure
on both sides of the valve. Drain the process media from both sides of the valve.
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Vent the power actuator loading pressure and relieve any actuator spring precompression.
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Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
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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.
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Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
