Instruction Manual
D102178X012
V260 Valve
July 2017
5
Key numbers are shown in figure 6, unless otherwise noted.
WARNING
Avoid personal injury or equipment damage from sudden release of process pressure or uncontrolled movement of parts.
Before performing any maintenance operations:
D Do not remove the actuator from the valve while the valve is still pressurized.
D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal
injury.
D 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.
D Vent the power actuator loading pressure and relieve any actuator spring precompression.
D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure
from both sides of the valve. Drain the process media from both sides of the valve.
D Dual‐seal valve constructions can retain pressure and process fluid even after process pressure has been removed from
both sides of the valve. Relieve this pressure before disassembling or removing the valve from the line. Take additional
care if the process fluid is hot, flammable, caustic, or hazardous.
D Carefully secure the valve in an upright position. The roundness of the flanges and valve body allow it to easily roll from
side‐to‐side. The combined weight of the valve/actuator assembly could cause injury or property damage when falling
to the side.
D Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
D 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.
D Avoid injury by keeping hands, tools, and other objects away from the ball while stroking the valve.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
D To avoid personal injury or property damage, a minimum of two swivel hoists must be used when lifting NPS 24 CL600
assemblies.
Packing Maintenance
Note
For the ENVIRO‐SEAL Packing System, refer to the separate ENVIRO‐SEAL Packing System for Rotary Valves instruction manual,
D101643X012
, for maintenance instructions.
Stopping Leakage
For standard PTFE V‐ring packing, leakage around the packing follower may be stopped by tightening the packing
follower nuts.
If the packing is relatively new and tight on the drive shaft, and if tightening the packing follower nuts does not stop
the leakage, the drive shaft may be worn or nicked so that a seal cannot be made. If the leakage comes from the
outside diameter of the packing, the leakage may be caused by nicks or scratches on the packing box wall. Inspect the
drive shaft and packing box wall for nicks or scratches while performing the following procedure.
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