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Instruction Manual
D104143X012
For valves with PTFE or graphite packing:
Key numbers in this procedure are shown in figures 13, 14, and 15 unless otherwise indicated.
1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body, and drain the
process media from both sides of the valve. If using a power actuator, also shutoff all pressure lines to the power
actuator, release all pressure from the actuator. Use lock‐out procedures to be sure the above measures stay in
effect while you work on the equipment.
CAUTION
When removing the actuator in the following step, use a wheel puller to separate the actuator parts from the valve shaft.
Do not drive the actuator parts off the valve shaft because this could damage valve trim components.
2. Remove the actuator per instructions in separate actuator instruction manuals, then remove the cap screws (key
31). Remove the clamp (key 33, figure 7) if the strap (key 34, figure 7) is used.
3. Remove the packing flange nuts (key 27) and the packing flange (key 25) and pull out the packing follower (key 24).
4. Remove the anti‐blowout ring, if used (NPS 3-8) (key 23) from the drive shaft (key 7).
5. Remove the old packing rings (key 22) and the packing box ring (key 21). Carefully avoid scratching the shaft or
packing box wall to avoid damage that could cause leakage around the shaft. Clean all accessible metal parts and
surfaces to remove particles that would prevent the packing from sealing.
WARNING
Do not lubricate parts when used in oxygen service, or where the lubrication is incompatible with the process media. Any
use of lubricant can lead to the sudden explosion of media due to the oil/oxygen mixture, causing personal injury or
property damage.
6. Use the appropriate procedures below for installing packing.
D Install the packing as shown in figure 8. For NPS 3-8, two packing box rings (key 21) are used on the top and bottom
of the packing set (see figures 8, 13, and 14 for details). For NPS 10-24, only one packing box ring (key 21) is used on
the bottom of the packing set, at the end closest to the disk (see figure 15 for details).
D With graphite ribbon packing, stack the packing rings and packing washers together, and slide the stack into the
packing box as far as it will go while carefully avoiding trapping air between the rings.
D Install the anti‐blowout ring, if used (NPS 3-8) (key 23) in the groove on the drive shaft (key 7).
D Install the packing follower and the packing flange.
D Install the packing flange nuts, and tighten them only far enough to stop leakage under normal operating
conditions.
D For oxygen service applications, attach the bonding strap assembly (key 34, figure 7) to the shaft with the clamp
(key 33, figure 7), and connect the other end of the bonding strap assembly to the valve body with a cap screw (key
31).
7. Mount the actuator and adjust the closed position of the valve, per the Actuator Mounting section on page 22 of
this manual, before returning the valve to service.
8. When placing the control valve into operation, check around the packing follower for leakage; retighten the
packing flange nuts as required according to accepted bolting procedures.
CL600 Control-Disk Valve
January 2019
13
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