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Instruction Manual
May 2010
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
For the ENVIRO-SEAL Packing
System, refer to the separate
ENVIRO-SEAL Packing System for
Rotary Valves instruction manual 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.
Replacing Packing
Replacing the packing requires bleeding off the
system and removing the actuator from the valve.
Valve/actuator adjustments cannot be made
correctly without observing the fully open or closed
position of the ball (key 11). It is not necessary to
remove the valve from the pipeline, if care is taken to
note the position and alignment of the lever and
shaft and to not disturb the turnbuckle position.
Disassembly
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, shut off all pressure
Note
lines (or other power source) to the power actuator,
release pressure from the actuator, and disconnect
the pressure lines from the actuator. Use lock-out
procedures to be sure that the above measures stay
in effect while you work on the equipment.
See the WARNING at the beginning of the
Maintenance section for more information before
removing the valve from the pipeline.
2. Remove line bolting, remove the control valve
from the pipeline, and place the actuator/valve
assembly on a flat surface.
3. Remove the actuator cover. Note and mark the
orientation of the actuator with respect to the valve
body and the lever orientation with respect to the
valve drive shaft, to assist with reassembly.
4. Loosen the lever locking device cap screw.
Loosening the lever turnbuckle adjustment is not
necessary during disassembly. When remounting
the actuator, the turnbuckle will be used for actuator
adjustments.
5. Removing the actuator from the valve:
a. Remove the actuator mounting screws, bolts,
or nuts.
CAUTION
When removing the actuator from the
valve, do not use a hammer or similar
tool to drive the lever or actuator off
the valve shaft. Driving the lever or
actuator off the valve shaft could
damage the ball, seal(s), and valve.
If necessary, use a wheel puller to
remove the lever or actuator from the
valve shaft. Tap the wheel puller screw
lightly to loosen the lever or actuator.
Do not hit the screw with excessive
force. Using excessive force could
damage the ball, seal(s), and valve.
b. Slide the lever along the valve shaft while
removing the actuator from the valve.
6. If necessary, remove the bonding strap
assembly, shown in figure 2, from the valve before
attempting to remove the packing box parts.
7. Remove the packing follower nuts, packing
flange, and packing follower (keys 101, 102,
and 114, figure 3).
8. Remove the packing parts:
V260 Valve
5
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