V150S Slurry VeeBall Valve
Instruction Manual
November 2010
5
Maintenance
WARNING
The V-notch ball closes with a
shearing, cutting motion, which could
result in personal injury. To avoid
injury, keep hands, tools, and other
objects away from the V-notch ball
while stroking the valve.
Avoid personal injury from sudden
release of process pressure. Before
performing any maintenance
operations:
D
Do not remove the actuator from
the valve while the valve is still
pressurized.
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
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
Vent the power actuator loading
pressure and relieve any actuator
spring precompression.
D
Use lock-out procedures to be
sure that the above measures stay in
effect while you work on the
equipment.
D
Always wear protective gloves,
clothing, and eyewear when
performing any maintenance
operations to avoid personal injury.
D
The valve packing area 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.
D
Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
Packing Maintenance
1. It is recommended that the valve be removed
from the line when replacing packing to allow correct
set up of the actuator after actuator removal.
2. Remove the packing follower nuts and packing
follower (keys 18 and 16).
3. Remove the packing parts (see figure 4 and
keys 15 and 14) using a purposed designed packing
extraction tool to avoid damaging the packing box
bore and shaft surfaces.
4. Install the new packing parts using the sequence
shown in figure 4. Fit the packing follower (key 16).
Fit nuts (key 18).
5. Tighten the packing nuts to compress the packing
to seal for operating conditions. At the same time
push the ball and shroud on the drive end against
the valve body inside location face to center the ball.
This can be done by using a lever (wood) against
the inside ball lug face and the valve body liner inlet.
Disassembly
WARNING
Observe the steps in the WARNING at
the beginning of the Maintenance
section.
Reference figures 9 and 10.
CAUTION
Trim parts are made from brittle
material, handle with care to avoid
chipping or breakage.
1. Remove the actuator cover (where applicable).
Take note of the orientation of the actuator with
respect to the valve body and the lever orientation
with respect to the valve drive shaft.
2. Remove the actuator.
3. Remove the flow ring retainer screws, clips and
flow ring retainer (keys 22, 23, and 5).
4. Knock or press out the flow ring (key 4).
5. Position the ball to allow access to the shaft pins.
Use a modified parallel pin punch (figure 7) to to
knock out the shaft pins, (key 10) through the shaft
and ball lugs.
Note
The punch dimensions should be as
per table 6 to avoid damaging the ball
