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Baker Hughes
© 2022 Baker Hughes Company. All rights reserved.
XII. Disassembly (Cont.)
8. Remove the thrust bearing assembly and the spring
washer assembly. Mark the spring to indicate the
top of the spring, as this formation will be used in
reassembly.
9. Remove the spindle, disc and disc holder assembly
from the valve by lifting the spindle. Take care to
ensure that the disc seating surface is not damaged
from improper handling.
10. To remove the disc and disc holder from the
spindle, first insert the spindle into a vise (see
Figure 7), being careful not to damage the threaded
end of the spindle. Then, lift up on the disc holder
and turn the disc/disc holder counterclockwise to
engage the “drop-thru” threads. Once the threads
are engaged, release the disc holder and continue
to unthread and remove the disc. After the disc is
removed, lift the disc holder from the spindle.
Note:
Removal of the lift stop and/or the disc collar
from the spindle is usually unnecessary,
unless the spindle is to be replaced.
11. Measure from the top of the guide to the bushing
seat (Dimension B, Figure 8) with a depth
micrometer or other suitable measuring device.
Record Dimension B.
12. Place a scale or other thin flat metal surface against
the lower face of the upper adjusting ring and
measure from the top of the guide to the face of
the upper adjusting ring (Dimension C, Figure 8).
Record Dimension C.
13. Remove the upper adjusting ring pin from the valve
base.
14. Remove the guide and upper adjusting ring.
15. Loosen the lower adjusting pin until the pin is
slightly clear of the notches in the lower adjusting
ring. Being careful not to move the lower adjusting
ring, place a ring lap on top of the bushing seat.
(See Figure 9.) Then, using the ring pin as a
“pointer”, or reference point, rotate the lower
adjusting ring counterclockwise and count the
number of notches that pass in front of the “pointer”
until contact is made with the ring lap. Record
this information, as it will be required to correctly
reassemble the valve.
16. Remove both the lower adjusting ring pin and the
lower adjusting ring from the valve base.
17. The valve is now ready to be cleaned and the parts
inspected for proper size and condition.
B
C
SEAT
SCALE
UPPER ADJ. RING PIN
LOWER ADJ.
RING PIN
RING LAP
LOWER
ADJUSTING
RING
SEAT BUSHING
Figure 8: Bushing Seat
Figure 9: Placing a Ring Lap on Top of the
Seat Bushing