
HIGH PRESSURE CONTROL VALVE
Installation, Operation & Maintenance Guide
15
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Model: PO, PC
INSPECTION
Seat
Check for scoring or scratches on the inside diameter.
If the seal shows any indication of leakage.
See Fig. 11-2
Packing Box & Body
Replace the O-Ring.
Inspect the O.D. threads for nicks, burrs and flats.
Inspect the I.D. threads for nicks, burrs and flats.
A thread repair tool may be used for light
damage, but Packing Box will need to be
replaced for moderate to heavy damage.
See Fig. 11-3 & Fig. 11-4
Ball and Stem
Inspect the ball for pits and or grooves, and inspect
the Stem for extensive scoring or scratches. Check
for any bends on the Stem.
See Fig. 11-1
Inspect Seating area in Body
for any washouts or nicks
11 Inspection & Cleaning
Replace If the Packing Box shows excessive
corrosion and wear.
Remove O-Ring from Packing Box.
Remove Follower from the Packing Box.
Check Point
Verify the Packing-Assembly and Follower are
properly Seated in the Packing Box. Failure to
do so could lead to Packing-Sleeve damage
upon Stem installation. A socket is a handy and
safe tool to perform this action.
Fig. 11-1
Fig. 11-2
Fig. 11-3
Fig. 11-4