422
429
418
407
412
417
Fig. 9
Seal Repair, Seal/Disc
Kit Components
402
413
403
401
404
page 14
REPAIR PROCEDURES - continued:
SEAL REPAIR KIT:
The Seal Repair Kit consists of two (2) Inner Bushing O-rings (418), two (2) Bonnet O-rings (429). The Inner Bushing
O-rings are not used on valves without a lever. 10-inch and 12-inch valves have Bonnet O-rings (429).
1.
Remove the head assembly as described under DISASSEMBLY FOR INSPECTION above.
2.
Remove the bushings. For valves with a lever, one bushing is open (417) and one bushing is closed (422).
For valves without a lever, both bushings are closed (422).
3.
Remove the old O-rings from each bushing and replace with new O-rings.
a.
Valve sizes 3-inch through 8-inch, without a lever, have Bonnet O-rings (429) only.
b.
Valve sizes 10-inch and 12-inch without a lever have two two (2) Bonnet O-rings (429) only.
c.
Valve sizes 10-inch and 12-inch, equipped with a lever, have two (2) Inner Bushing O-rings
(418), located inside the Open Bushing (417) and two (2) Bonnet O-rings (429).
d.
3-inch through 8-inch valves equipped with a lever, have two (2) Inner Bushing O-rings
(418) located inside the Open Bushing (417) and two (2) Bonnet O-rings (429).
4.
Install the new O-rings as shown in figure (7) for 10-inch and 12-inch, figure (9) for 3-inch through 8-inch.
Installing the Inner Bushing O-rings (418) can best be accomplished with a good set of small picks. Be
careful not to cut the O-rings during installation.
5.
Install the bushings in the valve Bonnet (407) and tighten to 45-ft-lbs.
6.
Install the rebuilt head assembly according to "REASSEMBLY AFTER INSPECTION" above.
