page 15
SEAL/DISC KIT:
For 3-inch through 8-inch valves, the Seal/Disc Repair Kit consists of two (2) Inner Bushing O-rings (418), two (2)
Bonnet O-rings (429), and one (1) Bonnet Gasket (412), one (1) Disc (413), one (1) Disc Bushing (403), one (1) Disc Washer
(402), one Disc Lock Washer (423)*, and one (1) Disc Nut (401).
Note:
When ordering, specify whether your valve is resilient seated or metal seated. For 10-inch and 12-inch valves,
two (2) Bonnet O-rings (429). Two (2) Hinge Connectors (430), two (2) Retaining Washers (431) and two (2) Shaft Spacers
(432) are also required for assembly. (See figure 7) No Disc Bushing is required for the Disc Assembly.
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).
c.
Valve sizes 10-inch and 12-inch, equipped with a lever, have two (2) Inner Bushing
O-rings(418), 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.
Slide the Shaft-Hinge-Disc assembly from the bonnet (407).
5.
Remove the Disc Nut (401) , Disc Bushing (403) Disc Washer (402), and Disc Lock Washer (423)* to
remove Disc (413) from Hinge (404).
NOTE: On 10-inch and 12-inch valves, a tab on the Disc Lock Washer must be bent to remove the lock
washer. ( See figure 7 )
6.
Reassemble the Shaft-Hinge-Disc assembly as shown in figure (9). Tighten Disc Nut (401) until the Disc
Lock Washer (423) is flat. On 10-inch and 12-inch valves, bend the appropriate tab on the Disc Lock
Washer to secure the Disc Nut.
NOTE
: On 3-inch through 8-inch valves, insure that the thrust plate on the Disc (413) is located at the 6
o-clock position. ( See Detail "A", figure 10 ). On 10-inch and 12-inch valves, the Disc can only be mounted
as shown in figure (7).
7.
Insert the rebuilt Shaft-Hinge-Disc assembly into the valve bonnet (407). Ensure the disc is facing the
proper direction. Refer to figure (7) for proper positioning of 10-inch and 12-inch valve components.
8.
Install the new O-rings as shown in figures (7 or 9). Installing the Inner Bushing O-rings can best be
accomplished with a good set of small picks. Be careful not to cut the O-rings during installation.
9.
Install the bushings in the valve bonnet (407) and tighten to 45-ft-lbs.
10.
Install the rebuilt head assembly according to "REASSEMBLY AFTER INSPECTION" above.
*
As of March 1st, 2008 on 3" through 8" valves, the Disc Lock Washer (423), and Disc Nut (401), are replaced by a new
self locking Disc Nut (401).
