Instruction Manual
D100714X012
461 Valve
June 2017
9
Figure 5. Installing Graphite Ribbon/Filament Packing Rings One at a Time
VALVE STEM
PACKING FOLLOWER
BONNET
TOP OF PACKING
RING EVEN WITH
BOTTOM OF
ENTRANCE
CHAMFER
INSTALLING
SECOND PACKING RING
A2207‐2
INSTALLING
FIRST PACKING RING
11. Clean the packing box and the following metal packing parts: packing follower, packing box ring, spring or lantern
ring, and, for single arrangements of PTFE V‐ring packing only, special washer (key 18).
12. Inspect the valve stem threads for any sharp edges that might cut the packing. A whetstone or emery cloth may
be used to smooth the threads if necessary.
13. Remove the protective covering from the valve body cavity, and install the liner. Install the plug and position the
new bonnet gasket (key 6) on top of the valve body. Then slide the bonnet over the stem and onto the studs (key 7).
Note
The prelubricated hex nuts (key 8) referred to in step 14 can be identified by a black film coating on the nut threads.
The proper bolting procedures in step 14 include‐‐but are not limited to‐‐ensuring that the bonnet stud threads are clean, and that
the hex nuts are evenly tightened to the specified torque values.
CAUTION
Failure to comply with good bonnet‐to‐body bolting practices and the torque values shown in table 4 may result in damage
to the valve. Cheater bars or slug wrenches should not be used for this procedure.
Hot torquing is not recommended.
14. Lubricate the stud threads, nut threads, and the faces of the hex nuts (key 8) with anti‐seize lubricant (not
necessary if new factory prelubricated hex nuts are used). Replace the hex nuts and tighten them finger‐tight.
Stroke the valve several times to center the trim. Torque the nuts in a crisscross pattern to no more than 1/4 of the
nominal torque value specified in table 4.