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Instruction Manual
D100398X012
12. Slide the packing follower, upper wiper, and packing flange (keys 13, 12, and 3, figure 14) into position. Lubricate
the packing flange studs (key 4, figure 14) and the faces of the packing flange nuts (key 5, figure 14). Install the
packing flange nuts.
13. For spring‐loaded PTFE V‐ring packing, tighten the packing flange nuts until the shoulder on the packing follower
(key 13, figure 14) contacts the bonnet.
For graphite packing, tighten the packing flange nuts to the maximum recommended torque shown in table 4. Then,
loosen the packing flange nuts, and retighten them to the recommended minimum torque shown in table 4.
For other packing types, tighten the packing flange nuts alternately in small equal increments until one of the nuts
reaches the minimum recommended torque shown in table 4. Then, tighten the remaining flange nut until the
packing flange is level and at a 90‐degree angle to the valve stem.
For ENVIRO‐SEAL or HIGH‐SEAL live‐loaded packing, refer to the note at the beginning of Packing Maintenance.
14. Mount the actuator on the valve assembly and reconnect the actuator and valve stem according to the procedure
in the appropriate actuator instruction manual.
Figure 6. TSO (Tight Shutoff Trim), Detail of Protected Soft Seat
Trim Maintenance
WARNING
Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.
Except where indicated, key numbers in this section are referenced in figure 16 for standard NPS 1 through 6
constructions, figure 17 for Whisper Trim III detail, figures 18 and 19 for WhisperFlo trim, and figure 20 for Cavitrol III
detail and the NPS 8 ET valve.
Disassembly
1. Remove the actuator and the bonnet according to steps 1 through 6 of the Replacing Packing procedure in the
Maintenance section.
INNER PLUG
PROTECTED SOFT SEAT
SEAT RING
A7088
OUTER PLUG
CAGE
ET Valve
November 2017
11
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