The following procedure covers PTFE V‐ring packing. A similar procedure can be followed for PTFE/composition packing. However, because PTFE/composition packing comes in split rings, it is possible to replace the rings without removing the actuator from the valve.Installation of graphite ribbon/filament packing requires special care to avoid trapping air between the rings. Start only one ring at a time without forcing the top of the packing ring below the bottom of the entrance chamfer of the packing box. Thus, when a ring is added, the stack should not be pushed into the cavity more than the thickness of the added ring.The arrangement of packing box parts is shown in figures 3, 4, 5, 6, and 7. Key numbers used in the following steps are shown in figures 13 and 14.1. Remove the actuator and bonnet according to steps 1 through 4 of the Disassembly procedure in the Maintenance section on page 9. 2. With the stem and valve plug assembly removed from the bonnet, remove the packing nuts (key 5), packing flange (key 3), wiper ring (key 12), and packing follower (key 13) from the bonnet. The old packing can then be pulled out with a packing hook (take care to avoid scratching the packing box wall) or pushed out using a rod inserted through the bottom of the bonnet. 3. Clean the packing box and all metal parts. 4. Complete maintenance necessary on other parts and install the bonnet on the valve as indicated in the Assembly section (starting on page 11). 5. Install the new packing and associated parts in the sequence shown in figures 3, 4, 5, 6, and 7. Be careful not to damage the packing during installation. 6. Replace the packing flange and packing flange nuts.For spring‐loaded PTFE V‐ring packing, tighten the packing flange nuts until the shoulder on the packing follower contacts the bonnet.For graphite packing, tighten the packing flange nuts to the maximum recommended torque shown in table 3. Then, loosen the packing flange nuts, and retighten them to the recommended minimum torque shown in table 3.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 3. Then, tighten the remaining flange nut until the packing flange is level and at a 90‐degree angle to the valve stem.