Valve Packing
Note
These instructions apply to valves manufactured with serial numbers equal to and greater than 18679262. See Appendix A for
information on packing constructions with serial numbers less than 18679262.
If your D4 valve assembly has a packing retainer lock ring (see figure 6), proceed to Appendix A.
WARNING
Observe the warning at the start of the Maintenance section.
The valve stem packing can only be accessed from within the valve body. If packing maintenance is required, first
disassemble per steps 1, 2, and 6 or 7 in the Valve Plug and Seat Ring Disassembly section of this document.
Disassembly
1. Unscrew the packing retainer (key 10) from the bonnet (key 5).
2. Remove the five Belleville springs (key 11), packing spacer (key 14), packing (key 13), and two anti‐extrusion rings
(key 12) from the bonnet, using a formed wire hook.
3. Clean and inspect the packing box wall to ensure that the packing surfaces are not damaged. If the surface
condition is damaged, and cannot be improved by light sanding, replace the bonnet by contacting your