to effectively seal a moving joint. Figure 9-61
shows several types of packing in common use
Packing is inserted in STUFFING BOXES
that have annular chambers located around valve
stems and rotating shafts. The packing material
is compressed to the necessary extent and held in
place by gland nuts or other devices.
9-61.Types of packing.
A corrugated ribbon packing has been
developed for universal use on valves. This
packing comes in four widths (1 inch, 3/4 inch,
1/2 inch, and 1/4 inch) and is easily cut to
length, rolled on the valve stem, and pushed
into the stuffing box to form a solid, endless
packing ring when compressed (fig. 9-62).
Corrugated ribbon packing is suitable for use
in systems of high temperatures (up to 1200°F