MIL-HDBK-1164
Table 16
Guide for Stuffing Box Inspection
Inspection/
Procedure
Action
(1),(2)
Inspect stuffing box
Ensure that stuffing box glands are moving
SA
freely and that gland bolts and nuts are oiled.
Check for excessive leakage that cannot be
reduced by gland adjustment; if found, proceed
according to the steps below:
Remove old
a) Remove old packing and clean box. If the
V
packing
box has a seal cage, make sure it is located
opposite the sealing liquid inlet.
b) Use packing recommended by manufacturer.
c) Measure the depth of box and sealing liquid
inlet tap. Place enough rings of packing in the
bottom of the box that seal cage is in proper
position once packing is compressed. Do not
try to pack a pump by renewing only the last
three or four rings.
Check packing ring
a) Make sure the packing ring joints are
V
joints
staggered.
Add new packing
a) Cut the packing so that the joints are square
V
after the packing is bent around the shaft.
Packing should be cut about 1/16 inch longer
than measured to be sure that the outside
diameter of the ring hugs the stuffing box wall
rather than the sleeve. Use care in cutting the
rings.
b) Except as detailed below, use the follower
gland and a few convenient equal-length
spacers to compress each ring firmly into place
before inserting the next ring.
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