7
of the top packing ring to the top face of the packing box.
This helps center the gland and minimizes cocking. See
Figure G4.g.
h. Permit sufficient leakage to keep the packing box running
cool. Adequate leakage at this time is a necessity. Check
the temperature of the leakage as well as the pump hous-
ing. If the pump runs hot and the leakage begins to choke
off, stop the pump and let it cool down. Steps d through h
must be repeated when the packing is adjusted.
i. Allow the pump to run 15 minutes and if leakage rate is
more than desirable, tighten the gland nuts
1
⁄
8
of a turn.
This packing adjustment is made with the pump running.
Before making another adjustment, allow the packing to
equalize against the increased pressure and the leakage
to gradually decrease to a steady rate. PUMP PACKING
MUST ALWAYS LEAK SLIGHTLY.
Note:
1. Chances are the packing will run a little warmer for the first
few days until the packing rings have burnished in. Often the
leakage rate will reduce by itself at this time.
2. Remember that the packing leakage may be warmer than the
fluid being pumped It doesn’t mean that the packing is being
damaged.
Figure G4.d
Figure G4.e
Figure G4.f
Figure G4.g
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