Xylem 9100 Series Base Mounted Centrifugal Fire Pumps AC8585 REV.C User Manual
Page 26
4. PACKING SEAL
When a pump with packing is first started it is
advisable to have the packing slightly loose
without causing an air leak. As the pump runs
in, gradually tighten the gland bolts evenly.
The gland should never be drawn to the point
where packing is compressed too tightly and
no leakage occurs. This will cause the
packing to burn, score the shaft sleeve and
prevent liquid from circulating through the
stuffing box cooling the package.
NOTE: Eccentric run-out of the shaft or
sleeve through the packing could result in
excessive leakage that cannot be
compensated for. Correction of this defect
requires shaft and/or sleeve replacement.
Packing should be checked frequently and
replaced as service indicates. Six months
might be a reasonable expected life,
depending on the operating conditions.
5. CLEANING WITHOUT DISMANTLING PUMP
A short section of pipe so designed that it can
be readily dropped out of the line can be
installed adjacent to the suction flange. With
this arrangement, any matter clogging the
impeller is accessible by removing the pipe
section.
If the pump cannot be freed of clogging after
the above methods have been tried,
dismantle the unit as previously described to
locate the trouble.
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