ITT Goulds Pumps AF, Инструкции по установке, эксплуатации и обслуживанию

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40 AF (6-36) IOM
CAUTION
Never mix greases of different consistency (NLG 1
or 3 with NLG 2) or different thickener. For
example never mix a lithium base grease with
polyurea base grease.
Pumpage temperatures above 350
°
F (177
°
C) should
be lubricated by a high temperature. Mineral oil
grease. Mineral oil greases should have oxidation
stabilizers and a consistency of NLGI 3.
MAINTENANCE OF SHAFT SEALS
MECHANICAL SEAL
When mechanical seals are furnished, a
manufacturer’s reference drawing is supplied with the
data package. This drawing should be kept for future
use when performing maintenance and adjusting the
seal. The seal drawing will also specify required flush
piping attachment points. The seal and all flush piping
must be checked and installed as needed prior to
starting the pump.
The life of a mechanical seal depends on various
factors such as cleanliness of the liquid handled and its
lubricating properties. Due to the diversity of operating
conditions it is, however, not possible to give definite
indications as to its life.
WARNING
Never operate the pump without liquid supplied to
the mechanical seal. Running a mechanical seal
dry, even for a few seconds, can cause seal
damage and must be avoided. Physical injury can
occur if the mechanical seal fails.
PACKED STUFFING BOX
If the axial flow pump has a stuffing box that seals the
rotating shaft the packing rings were installed at the
factory, but at some point during the life of the pump
they must be replaced. The following steps are used to
replace the packing:
1. Drain the system or isolate the pumpage from the
pump before replacing the packing.
2. Remove the nuts from the gland studs that hold the
gland in place.
3. Use a packing puller remove the first (3) rows of
packing from the box.
4. Use threaded rods or a packing puller to remove
the lantern ring from the box.
5. Use a packing puller remove the final (2) rings of
packing from the box.
6. Clean the stuffing box of any grit or build-up.
Clean the shaft sleeve prior to replacing the
packing. If the sleeve is damaged, now is the
time to replace it.
7. Install the packing and lantern ring in the reverse
order of removal, 2 rings of packing, lantern ring,
3 rings of packing, and the gland. Firmly seat
each ring. Stagger joints in each ring 90
°
. Make
sure center of lantern ring lines up with flush tap
in the stuffing box.
8. Die formed packing rings are used when re-
packing a box. Care must be used during their
installation. To install packing, twist the ring
sideways just enough to get it around the shaft.
Do not attempt to pull rings straight out, see Fig.
26.
9. Insert the lantern ring with tapped extractor holes
facing outward from the box, be sure it is aligned
with the flush ports in the stuffing box, see Fig. 27.
10. Install the gland nuts finger tight. Then with the
lubricating supply on and the pump running,
gradually tighten the gland nuts one flat at a time,
while observing the leakage and stuffing box
temperature. Packing requires time to run-in.
11. Allow a minimum of ½ hour between adjustments.
If the leakage is reduced quickly, the packing will
overheat and may be destroyed. The shaft sleeve
may also become damaged. The normal leakage
PACKING RINGS
CORRECT
INCORRECT
Fig. 26
!
!