Figure 18: Insert lantern ring
12. Install the gland nuts finger tight. Then with the lubricating supply on and the pump running, gradu-
ally tighten the gland nuts one flat at a time, while observing the leakage and stuffing box tempera-
ture. Packing requires time to run-in.
13. 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
for a properly adjusted stuffing box, depending on the shaft size and speed, varies from a few drops
per second to a small trickle out of the gland.
6.1.6 Connection of Sealing Liquid
If stuffing box pressure is above atmospheric pressure and the pumpage is clean, normal gland leakage
of 40-60 drops per minute is usually sufficient to lubricate and cool packing and sealing liquid is not re-
quired.
NOTICE:
If stuffing box is below atmospheric pressure or pumpage is not clean, an external flush should
be used to lubricate and cool packing.
An external sealing liquid is required when:
1.
Abrasive particles in the pumpage could score the shaft sleeve.
2.
Stuffing box pressure is below atmospheric pressure due to pump running when suction source
is under vacuum. Under these conditions, packing will not be cooled and lubricated and air will be
drawn into the pump. If an outside source of clean compatible liquid is required, The piping
should be connected to the stuffing box flush port inlet.
3.
If an outside source of clean liquid is required:
1.
The pressure should be 1.1-1.4 kg/cm
2
| 15-20 psi above suction pressure.
2.
Under extreme temperature and pressure a pipe should also be connected to the flush
port outlet.
NOTICE:
Most packing requires lubrication. Failure to lubricate packing may shorten the life of the pack-
ing and pump.
4.
An external drip pan (799G) drain is provided to carry away normal gland leakage.
1. Drip pan (supplied with packing only)
Figure 19: External drip pan drain
6.1 Maintenance
Model AF (42"/1200mm/54"/60"/66") LM/LMR Bearings Installation, Operation, and Maintenance Manual
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