ITT Goulds Pumps IC, Инструкция по установке, эксплуатации и обслуживанию

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Seal flushing methods
Table 5: You can use these methods in order to flush or cool the seal:
Method Description
Product flush Run the piping so that the pump pushes the pumped fluid from the
casing and injects it into the seal gland. If necessary, an external heat
exchanger cools the pumped fluid before it enters the seal gland.
External flush Run the piping so that the pump injects a clean, cool, compatible liquid
directly into the seal gland. The pressure of the flushing liquid must be
0.35 to 1.01 kg/cm
2
| 5 to 15 psi greater than the seal chamber pres-
sure. The injection rate must be 2 to 8 lpm | 0.5 to 2 gpm.
Other You can use other methods that employ multiple gland or seal cham-
ber connections. Refer to the mechanical seal reference drawing and
piping diagrams.
5.7.3 Packed stuffing box option
WARNING:
Packed stuffing boxes are not allowed in an ATEX-classified environment.
The factory does not install the packing, lantern ring, or split gland.
These parts are included with the pump in the box of fittings. Before you start the pump, you must
install the packing, lantern ring, and split gland according to the Packed stuffing box maintenance
section in the Maintenance chapter.
5.7.4 Connection of sealing liquid for a packed stuffing box
NOTICE:
Make sure to lubricate the packing. Failure to do so may result in shortening the life of the
packing and the pump.
You must use an external sealing liquid under these conditions:
• The pumped fluid includes abrasive particles.
• The stuffing-box pressure is below atmospheric pressure when the pump is running with a suc-
tion lift or when the suction source is in a vacuum. Under these conditions, packing is not
cooled and lubricated and air is drawn into pump.
Conditions for application of an external liquid
Condition Action
The stuffing box pressure is above atmos-
pheric pressure and the pumped fluid is
clean. Normal gland leaks of 40 to 60 drops per minute is usually suffi-
cient to lubricate and cool the packing. You do not need sealing
liquid.
The stuffing box pressure is below atmos-
pheric pressure or the pumped fluid is not
clean. An outside source of clean compatible liquid is required.
An outside source of clean compatible liquid
is required. You must connect the piping to the lantern ring connection with a
40 to 60 drops-per-minute leak rate. The pressure must be 1.01
kg/cm
2
| 15 psi above the stuffing box pressure.
5.7 Shaft-sealing options
56 Model IC, ICI, ICH, ICIH Installation, Operation, and Maintenance Manual