Goulds Pumps JC - IOM - Manual (Page 20)

5. Expand first coil as shown and insert into stuffing box.
Tamp packing to stuffing box shoulder firmly with the
gland. Note where the cut is positioned.
6. Install second and third coils as required by assembly
drawing, staggering the cut 90º-120º.
7. Insert seal cage (lantern ring) into stuffing box,
carefully noting its proper position on assembly
drawing. Failure to properly locate seal cage will result
in insufficient packing lubrication. Packing and shaft
sleeve damage will occur.
8. After packing and seal cage are properly installed,
insert gland into stuffing box. Tighten gland nuts
finger-tight only. Shaft should turn freely.
NOTE: Do not over tighten gland nuts. Packing may
set permanently and require removal. Over tightened
packing causes excessive friction between packing and
sleeve, and will result in damaged components. A
noticeable temperature increase in stuffing box would
indicate insufficient lubrication.
9. Follow pump start-up procedure. Turn on stuffing box
lubricating liquid and start pump.
10. A significant amount of lubricating liquid should leak
from gland side of stuffing box. Operate pump for at
least 15 minutes before tightening gland nuts. Make
small, even gland nut adjustments to reduce leakage.
Allow adequate run-in time between adjustments.
Acceptable leakage is 30-50 drops per minute.
11. Periodic maintenance is absolutely required for all
packed pumps.
Normal shaft run-out should be under .005" to avoid
pounding of stuffing box packing. With excessive shaft
run-out, shaft straightening or replacement is necessary.
MECHANICAL SEALS
!
The mechanical seal used in an ATEX classified
environment must be properly certified.
!
The mechanical seal must have an appropriate seal
flush system. Failure to do so will result in excess
heat generation and seal failure.
Most mechanical seals are installed and adjusted at the
factory. Due to size and design, some installed mechanical
seals are supplied with shipping retainers. Shipping
retainers hold the sealing faces apart to avoid damage
during transport. Shipping retainers must be removed
before shaft is to be rotated. Pumps with retained seal faces
will be specially marked and instructions from the seal
manufacturer for retainer removal will be provided.
Mechanical seals have a stationary and a rotating sealing
face. Commonly, these sealing rings are of carbon and
ceramic material, brittle in nature, and easily damaged. As
the sealing rings seat with the operation of the pump, a
compatible wear pattern develops between the mating
surfaces. To disassemble the mechanical seal after the wear
pattern is established would necessitate the replacement of
the rotating and stationary sealing elements. Do not replace
only one component.
To insure the life and sealing characteristics of the
mechanical seal, lubricating liquid must be circulated
through the stuffing box. Clear, grit free liquid is
necessary.
Special seal information and replacement seal elements
should be provided by the seal manufacturer. Goulds
strongly recommends the stocking of replacement sealing
elements.
$
CAUTION
Do not make shaft adjustments on mechanical seal
installations without consulting seal instructions and
pump assembly drawing.
PUMP START-UP
!
Service temperature in an ATEX classified
environment is limited to the area classification
specified on the ATEX tag affixed to the pump
(reference Table 1 in the ATEX identification
section).
!
The coupling used in an ATEX classified
environment must be properly certified.
!
The coupling guard used in an ATEX classified
environment must be constructed from a non-
sparking material.
START-UP PRECAUTIONS
1. All equipment and personal safety related devices and
controls must be installed and operating properly.
2. To prevent premature pump failure at initial start up
due to dirt or debris in the pipe system, ensure the
system has been adequately cleaned and flushed.
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JC IOM 5/08