Goulds Pumps ANSI FAMILY IOM (ATEX Compliant) - Manual (Page 53)

Static Seal - A static seal is used to prevent leakage
when the pump is shut down. This is either a lip seal,
elastomeric face seal, or graphite packing. The lip and
elastomeric face seal require no maintenance other
than replacement when leakage becomes excessive.
The packing should be installed as stuffing box
packing. It is a special type designed to run dry, so it
does not require an external flush.
NOTE: HT 3196, NM 3196, 3796, and 3198 are not
available with dynamic seal option.
IMPELLER CLEARANCE SETTING
!
The impeller clearance setting procedure
must be followed. Improperly setting the
clearance or not following any of the proper
procedures can result in sparks, unexpected
heat generation and equipment damage.
s
! WARNING
Lock out driver power to prevent accidental
startup and physical injury.
A change in pump performance may be noted over
time by a drop in head or flow or an increase in power
required. Performance can usually be renewed by
adjusting the impeller clearance. Two techniques are
given to set the impeller clearance, the dial indicator
method and the feeler gauge method.
DIAL INDICATOR METHOD (all but CV)
1. Remove coupling guard. Refer to coupling guard
instructions
Appendix II.
2. Remove coupling.
3. Set indicator so that button contacts either the
shaft end or against face of coupling (Fig. 38).
4. Loosen jam nuts (423) on jack bolts (370D) and
back bolts out about two turns.
5. Tighten each locking bolt (370C) evenly, drawing
the bearing housing (134A) towards the bearing
frame (228) until impeller contacts the casing.
Turn the shaft to ensure contact is made.
6. Set indicator to zero and back locking bolt (370C)
out about one turn.
7. Thread jack bolts (370D) in until they evenly
contact the bearing frame. Tighten the jack bolts
evenly (about one flat at a time) backing the
bearing housing (134A) away from the bearing
frame until the indicator shows the proper
clearance per
Table 3.
8. Evenly tighten locking bolts (370C), then jack bolts
(370D) keeping indicator reading at proper setting.
9. Check shaft for free turning.
10. Replace coupling guard.
ANSIFAM IOM - 5/08
51
5
Dial Indicator Method
Fig. 38
Dynamic Seal with Chekseal™ Fig. 37