Goulds Pumps ANSI FAMILY IOM (ATEX Compliant) - IOM - Manual (Page 133)

APPENDIX IV
Old JM Clipper CFT Design Labyrinth Seal Installation Instructions
Description of Operation
The labyrinth oil seal serves two functions. The first
being to exclude environmental contamination from
the power-end. This is accomplished with a series of
tight clearance fits between the stationary and rotor.
Any water that manages to enter the seal is
eliminated from the seal through a drain slot located
at the six o’clock position when installed.
On the oil side, a series of oil grooves are present to direct
any oil between the shaft and stationary back into the oil
sump through a drain slot at the six o’clock position.
Viton ® O-rings are supplied as standard due to their
chemical resistance. The stationary uses an O-ring to fit
the labyrinth seal to the housing. The stator uses an
O-ring to fit the labyrinth to the housing. The rotor uses an
O-ring to seal along the shaft and to serve as the drive.
Installation Procedures
l
! CAUTION
The ITT Goulds labyrinth oil seal is a one piece
assembly. Do not attempt to separate the rotor
and stator. Damage to the seal may result.
1. Assemble the power end per the instructions in
Section 6 - Disassembly & Reassembly.
l
! CAUTION
The edges of the keyway can be sharp. Failure
to cover the keyway may result in a cut O-ring
and a damaged seal.
2. Wrap tape around the coupling end of the shaft to
cover the keyway.
NOTE: The smooth surface of electrical tape
provides an excellent surface to slide the rotor
O-ring over.
3. Press the seal over the shaft into the thrust
bearing housing or thrust bearing end cover by
hand until the shoulder of the seal is seated
against the housing/cover.
NOTE: An O-ring lubricant is not required, but
can be used if desired. If used, be sure the
lubricant is compatible with the O-ring material
and plant standards.
4. For STX units: Press the seal over the shaft into
the bearing frame by hand until the shoulder of
the seal is seated against the frame.
For all other units: Once the frame adapter is
installed on the bearing frame, press the seal over
the shaft into the frame adapter by hand until the
shoulder of the seal is seated against the adapter.
NOTE: An O-ring lubricant is not required, but
can be used if desired. If used, be sure the
lubricant is compatible with the O-ring material
and plant standards.
NOTE: During start-up when the parts of the
labyrinth oil seal establish a voluntary running
clearance, a small amount of wear is experienced
as the parts are in contact. This wear produces a
carbon filled Teflon
® residue, visible at the outside
diameter of the seal and at the drain slot. This is
the result of the two surfaces being smoothed,
similar to burnishing. A lubricant should not be
applied between the faces at installation. Once the
running clearance has been established, no further
wear is experienced and no decrease in seal
performance occurs as a result of the carbon/
Teflon
® residue.
ANSIFAM IOM - 5/08
131
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