UNIREX Pump - Manual (Page 55)

MARK 3 USER INSTRUCTIONS ENGLISH 71569102 08-06
Page 55 of 68 flowserve.com
i) Reinstall the repeller cover, repeller, rear cover,
and impeller as instructed in section 6.9.3.
j) The Checkmatic gland must now be moved forward
toward the impeller, pushing the forward lip ahead
of it. It is important that the forward lip be firmly
loaded against the seat when the gland is seated.
Care must be taken to maintain even pressure on
both sides of the gland, keeping the lip seal/ceramic
seal faces perpendicular to the shaft.
k) Tighten the gland nuts evenly.
l) Finally, the rear lip must be slipped forward and
tight against the seat. Care should be taken so
as not to damage the seal face.
6.9.2.5 Reassembly - Sealmatic with dry running
seal
Component seals will generally require that the wet end
is assembled as described in 6.9.3 so that the impeller
may be set prior to seal installation. Review the seal
assembly instructions and drawings provided by the
seal manufacturer. Section 6.9.2.2 contains the general
assembly sequences for component seals.
6.9.2.6 Reassembly - Sealmatic with FXP seal
a) Remove any sharpness of edge at wet end of
shaft with #400 emery cloth.
b) Clean all exposed surfaces of the wet end of the
shaft.
c) Install a shaft guide tool from the Flowserve tool
kit. (See figure 6-1.)
d) Insert the O-rings into the grooves on the inside
diameter of the seal rotor.
e) Slide the drive collar onto the shaft until it
contacts the bearing housing (pins facing away
from bearing housing).
f) Lubricate the O-rings and shaft with non-abrasive
liquid hand soap and slide the seal rotor onto the
shaft until it contacts the rotor drive collar. The
notches on the back side of the rotor should face
toward the bearing housing.
g) Place repeller cover face down on workbench
and set the Teflon disk against the gland surface
(i.e. end of stuffing box). Attach gland to repeller
cover and screw on gland nuts finger-tight.
h) Reinstall the repeller cover, repeller, rear cover,
and impeller as instructed in section 6.9.3.
i) Tighten gland nuts fully. Slide the seal rotor
forward until it contacts the Teflon disk. Slide the
drive collar forward until its pins are fully engaged
in the slots on the back side of the seal rotor.
j) Preload the seal by applying even pressure on
the back of the drive collar in order to push it and
the seal rotor into the Teflon disk. The rotor and
drive collar should be moved approximately 3mm
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collar setscrews while maintaining pressure on
the back of the drive collar.
k) Once the pump is flooded, check the seal to ensure
it is not leaking. If the seal leaks, repeat step j)
above, applying only enough pressure to the drive
collar to stop the leak. Do not over tighten the seal.
6.9.3 Sealmatic pump: installation of repeller
cover, repeller, cover, and impeller
Group 2 pumps - see figure in section 8-3.
Group 3 pumps - see figure 6-29.
a) For Group 2 pumps, install the repeller cover to
the adapter using capscrews [6570.2].
For Group 3 pumps install the repeller cover
[1220.1] over the shaft and push it all the way
back until it touches the bearing housing.
b) Install a new repeller O-ring [4610.11] into the
repeller groove. Lubricate the O-ring with liquid
soap.
c) Install the slip-on repeller [2200.1] onto the shaft.
d) Install the repeller cover/cover gasket [4590.9].
e) For Group 2 pumps, install the cover [1220] to
the repeller cover using capscrews [6570.13].
For Group 3 pumps, install the cover [1220] to
the adapter. Attach to the adapter using
capscrews [6570.2]. Attach the repeller cover to
the cover using the capscrews [6570.13].
f) The repeller and impeller may now be set following
the instructions given in section 6.6.3.
4610.11
4590.9
6570.13
Figure 6-29 - Group 3 Sealmatic
Item Part name
4610.11 Repeller O-ring
4590.9 Gasket – repeller cover
6570.13 Capscrew