Flowserve WDX - Manual (Page 37)

WDX USER INSTRUCTIONS ENGLISH 71576322 06-05
Page 37 of 46
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6.9.6 Diffusers and interstage casings
There is normally no need to separate the diffusers
and interstage casings, however, if they do become
separated, or new interstage casings or diffusers are
to be installed, care must be taken to insure that the
diffuser is seated (in contact) with the back surface of
the interstage casing, and that the pin fits correctly in
the hole.
6.10 Assembly
To assemble the pump consult the sectional
drawings, see section 8, Parts list and drawings.
Ensure threads, gasket and O-ring mating faces are
clean and that ball bearings are C3 fit. Apply thread
sealant to non-face sealing pipe thread fittings.
Do not force when assembling the various
components.
Coat all fittings with an antifriction product.
To assemble the pump, start from the suction side.
Assembly work should be preferably carried out with
the pump in a vertical position.
To assemble the pump, reverse the dismantling
procedures previously described, see the cross
sectional drawings. Consult the sectional drawing to
organize the required operations. Replace all
components in their original place.
6.10.1 Shaft seal assembly
Packed Stuffing box:
as per section 6.2.5.
Mechanical seal:
Refer to assembly drawings for the seal and pump.
Great care must be taken concerning the cleanliness
during the mounting operation.
Remove the surface protection of the rings just before
installation.
As some O-ring materials do not support grease or
oil, water is preferred for easing assembling, where
compatible with the product to be pumped.
6.10.2 Product lubricated bearings (WDXE/S)
Install the bearing components after the whole pump
has been assembled; see sections 6.8.3.2 and
6.8.3.3 for diagrams.
- Put the sleeve onto the shaft end in taking care that
the shaft pin fits into the slot.
- Put the circlip [6544-01] in the shaft groove.
- Install the bushing [3300] in the suction casing.
6.10.3 Anti friction bearings
Antifriction bearings should be preassembled so that
the complete bearing set can be mounted on the
pump casing. To do this, reverse the dismantling in
sections 6.8.2 and 6.8.3.