Flowserve WDX - Manual (Page 32)

WDX USER INSTRUCTIONS ENGLISH 71576322 06-05
Page 32 of 46
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6.3.2 Storage of spares
Spares should be stored in a clean dry area away
from vibration. Inspection and re-treatment of metallic
surfaces (if necessary ) with preservative is
recommended at 6 monthly intervals.
6.4 Recommended spares and
consumable items
For start up purposes:
1 - complete set of gland packing
1 - complete set of mechanical seals
1 - set of gaskets and seals
1 - set of bearings
For 2 years operation:
1 - set of bearings (line and thrust)
1 - set of gaskets and seals
1 - set of bearing sleeves
1 - complete set of gland packing
1 - complete set of piston drum and sleeve
(optional: 2 - mechanical seals with sleeves
1 set of impeller wear rings)
For 4 years operation:
1 - set of bearings (line and thrust)
1 - set of gaskets and seals
1 - set of bearing sleeves
1 - complete set of gland packing
1 - complete set of mechanical seals and sleeves
1 - complete set of piston drum and sleeve
1 - complete set of wear rings (casing and
impeller)
1 - complete set of impellers
1 - shaft
6.5 Tools required
A typical range of tools that will be required to
maintain these pumps is listed below.
Readily available in standard tool kits, and dependent
on pump size:
 Open ended spanners (wrenches) to suit up to
M 33 screws/nuts
 Socket spanners (wrenches), up to M 33 screws
 Allen keys, up to 10 mm (A/F)
 Range of screwdrivers
 Soft mallet
More specialized equipment:
 Bearing pullers
 Bearing induction heater
 Dial test indicator
 C-spanner (wrench) - for removing shaft nut.
(If difficulties in sourcing are encountered, consult
Flowserve.)
6.6 Fastener torques
6.6.1 Tie rods
Pump siz e Torque Nm (lb ft)
1.5 WDX
2 WDX
3 WDX
4 WDX
305 (225)
430 (320)
650 (480)
905 (670)
6.6.2 Other fasteners
Torque Nm (lb ft)
Bolt size
Steel fastener
Stainless steel
fastener
M6
M8
M10
M12
N/A
17 (12.5)
33 (24.3)
58 (42.8)
2.5 (1.84)
6 (4.43)
13 (9. 59)
22 (16.2)
6.7 Renewal clearances
As wear takes place between the impeller and casing
ring the overall efficiency of the pump set will decrease.
To maintain optimum efficiency it is recommended that
rings are replaced and the impeller renovated when the
diametral clearance detailed in section 3.5.2 has
doubled.
For WDXE and WDXS it is recommended to renovate
or change line bearings when clearances have
doubled from those indicated in section 3.5.3.
6.8 Disassembly
Refer to section 1.6, Safety, and section 6.1
Maintenance, before dismantling the pump.
Before dismantling the pump for
overhaul, ensure genuine Flowserve replacement
parts are available.
Refer to sectional drawings for part numbers and
identification.
When dismantling, for convenience at reassembly,
lay out all parts in the order in which they are
removed. Protect all machined faces against metal-
to-metal contact and corrosion.
Disassembly is preferably carried out with the pump
in a vertical position.
6.8.1 Initial procedure
1. If bearings are oil lubricated, drain housings and
remove oilers.