Flowserve MNV - Manual (Page 36)

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04
Page 36 of 47
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d) In cases where more than one part or box is
returned, individually print or stencil your name,
the part name, and the "RM" tag number on each
part or box. Then attach the "RM" tag to one of
the parts or boxes. This will facilitate quick
identification.
Articles being returned should be carefully packed to
prevent damage from handling or from exposure to
the weather.
6.2.4 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.
6.3 Suggested spares and consumable
items
For start up purposes:
1 - complete set of gland packing
1 - shaft sleeves
1 - set of gaskets and seals
(optional: 2 - mechanical seal kits)
For 2 years operation:
1 - set of bearings (line and thrust)
2 - sets of gland packing
2 - shaft sleeves
2 - sets of gaskets and seals
2 - lantern rings
2 - casing wear rings
(optional: 2 - mechanical seals
2 - impeller wear rings)
For 4 years operation:
1 - set of bearings (line and thrust)
2 - sets of gland packing
2 - shaft sleeves
2 - sets of gaskets and seals
2 - lantern rings
2 - casing wear rings
1 - impeller
(optional: 2 - mechanical seals, 2 - impeller wear
rings)
6.4 Tools required
No special tools are needed to maintain this pump.
Most tools are readily available in standard tool kits,
and dependent on pump size :
• Open ended spanners (wrenches)
• Socket spanners (wrenches)
• Allen keys
• Range of screwdrivers
• Soft mallet
For some specialized equipment:
• Bearing induction heater/Oven
• Dial test indicator
• C-spanner (wrench) - for removing shaft nut.
(If difficulties in sourcing are encountered,
consult Flowserve.)
6.5 Fastener torques
The following table is provided as a guide for the
proper assembly of Grade (SAE) 2 fasteners.
Torques are for lubricated threads. Lubricate the
fastener and tapped hole threads and the underside
of the bolt heads and nuts before assembly.
DO NOT lubricate threads that require the
application of Loctite thread locking compound.
Bolt size
mm (in.)
Torque
N-m (lb-ft)
M 6 (1/4) 8 (6)
M 8 (5/16) 16 (12)
M 10 (3/8) 28.5 (21)
M 12 (7/16) 47.5 (35)
M 14 (1/2) 70 (50)
*( 9/16) 95 (70)
M 16 (5/8) 135 (100)
M 20 (3/4) 235 (175)
M 24 (7/8) 205 (150)
M 27 (1) 305 (225)
M 30 (1-1/8) 435 (320)
M 33** (1-1/4) 610 (450)
M 36 (1-3/8) 800 (590)
M 39** (1-1/2) 1070 (790)
* No metric equivalent available
** Nearest size equivalent in metric (non-std)
For assembly of a joint always finger
tighten all nuts or bolts first. Then cross-tighten
evenly in about three equal steps to develop final
torque values.
6.6 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 refurbished. The clearance dimensions
depends on pump size. Contact Flowserve
representative for the service advise.