Flowserve MJ Slurry User Manual

Page 27

MJ SLURRY USER INSTRUCTIONS ENGLISH 71569294 - 02/08

Page 27 of 42

6.4 Recommended spares and consumables

For start up purposes:

1 - complete set of gland packing
2 - shaft sleeves
1 - set of gaskets and seals
(optional: 2 - mechanical seals)

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)

6.5 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 48 screws/nuts

• Socket spanners (wrenches), up to M 48 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

Torque Nm (lb

yft)

Bolt size

Pump feet

fasteners

All other

fasteners

M 16 (⅝ in.)
M 20 (¾ in.)
M 24 (⅞ in.)

M 27 (1 in.)

M 30 (1⅛ in.)
M 36 (1⅜ in.)
M 42 (1⅝ in.)
M 48 (1⅞ in.)

170 (125)
340 (250)
590 (435)
770 (570)

1 100 (810)

1 840 (1 350)
2 000 (1 475)
2 240 (1 650)

84 (62)

165 (120)
285 (210)
375 (275)
540 (400)
900 (660)

1 410 (1 040)
2 060 (1 500)

TIGHTENING TORQUE

FOR STAINLESS STEEL STUDS

WITH LUBRICATED THREADS

THREAD SIZE

TIGHTENING TORQUE

Nm.

Ft. lbs.

M10x1.5 (3/8–16UNC)

M12x1.75 (1/2–13UNC)

M16X2 (5/8-11UNC)

M20x2.5 (¾-10UNC)

100

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 radial clearance detailed
in section 3.4.2 has doubled to 0.6 to 0.8 mm (0.024
to 0.032 in.), depending on pump size. On FRBH it is
recommended that the product lubricated bearing be
renewed at a diametrical clearance of 0.5 mm
(0.04 in.).

6.8 Disassembly

Refer to section 1.6, Safety, before dismantling

the pump.

Before dismantling the pump for

overhaul, ensure genuine Flowserve replacement
parts are available.

To disassemble the pump consult the sectional
drawings, see section 8, Parts list and drawings.

6.8.1 Rotating

Element

The following procedure is recommended for removing
and disassembling the rotating assembly.

Note that the replacement gaskets and similar

consumable materials should be available since they
will be required for reassembly.

a) Isolate motor and lock off electrical supply in

accordance with local regulations.

b) Isolate suction and discharge valves.
c) Remove

guards