Flowserve M Slurry - Manual (Page 12)

M SLURRY USER INSTRUCTION ENGLISH 71569241 - 02/08
Page 12 of 60
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2.5 Recycling and end of product life
At the end of the service life of the product or its parts,
the relevant materials and parts should be recycled or
disposed of using an environmentally acceptable
method and in accordance with local regulations. If the
product contains substances that are harmful to the
environment, these should be removed and disposed of
in accordance with current local regulations. This also
includes the liquids and/or gases that may be used in
the "seal system" or other utilities.
Make sure that hazardous substances are
disposed of safely and that the correct personal
protective equipment is used. The safety specifications
must be in accordance with the current local
regulations at all times.
3 PUMP DESCRIPTION
3.1 Configurations
Flowserve "M Slurry" pumps are single stage, end
suction centrifugal pumps specifically designed for
handling abrasive slurries typical of mining and mineral
process. A semi-concentric volute type casing is
pedestal mounted with tangential discharge nozzle.
The closed impeller with rear pump-out vanes is
capable of passing solids of various sizes. Sealing is
provided at the impeller to shaft fit to prevent corrosion
and thereby facilitate impeller removal. The rigid three
point thrust bearing housing support permits precision
bearing alignment. Since the casing is pedestal
mounted, back pull-out is not a normal feature.
The pump is sealed using non-asbestos packing in the
stuffing box. An optional hydrodynamic seal,
commonly referred to as an expeller is available and
various mechanical seal designs as specified by the
customer may be installed at the factory or retrofitted in
the field.
All pumps are carefully inspected and prepared for
shipment. All exterior machined surfaces are coated
with a rust preventative compound and openings are
provided with covers or plugs. Shaft packing, when
required, is shipped with the pump and should not be
installed until the pump is ready to run. Mechanical
seals, when provided, are factory installed and adjusted
prior to shipment. The axial impeller running clearance
is preset at the factory but should be checked prior to
final alignment in case of tampering.
These User Instructions also cover the MX and MS
configurations, check the nameplate against the
nomenclature.
3.2 Name nomenclature
The pump size will be engraved on the nameplate. The
following example explains how the pump name
identifies the construction features and options.
8M-193
Nominal discharge branch size.
Configuration – see below.
Nominal maximum impeller diameter.
Frame size
S
is added for a recessed impeller
X
is added for an expeller
C
is added for dry-pit vertical close coupled
V
is added for dry-pit vertical with long coupled drive
shaft
J
is added for vertical bottom-bearing configuration
JC
is added for vertical cantilever
3.3 Design of major parts
3.3.1 Pump casing
The pump casing is a semi-concentric volute type
casing and tangential discharge nozzle. The casing is
pedestal mounted therefore the discharge can be
rotated to meet a number of optional orientations. On
standard duty casing the suction nozzle is integral to
the casing. On severe duty pumps the pump uses a
removeable suction cover. The casing joints are
gasketed connections.
3.3.2 Impeller
The impeller is closed design as standard but may be
changed to open designs for mud, froth and viscous
applications. The impeller is thread mounted to the
shaft. All impellers are supplied with pump out vanes to
minimise wear and reduce pressure at the stuffing box.
The vanes are curved to optimize efficiency however,
the “S” configuration utilizes straight radial vanes to
reduce blockage. The impeller of the MS pump has
larger front clearances to reduce shear and improve
froth handling capabilities.