Flowserve Type R - Manual (Page 12)

R and RX SLURRY Pump USER INSTRUCTIONS ENGLISH 71569242 03-11 (E)
Page 12 of 54
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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 "R Slurry" pumps are single stage, end
suction centrifugal pumps specifically designed for
handling abrasive slurries typical of mining and mineral
process. The casing is radially split with the gland side
casing pedestal mounted. The discharge is tangential.
The casings are fitted with removable rubber liners.
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 RX and RS
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.
8R-193
Nominal discharge branch size.
Configuration – see below.
Nominal maximum impeller diameter.
Frame size
R
is the basic pump type
X
is added for an expeller
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 and is radially
split. The casing are cast iron and are pedestal
mounted therefore the discharge can be rotated to
meet a number of optional orientations. It is fitted with
replaceable rubber liners. The casing joints are self
sealed by the rubber liners however optional urethane
lined casing may require gaskets at some flange
connections. The casing flanges are also drilled and
tapped
3.3.2 Impeller
The impeller is a 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 RS pump has
larger front clearances to reduce shear and improve
froth handling capabilities.
3.3.3 Shaft
The large diameter stiff shaft, mounted on bearings,
has a keyed drive end. The shaft extension at the
coupling is extended to cover multi-v-belt drives.
3.3.4 Pump bearings and lubrication
Ball bearings are fitted as standard and may be either
oil or grease lubricated.