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WATER IN MINING | COVER STORY
HPM SERIES ADVANTAGES
AT A GLANCE
• Zero Axial Thrust – the double suction
high pressure pump in back-to-back
design compensates axial thrust
without using a balance piston.
Standard mine dewatering centrifugal
pumps use balance pistons which are
notorious for maintenance issues as
grit, sand and dirt get between the
surfaces and cause higher maintenance
costs; • Excellent effi ciency of more than 83%;
• Easy to maintain (no special tools
required); req
• Various bearing options;
Va • Primed for all common monitoring
Pri systems;
sys • Shaft seal by adjustable gland packing
Sh (easy
(ea maintenance) – other seal
options are available if required; and
op Installing the HDM
dewatering pumps at t t the
at ter
Central Basin AMD water
treatment plant
• All important components are
protected by wear parts.
pro development
starting point,
as it has already
distinguished itself
thanks to its high
service lifetimes and d
general durability in the past decades. This
is due to the design that is entirely free of
any axial thrust effects, thereby reducing
wear and stress on components to a
minimum; which is, in turn, reflected by
the significantly increased service lifetimes
and lower operating costs, for example,
with regard to the required maintenance
intervals. With conventional HDM (heavy duty
mining) technology for submersible
motor pumps, the pump unit is directly
suspended into the body of water that
needs to be pumped out. However,
the objective of this particular pump
construction was to develop a solution that
could be dry-mounted while still offering
the same pump characteristics, such as the
PERFORMANCE RANGE
(capacities Qopt)
• 500/ 700/ 900 m³/h
• Head of up to 1 300 m
• Pressure of up to 160 bar
• Temperature between +20°C and +80°C
• Speed up to 1 800 rpm
• Power up to 5 000 kW
38 MINING REVIEW AFRICA
| JUNE 2015
l ong
long service life and lack
of axial thrust effects.
This new development will
be used in all those mining areas
where the proven HDM technology
is considered unusable. The engineers
therefore faced the challenge of adapting
this proven “wet technology” to a dry
working environment.
Following the development of a new
high-pressure pump developed for the
water market in parallel with this new
technological “quantum leap”, it was
possible to equip the dry pump with a
hydraulic system of the latest generation.
This allows for effi ciency rates of up to 85%
in accordance with the latest state-of-the-
art technology.
RITZ also offers its customers additional
benefits and advantages including special
pump features which provide the operators
with significant operating benefits and,
thereby, also a decrease in costs.
For example: up until now, dewatering
pumps had to be extensively dismantled
in order to conduct any maintenance on
the bearings – and then, of course, be
reassembled again afterwards.
A modular replaceable bearing now
substitutes the conventionally used slide
bearings. This bearing offers the advantage
of being replaceable without having to
dismantle the entire unit. This saves a
considerable amount of time and thereby
costs for mine operators as well.
Further to this, RITZ engineers have
also developed a new method for the
simple horizontal installation and removal
sim of p pumps due to the prevailing low shaft
heights, which can be used without any
heig special tools or auxiliary means.
spec Ma
Made by experts, for experts
The new HPM mining pumps “precisely”
satisfy the requirements expressed by
the mine operators with regard to their
effi ciencies, performance ranges, the part
standardisation strategy as well as ease
of maintenance thanks to their simplified
assembly and disassembly.
Every unit is also inspected and checked
at the in-house test bed, not only for its
general condition, but particularly for
the bearings and seals as well as for their
effi ciency, performance and service life;
regardless of its size and the planned area of
application. This way, every mine operator
receives a unit that is tailored precisely to his
needs and requirements. MRA
RITZ Pumps South Africa (Pty) Ltd
5a Patrick Road, Jet Park, Hughes,
Boksburg, 1459
P.O. Box 13754, Witfield, 1467,
South Africa
chris@ritzpumps.co.za www.ritzpumps.co.za