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by Bryan Orchard
W
ith its latest series of canned motor pumps, KSB
has completed the update of its chemical pump se-
ries. The MegaCPK pump was introduced in 2012
and the Magnochem was successfully launched in 2014.
In May this year, KSB introduced its Ecochem Non-Seal.
KSB has been cooperating very closely with the Japanese
company Nikkiso on canned motor pumps since 2008. “We
have combined the powerful motors with the hydraulic sys-
tem of the MegaCPK,” explains Dr Nobert Kastrup, Head of
Product Development at KSB. “The user benefits from our
cooperation in many ways, from the operating reliability, for
example, as well as from the selection chart having closely
spaced sizes and from the high efficiency.”
The Ecochem Non-Seal canned motor pump is used for
handling aggressive, flammable, explosive, toxic, volatile or
valuable liquids in the chemical and petrochemical industries,
in environmental engineering and industrial applications with
temperatures of up to 400 °C. In brief, whenever operating
reliability is paramount.
To cover as many applications as possible the new type
series comes in four variants: The standard variant, called
HN, covers the majority of applications. The term ‘standard’
can be misleading in this context. “We are talking about
hazardous, combustible fluids, such as hydrofluoric acid
or carcinogenic substances as well as other products for
which conventional standardised chemical pumps must be
designed with a double seal,” says Dr Kastrup.
The HN variant, which is suitable for temperatures of up
to 180 ºC, has been developed with the total cost of owner-
ship (TCO) value in mind. The high added value for the user
is primarily achieved by a high overall efficiency of both the
hydraulic systemand themotor. The EcochemNon-Seal pump
has benefited from the MegaCPK’s hydraulic system and ef-
ficiency being optimised. The efficiency has been raised by
19 % compared with the previous models.
Many users can now choose a smaller pump size and
lower their investment costs. Similar achievements can be
expected from the new Ecochem Non-Seal series as the hy-
draulic system of the MegaCPK was essentially transferred
to the EcochemNon-Seal. A small, but interesting side effect
is that in the three years since the launch of MegaCPK, the
pump has recorded the lowest warranty costs ever in the
company’s history. In other words, it is an extraordinarily
dependable pump users can rely on.
When the going gets tough
What really sparks pump developer Kastrup’s interest are
applications outside the standard range. The high-temper-
ature variant HT, for example, covers applications of up to
400 ºC. Such extreme conditions require a special design
which separates the motor space from the hydraulic section.
An auxiliary impeller has been added to cool the fluid in the
rotor space via a heat exchanger.
In normal conditions, the fluid is transported to the mo-
tor space when the highest pressure in the pump section is
reached, and a partial flow lubricates the pump-end bearing.
International
collaboration results in
new non-seal canned
motor pump
What do you get when you combine a
powerful motor with a high-efficiency
hydraulic system? The new Ecochem
Non-Seal series of canned motor
pumps is making a major impact in the
pump industry, not only because of its
reliability, but also because the pump
comes in several flexible design variants.
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Chemical Technology • January 2016