Grundfos CRN – MAGdrive
Hermetic sealed pump operation
In industries where pumping of dangerous and
aggressive liquids is an integrated part of the daily
operation, safety is top priority. Pumps that leak
are dangerous for their surroundings and neither
suitable nor safe for handling that kind of liquids.

Years of close cooperation with our clients in the
industry, has taught us that the traditional CR
shaft seal solution, is unsuit¬able for the handling
of aggressive liquids.

Therefore, Grundfos has developed the CRN
MAGdrive; a ver¬tical multi-stage centrifugal
pump. With the CRN MAGdrive, Grundfos has
designed a sealless pump for industrial
applica¬tions, which do not leak. Thanks to the
magnetic drive, the pump is hermetically sealed,
and do not present any risk to its surroundings.

Magnetic-drive pump (MAGdrive)
Grundfos CRN MAGdrive pumps operate according
to a patented, magnetic-drive system that
eliminates the need for shaft seals. The power
from the motor is transmitted to the pump by
magnetic force and not by a conventional
coupling. Combined with a hermetically sealed
liquid end, the pump is totally leak-free.

As all axial forces are absorbed in the MAGdrive
system, the pump incorporates a standard ICE or
NEMA motor with keyway and deep-groove ball
bearing.
The CRN MAGdrive pump is suitable for wide selection
of industrial applications such as:
• Aggressive or corrosive liquids
Concentrated sulphuric acid, nitric acid, phosphoric
acid, etc.
• Toxic liquids
Trichloroethylene, chloroform, phenol, etc.
• Flammable liquids
Petrol, jet fuels, LPG, alcohols, etc.
• Hardening/curing liquids
Paint, glue, resins, etc.
• Crystallizing liquids
Glycol additives, naphthalene, sugar products, salts,
etc.
• Refrigerants
Ammonia, synthetic chemicals (CFC, HCFC, HCF), etc.
Features and benefits
CRN MAGdrive offers the following special
features and benefits:
• a hermetically sealed drive system for 100 %
leak free pump operation
• special choice of materials and design for low
energy loss
• simple pump design for ease of service
• unique pump design for efficient cooling of
magnet by means of the pumped liquid
• ATEX version available.
Custom-built solutions
The comprehensive standard Grundfos CR programme
covers a wide range of pumps, for a wide range of
different industrial applications. Besides, Grundfos
designs custom-built pump so¬lutions; acknowledging
that sometimes it does not take more, than a little
extra effort, to come up with the right solution. With a
custom-built pump solution from Grundfos, your pump
is capable of handling even higher pressures, more
aggressive liquids, excessive liquid temperatures etc.
Worldwide pump supplier
experienced teams of service technicians are
experienced teams of service technicians are
always ready to serve you wherever in the world
you are and – of cause – at a short notice –
whenever you need it.whenever you need it.
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