Grundfos CR | Innovation Inside
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Superior dry-running protection
Dry running is the most common cause of pump failure. In
most pumps, the shaft seal and bearings will burn out
almost immediately if liquid stops flowing in the pump.

The Grundfos CR is different. As part of our constant
dedi¬cation to innovation, we have tested new and
alternative materials to bring you the best possible
solution. This means that we can equip CR pumps with a
shaft seal and bearing system that can withstand extreme
heat and friction for longer periods of time. This makes
them less unforgiving if the pump does run dry.

The Grundfos LiqTec: checking for liquid 24 hours a
day
For those who need to avoid dry-running altogether, the
Grundfos LiqTec is the answer. Available with all CR
pumps, the LiqTec is plug-and-play technology at its very
best. Ever vigilant, the LiqTec constantly checks that there
is liquid in the pump. If there isn’t, it stops the pump
immediately. With the Grundfos LiqTec, you always have
someone watching your pump.
In the event of dry running, the
Grundfos LiqTec immediately shuts
down the pump before any damage is
done.
Unique cartridge seal design
The CR deserves an outstanding seal. So do you. The seal
used in the CR line combines the best features of standard
seals, wrapped up in an ingenious cartridge design that
provides unique advantages. All of these ensure extra
reliability.

The durable seal is made from hardwearing materials
which prevent downtime and prolong the lifetime of the
seal. All axial movement has been eliminated, preventing
wear of the shaft and rubber parts – a typical problem area
for traditional seals. The cartridge seal is a balanced type
seal, a fact which makes it less insensitive to pressure.

We know, however, that even the best of materials are not
necessarily enough to guarantee success in real life. That is
why the innovative team at Grundfos set out to eliminate
the small, yet crucial, factors that can have a negative
im¬pact on pump reliability. Many of these have to do with
handling, assembly and service.

Safe and easy handling
The peerless cartridge design ensures that the seal
compo¬nents will never be assembled wrongly, the spring
will never be incorrectly preloaded, and that sensitive
surfaces will never be subjected to greasy fingers or dirt.
All these factors are common causes of short seal lifetimes
in other pumps.

The cartridge design also enables rapid replacement when
the seal ultimately does need changing after a long period
of service. All in all, downtime is minimised. Naturally, this
translates into significant savings for your business.
With unfailing attention to reliability, the
Grundfos engineers have designed an
innovative cartridge seal that can be
replaced within single minutes.

And that is just one of the remarkable
benefits it offers.
The cartridge design allows you to replace the seal in minutes – without special tools and
without dismantling the pump.
Heavy motors can stay in place with the Grundfos spacer coupling

Minimising downtime is also part of reliable op¬eration. That is why Grundfos has
eliminated a major nuisance for owners of large pumps.

Now, it is no longer necessary to remove heavy motors to replace the seal: The
innovative spacer coupling, unique to the CR range, means that all motors
weighing more than 35 kg can be left in place during seal replacement.
When nothing else will do: The titanium CR
After dry running, corrosive liquids are the second-most com¬mon cause of pump failure and shortened
pump lifetimes. High-grade stainless steel makes the Grundfos CR very resist¬ant to corrosion, but for
extremely demanding applications, true reliability requires the titanium touch.

The CR is the only pump of its kind to come in a full-titanium variant. Now a financially viable alternative,
titanium offers a reliability which other materials simply cannot match. Not even a decade of full immersion
in salt water will leave a blemish on the metal surface.
Reliability in production
At Grundfos, we practice tight control over every aspect of
the production process. Absolutely nothing is left to chance.
Our production is certified in accordance with the strictest
international standards (ISO 9001) and subjected to
rigorous process control.

Remarkably, each CR pump is tested before leaving the
factory. Every single one. They are tested for
performance, power consumption, and static pressure. This
careful testing is the only way to be certain that all pumps
meet the stand¬ards you have a right to expect from a
Grundfos CR solution.
All Grundfos products are built to last. Our customers demand long-term solutions, and as a
result Grundfos pumps need to be as cost-efficient as possible in the long run. The best
possible way to ensure this is to reduce electricity consumption, so that is exactly what we did.
Reduce the real costs

Electricity is the most expensive part of any pump.
This simple fact is often overlooked when pumps
and prices are compared, so it is worth repeating
here.

It may still surprise some to learn that the purchase
price and maintenance costs account for less than
15% of the total life¬time cost of a pump.
Obviously, this means that electricity accounts for a
staggering 85% or more of the total costs. So if you
want to save money, that’s what you should look at.

Commitment to cost efficiency
The Grundfos CR makes a real difference. See the
table below to find out just how much electricity you
can save.

These savings will continue for years and years –
for every pump you own. When you add up the
total costs, you will find that the low lifetime cost of
owning a CR pump is unmatched.
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