Grundfos® CR High Pressure Pumps
The last word multistage pump technology
Grundfos was the first pump manufacturer ever to create a multistage in-line pump. Known as the CR pump, this innovative design has inspired followers all over the world. Even so, continuous development and innovation ensure that the
Grundfos CR remains unmatched. The CR of today reflects the needs and requirements of customers worldwide. We know this, because we asked you first.
All development work at Grundfos is carried out with the end-users in mind; never for its own sake.
The INSIDE Story
Grundfos provides many motor solutions depending upon
the application and demand. In addition, Grundfos makes
its own motors to ensure maximum performance. The ML
motors* are remarkably quiet and highly efficient. They
are also available in the self-regulating MLE configuration,
featuring an integrated variable frequency drive.
The specially designed cartridge seal increases reliability,
ensures safe handling and enables easy service and access.
Shaft seal solutions
The cartridge shaft seal configuration comes in a wide
choice of materials. It is available in flushed seal and
double seal configurations and can handle temperatures
from -40°F to +356°F (-40°C to +180°C).
The Grundfos CR can be connected to any piping system.
The patented Grundfos LiqTec™ system eliminates the risk
of breakdowns due to dry running. If there is no liquid in
the pump, the LiqTec will immediately stop it.
Pump efficiency is maximized by state-of-the-art hydraulic
design and carefully crafted production technology.
The CR bearings are remarkably long-lived thanks to hardwearing
materials and a wide range of options for difficult
The CR is available in four different materials: AISI 304/cast
iron, stainless steel AISI 304, stainless steel AISI 316, and
Wide range of sizes
The CR comes in 11 hydraulic sizes and hundreds of pressure
sizes, ensuring that
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 Grundfos CR is different. As
part of our constant dedication 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 more forgiving if the pump does run dry.
Grundfos LiqTec checks 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.
Unique cartridge seal design:
The seal used in the CR line combines the best features of
standard seals, wrapped up in an ingenious cartridge design.
All of these ensure extra reliability.
The durable seal is made from hardwearing materials which
prevent downtime and extend the lifetime of the seal. All
axial movement has been eliminated, preventing wear of
the shaft and rubber parts - a problem for traditional seals.
The cartridge seal is a balanced type seal, which makes it less
sensitive to pressure.
We know, however, that even the best of materials are
subject to wear. That is why the innovative team at Grundfos
set out to eliminate the small, yet crucial, factors that can
have a negative impact on pump reliability. Many of these
have to do with handling, assembly and service.
The cartridge design ensures that the seal components
will never be assembled incorrectly, the spring will
never be incorrectly preloaded, and that sensitive surfaces will
never be subjected to greasy fingers or dirt. These factors are
common causes of short seal life in other pumps. The cartridge design also enables rapid replacement when
the seal ultimately does need changing. All in all, downtime is
minimized, which translates into significant savings for your
Efficiency saves money
year after year
The result of years of Grundfos development work is a 10%
increase in pump efficiency. This translates into a power
reduction of 15-20% for the CR pumps. When pumps are in
operation many hours a day, such improvements provide
substantial savings - year in and year out.