The Grundfos CR is well known for its reliability, and rightly so.  The CR design has all the durability that customers expect from a high-quality multistage pump - and then some.  Grundfos has added unique features to ensure unsurpassed reliability:  dry-running protection, a unique cartridge seal, and a full titanium variant. 

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 their constant dedication to innovation, Grundfos has tested new and alternative materials to bring you the best possible solution.  This means that Grundfos CR pumps can come equipped 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 Grundfos 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.
 

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 business.

Spacer coupler minimizes downtime too
Minimizing downtime is part of a reliable operation.  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.  With the innovative spacer coupling, all motors weighing more than 75 pounds can be left in place during seal replacement.