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

Motor
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.
Cartridge seal
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).
Connection options
The Grundfos CR can be connected to any piping system.
Dry-running sensor
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.
High-performance hydraulics
Pump efficiency is maximized by state-of-the-art hydraulic design and carefully crafted production technology.
Durable bearings
The CR bearings are remarkably long-lived thanks to hardwearing materials and a wide range of options for difficult liquids.
Material options
The CR is available in four different materials: AISI 304/cast iron, stainless steel AISI 304, stainless steel AISI 316, and titanium.
Wide range of sizes
The CR comes in 11 hydraulic sizes and hundreds of pressure sizes, ensuring that you can always find exactly the right pump for the job.

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 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 business.

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.