The Inside Story Grundfos motor Grundfos makes its own motors to ensure maximum performance. The MG motors are remarkably silent and highly efficient. They are also available in the self-regulating MGE configuration, featuring an integrated frequency converter. 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, double seal and magnetic drive configurations. Handles temperatures from...

The complete Grundfos CR range: The last word in 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. Superior reliability 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 latest improvements...

reliability It’s reliable. And we can prove it. The boiler feeding process reads like a shortlist of extreme pump conditions: high temperatures, long operating hours, frequent starts/stops, pressure pulsing, and poor inlet conditions. This makes it even more remarkable that the Grundfos CR is the first choice for such operations worldwide.

Reliability in real life The CR is renowned 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. We have added unique features to ensure unsurpassed reliability: dry-running protection, a unique cartridge seal, and a fulltitanium variant. Extreme conditions call for extreme reliability. Less demanding applications need fewer special features. The virtually endless range of standard and customised CR pumps means that you can always find the right pump, no matter what your requirements may be. Superior...

reliability 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...

All Grundfos pumps are thoroughly tested before they leave the factory. Heavy motors can stay in place with the Grundfos spacer coupling Minimising downtime is also part of 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: 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 common...

efficiency Let’s talk money! All Grundfos products are built to last. Our customers demand long-term solutions, so Grundfos pumps bring you the lowest total life-cycle costs. For example, we have reduced the CR’s electricity consumption so much that all 3-phase motors are marked EFF1 for their efficiency..

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 lifetime 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. Efficiency Class 1 motors – the best efficiency you can get The Grundfos CR makes a real difference. All 3-phase 50Hz...

efficiency Improve efficiency with the right pump Getting the best possible overall efficiency out of your pump makes financial sense. The narrow interval between CR pump sizes allows you to eliminate the efficiency drop associated with over-dimensioned pumps. % 70 60 50 40 By minimising the difference between pump capacity and the required pressure and volume, you get a pump which runs as close to its optimum duty point as possible. That makes it as cost-efficient as possible. And the CR family is sure to have exactly the right match for you. 30 20 10 0 1 2 3 m3/h Zero impeller seal clearance...

2 An enhanced impeller design ensures a more streamlined flow in the impeller, reducing eddy flow and friction losses. Tiny margins determine the success of the final result, so Grundfos aimed for the very best. We developed a highly specialised laser-welding technology which facilitates unmatched accuracy. This technology literally makes dreams come true, allowing for a seamless transition from the sketchpad to real life. We use it to bring you impellers of truly superior design and construction, aiming for the point of theoretical perfection. Does a smaller motor sound good to you? The 10%...

solutions What you need. Guaranteed. Tough pumps for difficult liquids: the Grundfos CR pump series is so wide ranging and offers so many opportunities for customised solutions that even the most extreme of requirements can be met.

All your needs covered The CR range meets all challenges Infinite variety The CR range is without parallel on the world market. Available in 11 pump sizes, four basic materials and a number of configurations near the one million mark, the CR programme is the most extensive and comprehensive around. You can get CR pumps with magnetic drives, with air-cooled shaft seal chambers, with double shaft seals, etc. Special CR pumps are available for high-pressure performance, for aggressive liquids, and much more. And there is a CR pump for almost any liquid you could possibly want to pump. Aggressive...