DDC Pumps offer 3 displacements in one housing size.

Press Release Summary:

Providing displacements of 25, 30, and 35 cc, Direct Displacement Control Pumps feature internal Neutral Return Mechanism, which is protected and always lubricated. Units are designed for closed-loop machine operations and are suited for wide area mowers, sweepers, mini excavators, walk-behind skid steer loaders, small tractors, and other machines used in areas where high noise levels are an issue.

Original Press Release:

Sauer-Danfoss Sets New Standards For DDC Pumps

AMES, IOWA, USA - SAUER-DANFOSS INC. (NYSE:SHS) Sauer-Danfoss has introduced a new Direct Displacement Control (DDC) pump that will reduce installation time, increase overall machine life, add extra flexibility to the vehicle design process, and help lower noise levels. A key feature is the pump's built-in Neutral Return Mechanism (NRM). All DDC pumps need such a mechanism, but on most competing products it is placed outside the pump - a complex, external unit containing linkages and springs.

The Neutral Return Mechanism on the Sauer-Danfoss pump is placed inside. The pump therefore requires a minimized installation effort relative to a solution with external linkages and springs. It also saves space, thereby leaving room for other components on the application. Another important benefit is longer machine life. Because the return mechanism is located inside the pump - protected and always lubricated - end users will experience more consistent machine operation and longer service intervals.

Branko Horvat, Product Portfolio Manager for Sauer-Danfoss USA explains: "All DDC pumps need a Neutral Return Mechanism to bring the swash plate back to neutral. Historically, though, the pumps have featured external mechanisms subject to contaminants that include everything from dust and dirt to sticks and stones. In such designs, external wear points, friction, and machine vibration also add to maintenance needs and, over time, NRM performance may degrade. Placing the Neutral Return Mechanism inside the product, we have eliminated this problem. Our testing shows that the pump's return performance continues to stay within extremely tight tolerances. The result is longer service intervals and longer machine life benefiting vehicle manufacturers and end-users alike."

Sauer-Danfoss' DDC pump also offers the very thing that vehicle designers appear to want more than anything else: flexibility. The explanation lies in the pump housing. The new pump is the industry's only DDC solution offering three displacements in one housing - 25 CC, 30 CC, and 35 CC. For design engineers working on more than one model at the same time, three displacements in one housing size is a feature that adds a new level of flexibility. The pump installation process is the same for different vehicle models, thereby allowing engineers to spend more time on other design issues.

The pump is designed for closed-loop machine operations and ideal applications include wide area mowers, green mowers, sweepers, mini excavators, walk-behind skid steer loaders, and small tractors - machines that may all be used in areas where high noise levels can be an issue. Sauer-Danfoss engineers took this into account at a very early stage of the design process.

"Lower noise is an important issue for applications that operate in areas where people live and work," says Horvat. "Reducing and improving the sound quality was one of the project objectives during the development phase. We believe the result speaks for itself. Both the sound level and the sound quality have been improved. In fact, the DDC pump is up to 4 dB quieter than similar products available on the market and the nature of the sound or the sound quality is better, too."

Sauer-Danfoss Inc. is a worldwide leader in the design, manufacture and sale of engineered hydraulic, electric, and electronic systems and components, for use primarily in applications of mobile equipment. Sauer-Danfoss, with approximately 9,000 employees worldwide and revenue of more than $1.7 billion, has sales, manufacturing and engineering capabilities in Europe, the Americas and the Asia-Pacific region. The company's executive offices are located near Chicago in Lincolnshire, Illinois and in Neumunster, Germany. More details online at www.sauer-danfoss.com.

For Technical Issues:
Branko Horvat
Sauer-Danfoss Phone: +1 515-239-6438
Ames, Iowa bhorvat@sauer-danfoss.com

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