PI 093-14 Elchingen, 2014-11-18

Power density times two: shortest double pump on the market

With a an installation length of only 440 mm, the new size 130 Rexroth A28VO double pump sets a record for compactness.

The new size of the A28VO axial piston variable double pump from Rexroth sets new standards in compactness and efficiency.

  • The A28VO from Rexroth reduces diesel consumption of excavators and other machines with increased total efficiency
  • The new size 130 is up to 20 percent shorter than conventional hydraulic pumps

With the shortest double pump available on the market for implement hydraulics, Rexroth leaves more space for the diesel engine and the exhaust gas after-treatment components in excavators. The Rexroth A28VO size 130 is up to 20 percent shorter than similar pumps available in the market. Thanks to the increase in total efficiency of three to five percent and to the 20 bar increase in permissible nominal pressure and maximum pressure, it generates the same work performance while requiring less energy. That reduces the diesel consumption of excavators and contributes to lower operating costs.

With an installation length of only 440 mm for the size 130 (twice 130 cm³), the double pump sets a new record for compactness. In addition, Rexroth has developed new, highly efficient rotary groups and realized a through-drive compatible pilot pressure pump. But, the A28VO opens up further potential for saving fitment space and costs: Manufacturers of construction equipment can install additional pumps, for example for a fan drive, directly on the pump without the need for a splitter gearbox, which would otherwise be necessary.

The new construction is based on the tried and tested swashplate design and is characterized by a three to five percent higher total efficiency, in comparison with conventional pumps. Furthermore, Rexroth has increased the nominal pressure to 380 bar and the maximum pressure to 420 bar. Thanks to this 20 bar increase in pressure level, the A28VO transmits the same hydraulic performance with a lower volume flow, and flow rate losses are reduced at the same time. In doing this, the pump achieves the same work performance with a lower diesel engine power output. That reduces the diesel consumption and therefore the operating costs of excavators, mobile cranes and drilling equipment. Since the broad portfolio of controllers (power, pressure, proportional), as well as sensors, through drives and mounting flanges, ensures a wide field of application of the double pumps, which are also available in the size 280 (twice 280 cm³).

Economical, precise, safe, and energy efficient: drive and control technology from Bosch Rexroth moves machines and systems of any size. The company bundles global application experience in the market segments of Mobile Applications, Machinery Applications and Engineering, Factory Automation, and Renewable Energies to develop innovative components as well as tailored system solutions and services. Bosch Rexroth offers its customers hydraulics, electric drives and controls, gear technology, and linear motion and assembly technology all from one source. With locations in over 80 countries, roughly 36,700 associates generated sales revenue of approximately 5.7 billion euros in 2013.

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The Bosch Group is a leading global supplier of technology and services. In 2013, its roughly 281,000 associates generated sales of 46.1 billion euros. (NB: Due to a change in accounting policies, the 2013 figures can only be compared to a limited extent with the 2012 figures). Its operations are divided into four business sectors: Automotive Technology, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 360 subsidiaries and regional companies in some 50 countries. If its sales and service partners are included, then Bosch is represented in roughly 150 countries. This worldwide development, manufacturing, and sales network is the foundation for further growth. In 2013, the Bosch Group invested some 4.5 billion euros in research and development and applied for some 5,000 patents. This is an average of 20 patents per day. The Bosch Group’s products and services are designed to fascinate, and to improve the quality of life by providing solutions which are both innovative and beneficial. In this way, the company offers technology worldwide that is “Invented for life.”

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