PI 046-17 Lohr am Main, 2017-09-06

The right valve platform for every tractor size

Rexroth hydraulic valve platforms SBx4, SM12-EHR12 and ROS12 (OC) for a varied range of power segments

Hydraulic valve platforms from Bosch Rexroth, scalable in both function and power for all performance levels

With three hydraulic valve platforms, Bosch Rexroth covers the current and future requirements for mobile hydraulics in tractors across the whole performance range from 40 kW up to 400 kW. The new Rexroth SBx4 platform meets the requirements of the premium class. Rexroth SM12-EHR12 supports the mid- and low-range power segments and the valve platform ROS12 (OC) was specially developed by Bosch Rexroth for the Asian market. Bosch Rexroth also offers the corresponding valves for electrohydraulic hitch control for all versions.

Tractors above the 200 h.p. limit are almost exclusively used with electrically controlled valves with high flow rates. The new Rexroth SBx4 valve platform meets these requirements with freely combinable mechanically and electrically actuated sandwich valves. Compared to the world's bestselling predecessor valves for tractors, Rexroth SBx3, the flow rate has increased to 120 or 170 l/min at an operating pressure of up to 220 bar. The hydraulic ports are uniformly aligned in all variants. The modular combination of valves with varying flow rates in one control block reduces the piping work and provides every consumer with the exact amount of energy required. In addition, the new series also includes matching hitch valves. These cover the whole range from single- to double-acting system solutions with scalable additional functions.

Designers can combine up to seven valve sections in one block and therefore control a comprehensive range of tractor peripherals. By using an end valve instead of an end plate, new options are available and the solution requires less installation space and weighs less too. The new valves make maintenance easier with their separately exchangeable electronics. The newly constructed Rexroth SB24-M, SB24-EHS1 and SB34-EHS1 valves with leak-free check valve and optional thermal unloading generate lower internal friction and pressure losses in comparison to the previous version.

Even in tractors between 100 h.p. and 200 h.p., the majority of them use electronically controlled valves. Along with the SB24-EHS1 valves, Bosch Rexroth has developed the compact, highly integrated platform SM12-EHR12 for this segment. This platform is based on tried-and-tested components and expands the performance range to a flow rate of 60 l/min at an operating pressure of 200 bar. With the modular block, tractor manufacturers can control up to ten consumers and thereby implement all tractor-relevant functions: from pulling and alternating plows to free-moving front loaders with locking and kickout function.

For small tractors there tends to be an increased range of functions. With ROS12 (OC), Bosch Rexroth provides a highly flexible locally manufactured platform for open circuits specially for the Asian market. The functions include flow control with integrated priority valve. The valve block can be supplied by means of either gear pumps or variable pumps. The platform is compatible with SM12 and the hitch valve EHR 12. The Electrohydraulic Hitch Control EHC-8 from Bosch Rexroth replaces traditional mechanical control and allows significantly improved soil cultivation, even with small tractors.

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, and Factory Automation 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, more than 29,500 associates generated sales revenue of approximately 5 billion euros in 2016.

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The Bosch Group is a leading global supplier of technology and services. It employs roughly 390,000 associates worldwide (as of December 31, 2016). The company generated sales of 73.1 billion euros in 2016. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. As a leading IoT company, Bosch offers innovative solutions for smart homes, smart cities, connected mobility, and connected manufacturing. It uses its expertise in sensor technology, software, and services, as well as its own IoT cloud, to offer its customers connected, cross-domain solutions from a single source. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.” The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers nearly every country in the world. The basis for the company’s future growth is its innovative strength. At 120 locations across the globe, Bosch employs some 59,000 associates in research and development.

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Manuela Kessler
Maria-Theresien-Straße 23
97816 Lohr am Main
Phone: +49 9352 18-4145

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