PI 002-17 Lohr am Main, 2017-02-01

Smart throttle valve for higher pressure ranges

The newly developed digital electronics developed by Rexroth offer simplified optimization of hydraulic controller parameters and improved control quality.

New on-board digital electronics for improved control quality

Machine manufacturers can now realize hydraulic systems with reduced dimensions and improved control behavior thanks to the new Rexroth 2-way proportional throttle valves. These cartridge valves are designed for a maximum operating pressure of 420 bar. The newly developed on-board electronics enable compensation of decentralized disturbances for improved control quality.

In hydraulics, the trend towards higher pressure ranges becomes more and more important. This enables machine and system manufacturers to use smaller system components to further support the traditional strengths of hydraulics, force density and low space requirements. These requirements were taken into account by Rexroth in the development of the new 2WFCE throttle valves with a maximum operating pressure increase from 315 to 420 bar.

The new 2WFCE cartridge valves are used as throttle valves for increased flow rates or in combination with a pressure compensator for flow control. For example, they realize decompression of the system in press applications or control the rapid traverse velocity of pressing cylinders. In plastics processing machines, they are applied for pQ control in displacement pump systems or for discharge throttling at closing units for regenerative operation.

The newly developed digital electronics with microprocessor enable uncomplicated optimization of controller parameters at clearly increased dynamics. The units combine high response sensitivity and clearly improved frequency characteristics at reduced hysteresis. This enables improved control quality at shorter cycle times. During production, Rexroth applies automatic calibration of all valves and stores individual data in the electronics. This way, the time and effort of commissioning in series production of machinery is reduced. In case of power failure or cable break, the main stage is automatically switched to a fail safe position.

As no analog potentiometers are required, the valves are more resistant to vibrations. Additionally, the admissible ambient temperature is increased from 50 to 60°C which makes the valves suitable for direct installation at hydraulic pumps and use in enclosed spaces.

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 31.100 associates generated sales revenue of approximately 5.4 billion euros in 2015.

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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). According to preliminary figures, 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 industry. 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 create solutions for a connected life, and to improve 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 450 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing, engineering, 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 59,000 associates in research and development.

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Susanne Herzlieb
Maria-Theresien-Straße 23
97816 Lohr am Main
Phone: +49 9352 18-1573

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