PI 015-16 Lohr am Main, 2016-02-24

Robust and quick: The new 2-way directional poppet valve family

Especially robust: The KSVS valves from Rexroth resist up to 720 hours of salt spray testing.

Large fine control range with subsequent boost function

Rexroth further expands their wide range of compact hydraulic control elements with the new 2-way directional poppet valve family. The new components are especially robust and, thanks to the boost function, allow for accelerated final movements when lifting and lowering loads. In addition, the factory-calibrated valves fulfill the fork lift truck manufacturers' requirements for narrow tolerances for valve characteristics.

The trend towards higher operating pressures is also growing in mobile applications, such as fork lift trucks and other material handling equipment. Bosch supports this approach with the new KSVS poppet valve family for operating pressures of up to 350 bar. The pilot-operated 2-way/2 position valves are closed in the de-energized position and shut off without leakage.

The fine control range with low hysteresis covers over 80 percent of the nominal flow range and is complemented by a boost function at the end. This characteristic increases productivity through quick final movements when lifting and lowering the lifting forks. In addition, the valve family's low pressure drop allows for quick lowering of the lifting forks through their own weight.

These valves are particularly robust as they have been specially developed for use in mobile working machines. Their service life is at least two million switching cycles at 350 bar. They are designed for ambient temperatures of up to 90°C at 100 percent duty cycle. In the salt spray test, as per DIN 50021, they achieved a value of 720 hours and therefore offer a significantly longer service life than conventional valves on the market.

The reproducibility of valve behavior for hydraulic components is becoming more and more important for the manufacturers of mobile working machines so that they are able to make their machines easier to control with regard to software and with reproducible results. Rexroth fulfills these requirements and calibrates all KSVS valves in the factory so that the individual variation of the poppet valve's cracking pressure is very low. Manufacturers can therefore install them straight away without time-consuming mechanical adjustment and control them simply via electronics.

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 33,700 associates generated sales revenue of approximately 5.6 billion euros in 2014.

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The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). According to preliminary figures, the company generated sales of more than 70 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 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 2015, Bosch applied for some 5,400 patents worldwide. 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.”

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

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