1 year ago

MDA Technologies 2/2015

MDA Technologies 2/2015


MACHINE ELEMENTS Tough fluid solutions for numerous industries Highly resistant, compact cooling water hoses for internal combustion engines, an electrically conductive fuel hose, and a new generation of OLN lines for oil and oil/air mixtures – these are the highlights which ContiTech Fluid Technology will be presenting at the Hanover Fair. 36 MDA Technologies 2/2015

MACHINE ELEMENTS Its resistance to cooling water and the usual additives in the form of anti-freeze and anti-corrosion agents makes the Conti cooling water hose the ideal solution for cooling systems in internal combustion engines. It is suitable for a media temperature of up to 115 °C, or briefly even 135 °C. Thanks to a special strength member, it can be used at ambient temperatures of up to 190 °C, or briefly even 210 °C. This means no additional heat protection is required. Where in the past steel-braid or Teflon lines were used, ContiTech now uses very light rubber lines which have been adapted to the ever-increasing temperatures in the engine surrounds. The compact hose design also enables very small bending radii. The Conti cooling water hose is also configurable as a molded hose for particularly tight package spaces. ContiTech has also developed an alternative for higher temperatures up to 230 °C, i.e. cooling water hoses made of silicone. These can be supplied both as bulk stock and as molded hoses. Inner lining prevents sparking Electrically conductive fuel lines have been fitted as standard in passenger cars for some time. Now this application – not least because of appropriate regulations in the US – is becoming increasingly attractive for industrial trucks. The conductive inner lining made of FPM (fluorocarbon rubber) prevents static buildup at high throughflow rates which, in the worst-case scenario, could result in sparking and spontaneous ignition of the vehicle. ContiTech’s highly flexible fuel lines are suitable for gasoline, diesel and biodiesel and can withstand operating temperatures from -40 to +150 °C. Another characteristic feature is their low permeation rate, and they also meet the most stringent cleanliness requirements. The outer lining is resistant to radiant heat up to 150 °C, and briefly even 175 °C. Diesel fuels have been blended with renewable raw materials for some time. In Germany up to 7 % RME or PME (rapeseed or palm oil methyl ester) is currently added to mineral oil-based diesel fuels. Higher RME proportions are under discussion. However, RME has been shown to be more aggressive than the mineral oil diesel, which results in faster aging and thus earlier failure of the conventional NBR-based hoses and lines. ContiTech Fluid Technology therefore uses modern, three-dimensionally cross-linked fluoroelastomer materials (FPM-FPM) for fuel hoses and lines which have a very wide temperature range of -40 to more than +200 °C for use with fuels containing RME. These materials are just as non-critical for the currently used mixing ContiTech’s electrically conductive fuel hose prevents static buildup at high throughflow rates ratios as for the possible increased levels in the future. ContiTech also offers fuel lines which withstand both pure rapeseed oil and rapeseed methyl ester (RME), also known as biodiesel, but can be used with conventional diesel fuel, in addition. The next big thing with regard to fuels is dual fuel – the combined injection of gas and diesel fuels. The latest generation of fuel hoses from ContiTech represents an ideal basis for material which can be developed in this direction. The new elastomer fuel lines from ContiTech have been adapted to the ever-increasing pressures and temperatures in truck engine compartments too. At present, they are already resistant to an operating pressure of up to 35 bar and temperatures of up to 135°C, and testing is already in progress at ContiTech with a view to expanding these parameters. ContiTech is supporting the trend towards the use of alternative fuels, which is particularly prevalent in Europe and North America, with hose assemblies for gases such as CNG and LNG. OLN lines for hot, tight package spaces ContiTech’s OLN lines are used wherever oil-containing air has to be conveyed, such as in compressors, trucks and industrial applications. The company has now reengineered these hoses, which have been tried-and-tested components for decades, incorporating the latest in materials technology. FKM-based hoses for oil and oil/ air mixtures are the newest development. They withstand continuous temperatures of up to 230 °C at 15 bar, with transient peaks of 250 °C. This is becoming necessary because of the growing trend towards enclosed units, higher engine outputs and the increasing use of turbochargers. As a result, the ambient temperatures to which the hoses and lines are exposed are rising. These latest adaptations mean that ContiTech’s hoses are equipped to cope with these and future requirements. Other benefits of this new development are their very compact design and the capability of forming tight bending radii with these hoses which are also available as molded hoses. About Company name: ContiTech Business: Rubber and Plastics Technology Headquarters: Hanover, Germany Turnover: € 5.4 bn Employees: 38,000 Products: components like hoses, belts, mounts and systems for the automotive industry and other important industries MDA Technologies 2/2015 37


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