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Media / Application stories / Atlas Copco to supply 200 oil-free scroll compressors to Siemens and the Austrian Federal Railways

Atlas Copco to supply 200 oil-free scroll compressors to Siemens and the Austrian Federal Railways


Wilrijk, Belgium, January 2014. Atlas Copco will supply 200 oil-free scroll compressors SFR 5 to Siemens Germany for its end customer ÖBB, the Austrian Federal Railways. The compressors will provide oil-free air for the brake system, active tilting suspension and other auxiliary systems in the Siemens Desiro ML type train series.

Tough requirements

Siemens Desiro train

Siemens Desiro train type, copyright by Zcochrane

Siemens Germany had several requirements for ÖBB’s compressor systems. The compressors had to be oil-free, equipped with an integrated dryer system, 25-liter aluminum air tank and all packed under a steel plate cover to protect the unit against powder snow, stone blast and heavy dust loads. The compressors had to generate at least 340 liters/min at 10 bar and without any winter preheating time before operation, offer full redundancy should a compressor ever fail, feature low noise and vibration levels, and have a total weight of less than 300 kg, including all equipment.

A completely customized solution

Atlas Copco’s Railway Competence Center developed a completely customized oil-free compressed air solution with a fully integrated maintenance-free membrane dryer and proven railway core components. Atlas Copco chosed a 100% oil-free 5.5 kW SFR 5 scroll compressor directly driven by a 400VAC 50 Hz electric motor. The SFR 5 is a simple, highly reliable compressor package design, providing 400 l/min at 10 bar after the dryer. It incorporates a minimum of moving parts; a shaft-driven cooling fan; corrosion-resistant materials and sturdy construction to withstand external vibrations, shock loads and projectiles. The SFR 5 performs in temperatures from -25°C to +50°C, optional up to +75°C, and is designed to withstand extreme weather conditions. 

The air treatment is carried out by a fully integrated water separator, fine pre-filter and a maintenance-free membrane dryer that supplies clean, dry, oil-free compressed air with a quality class of at least 2.2.0 acc. to ISO 8573-1.

Compact, less noise, less vibration

SFR 5 railway compressor

SFR 5 scroll compressor

The SFR 5 features long service intervals, which further reduces its overall life cycle costs, and is backed by Atlas Copco’s service network in Austria.The 200 compressors, plus 12 additional units for parallel test operation, are scheduled for delivery between June 2014 and August 2017. 

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Atlas Copco’s Compressor Technique business area provides industrial compressors, gas and process compressors and expanders, air and gas treatment equipment and air management systems. It has a global service network and offers specialty rental services. Compressor Technique innovates for sustainable productivity in the manufacturing, oil and gas, and process industries. Principal product development and manufacturing units are located in Belgium, Germany, the United States, China and India. 

Atlas Copco is an industrial group with world-leading positions in compressors, expanders and air treatment systems, construction and mining equipment, power tools and assembly systems. With innovative products and services, Atlas Copco delivers solutions for sustainable productivity. The company was founded in 1873, is based in Stockholm, Sweden, and has a global reach spanning more than 170 countries. In 2012, Atlas Copco had 39 800 employees and revenues of BSEK 90.5 (BEUR 10.5).