The Rotorcomp representative of Germany in the supply and installation of separators for oil from the compressed air system is known as ETC. The compressed air oil after the withdrawal of the converter is less than 01/0 mg per cubic meter. The system then injected and oil-free compressors are placed before drying. Compressed air by the compressor, pre-heated in a heat exchanger and then enters the catalytic converter material is filled ETC which is the oxidation of hydrocarbons into water and carbon dioxide to be made. An electric heater, ETC converter to the required temperature for the degreased keeps compressed air. The price of ETC with Compressor Oil-inject substantially less than the price of a device Oil-free compressors are of the same capacity. At least 15,000 hours guaranteed good performance of the catalyst system.