Product Manual

Design and function
22 firstAir screw compressor FAS03 – 37
4.2 Introduction to the compact, oil-lubricated screw compressor
The compact, oil-lubricated screw compressor is characterised by its reliability, low wear, low vibration prop-
erties, smooth running operation and high efficiency.
4.2.1 Brief description of the function
The fresh air supplied by the installed cooling air ventilator is filtered
through the intake filter. The air flows over the intake regulator into the
compressor stage, where it is compressed together with the injected
Oil to the final pressure. The compressed air is largely separated from
the Oil in the Oil pressure tank. The subsequent oil separator removes
the remaining Oil from the compressed air. The compressed air then
flows over the minimum pressure valve and return valve into the com-
pressed air aftercooler and is cooled down before it leaves the screw
compressor through the compressed air connection.
The Oil is separated from the compressed air in the Oil pressure tank
and the oil separator and flows to the Oil cooler. The Oil temperature
regulator adds the cooled Oil to the hot Oil via the Oil cooler bypass
in accordance with the temperature set point. Finally, the Oil filter
cleans the Oil before it is injected into the compressor stage once
again.