Atlas Copco Rotary Screw Compressors

Rotary air compressors are positive displacement compressors. The most common rotary air compressor is the single stage helical or spiral lobe oil flooded screw air compressor. These compressors consist of two rotors within a casing where the rotors compress the air internally. There are no valves. These units are basically oil cooled (with air cooled or water cooled oil coolers) where the oil seals the internal clearances.

Since the cooling takes place right inside the compressor, the working parts never experience extreme operating temperatures. The rotary compressor, therefore, is a continuous duty, air cooled or water cooled compressor package.

Rotary screw air compressors are easy to maintain and operate. Capacity control for these compressors is accomplished by variable speed and variable compressor displacement. For the latter control technique, a slide valve is positioned in the casing. As the compressor capacity is reduced, the slide valve opens, bypassing a portion of the compressed air back to the suction. Advantages of the rotary screw compressor include smooth, pulse-free air output in a compact size with high output volume over a long life.

The oil free rotary screw air compressor utilizes specially designed air ends to compress air without oil in the compression chamber yielding true oil free air. Oil free rotary screw air compressors are available air cooled and water cooled and provide the same flexibility as oil flooded rotaries when oil free air is required.


Atlas Copco Rotary Screw Compressors


Fixed Speed

Atlas Copco Gx 2-11, 3-15HP

Atlas Copco GA 5-11, 7.5-15HP

Atlas Copco GA 11-30, 15-40HP

Atlas Copco GA 15-22, 20-30HP

Atlas Copco GA 30-45, 40-60HP

Atlas Copco GA 37-75, 50-100HP

Atlas Copco GA 90 – 160, 125-200HP

Atlas Copco GA 110-160, 150-200HP

Atlas Copco G 110-160, 150-200HP

Atlas Copco GA 200-315, 250-400HP

Atlas Copco G 200-250, 250-300HP


Variable Speed Drive

Atlas Copco GA VSD+

Atlas Copco GA 5-11 VSD 7.5-15HP

Atlas Copco GA 15-30 VSD, 20-40HP

Atlas Copco GA 37-55 VSD, 50-75HP