Rotary screw air compressors are positive displacement compressors. The most common type is the single stage helical or spiral lobe oil flooded screw air compressor. They consist of two rotors within a casing where the rotors compress the air internally. These units are oil cooled (with air cooled or water cooled oil coolers) where the oil seals the internal clearances, oil free versions are readily available also.

The rotary screw air compressor is a continuous duty, air cooled or water cooled, industrial compressor package.

Rotary screw air compressors are easy to maintain and operate. Capacity control for these compressors is accomplished by variable speed or load/unload controls. 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 as either air cooled or 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