Rotary Air Compressors

Rotary Air Compressors - Sizes 30 CFM to 3000 CFM
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 .Due to the simple design and few wearing parts, rotary screw air compressors are easy to maintain, operate and provide great installation flexibility. Rotary air compressors can be installed on any surface that will support the static weight. The two stage oil flooded rotary screw air compressor uses pairs of rotors in a combined airend assembly. Compression is shared between the first and second stages flowing in series. This increases the overall compression efficiency up to fifteen per cent of the total full load kilowatt consumption. The two stage rotary air compressor combines the simplicity and flexibility of a rotary screw compressor with the energy efficiency of a two stage double acting reciprocating air compressor. Two stage rotary screw air compressors are available air cooled and water cooled and full packages.
The oil free rotary screw air compressor utilizes specially designed airends 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.
As you can see, rotary screw air compressors are available air cooled and water cooled, oil flooded and oil free, single stage and two stage. There is a wide range of availability in configuration and in pressure and capacity.

Nirvana 37-160kW
Matching a standard variable speed inverter with a HYBRID PERMANENT MAGNET; coupled with a time-proven airend, Nirvana represents a stunning advance in compressor technology. This new rotary compressor provides unparalleled energy efficiency at all speeds and offers superb reliability. There are no motor bearings, gears, pulleys, belts, couplings or motor shaft seals to wear out, leak or need replacing. In addition, there is nothing to get out of alignment.

Energy Efficiency
At full load, Nirvana will produce the most air using the least energy; and will continue to do so down to loads as low as 20%. Nirvana runs at 95% efficiency throughout its entire speed range.

Exceptional Reliability
Nirvana has fewer rotating parts than any other compressor in its class. The HPM motor uses no bearings and directly drives the compressor, eliminating gears, pulleys, belts, couplings and motor shaft seals.

Transcendent Technology
Nirvana's exclusive Hybrid Permanent Magnet motor has revolutionized compressor performance by providing more air over a wider range with no increase in power consumption.