At the heart of each of our custom packages lies an oil-free rotary-type positive-displacement compressor.
Rotary-type positive displacement compressors are typically known as ‘roots-type blowers’ or ‘vacuum boosters’, according to the situation in which they are used:
The rotary-type positive-displacement compressor incorporates two intermeshing rotors mounted on parallel shafts. In a twin-lobe compressor, each rotor has two lobes (four lobes per compressor). In a tri-lobe machine each rotor has three lobes (six lobes per compressor).
The rotary-type P.D. compressor was invented by two brothers, Philander Higley Roots and Frances Marion Roots, who patented their design in 1860.