rotary screw compressors screw compressors twin-screw compressor manufacturer ROTARY SCREW COMPRESSORS Rotary screw compressors are used in a diverse range of applications. Typically, they are used to supply compressed air for general industrial applications. Trailer mounted diesel powered units are often seen at construction sites, and are used to power air operated construction machinery. For 20 years "The Compressor People" ª, G&S Hermetique Inc, has been THE source for reciprocating compressors. Now we offer you remanufactured rotary screw compressors with the same quality and service so many rely on.