Used 278 MTPD liquid nitrogen plant for sale. The plant was commissioned in 2004. It produces CGA Grade L Type II liquid nitrogen (99.998% purity at dew point -90 °F). The air separation unit separates atmospheric air into its primary elements: Nitrogen (78 %), oxygen (21%), and argon with trace amounts of other gases (1%). This process consists of three stages. First is the compression stage where atmospheric air is pre-filtered, compressed and then subsequently cooled. Next is the purification stage in which the process air is then passed through reversing valves which remove water vapor, carbon dioxide and hydrocarbons. The third stage is the distillation stage. Process air enters into a distillation column where it is separated. Average power consumption 0.88 KWH/Nm3.