Used (2) 100 TPD each Air Products Oxygen Vacuum Swing Adsorption Plants built in 2010. These facilities consists of Oxygen Vacuum Swing Adsorption (O2 VSA) plants and oxygen compressors. The VSA plant separates air into its two principal constituents: nitrogen and oxygen, using adsorption technology. The oxygen is sent to an O2 compressor and then delivered to point of use as product. The nitrogen, along with any contained water vapor and carbon dioxide, is safely vented.