Air Separation Column is a Packaged Unit with Outer Steel Casing, Main Heat Exchanger, Liquefier, Lower Column, Upper Column, Condenser, Dcpl Cooler, Liquid Oxygen /Nitrogen Filter. Stainless Steel Cooling Pipes, Insulation Material, Digital Auto Scanner With Temperature Meter Pt100 Sensor, DP Gauge Manometer Wika German /Feibig Expansion Valvesof Italian Design Stainless Steel Column Is Unique Feature.