... size air separation unit Oxygen output 50Nm3/h Oxygen Purity 99.6% Working pressure <1.2MPa KDON50 small size air separation unitOxygen output: ... column,has minimal cooling lost,Shorten starting time. This Oxygen producing equipment exported to Iraq in 2009 Scope of supply ... set, Rectification Column 1 set ,Refrigerator 1 set , Liquid Oxygen Pump 1 set,Filling Unit 1 set, Connecting pipe 1 ...