Inqanawa libhaka kusukela kumthwalo futhi kuphulwa, ukubuyiselwa okokuqala nokususwa kwezimali, kulandela ukususwa okugcwele ngaphakathi kukaPPU. Inye indawo ikhona kubo ihhovu ukuze ibhakwe, emva koko inye ingcinwa ukuthi iphumelele ngaphakathi kwe-expanion ukuze ibhakwe futhi iyahluleke. Kesho ikhona kwi-exchanger eyinkimbini yekholwa xa ihlulekile ngaphansi kwayo emva kokunyuswa kwe-expanion ekusebenza njengomshinelulo wokuhluleka. Emva kwalokho ikhona kwi-column engezansi ukuze ithuthwe kumdlalo. Inye indawo isohlulwa kwi-liquid phase ngaphakathi kwe-exchanger eyinkimbini futhi ikhona kwi-column engezansi ukuhlwebula. Amakhanda esikhundla akhona kwi-exchanger eyinkimbini, ayahlulwa ku-dew point, bese akhona kwi-column engezansi ukuze ahwebule. Emva kwe-hwebulo kwi-column engezansi, i-liquid oxygen etholakala kumphaya, nasekupheleni kwesizansi kunesimo sokuthenga kwe-liquid air ne-oxygen-rich liquid air. Le zintathu zikhona ezindawonke ezahlukene zesi-column phansi njengezimali zembaliyo ukuze zithuthwe kumdlalo. Ekugcineni, i-oxygen yokuthengisa etholakala ekupheleni kwe-column ephezulu, futhi i-nitrogen yokuthengisa etholakala kumphaya. Emva kwe-reheating ngaphakathi kwe-heat exchanger, izinto zotho zithunyelwa kusuka kwi-cold box. Ngaphezu kwezinye izinhlelo, le ndlela inamazinga ka-argon. Izihlandlo ezinezimali ze-argon zithunyelwa kusuka emhlabeni waphansi kwe-column ephezulu bese zikhona kwi-argon enrichment column. Ngemdlalo kwi-argon enrichment column, igesi ezigcwele ngu-argon ithunyelwa kumphaya, futhi isihlandlo esinezimali eziningi ze-oxygen etholakala ekupheleni futhi ilahlekelayo kwi-column ephezulu ukuze ihwebule.