I-Air Separation Unit (ASU) sisixhobo esisebenzisa umoya njenge-feedstock, sicinezele kwaye siwupholise kakhulu kubushushu be-cryogenic, ngaphambi kokwahlula i-oksijini, i-nitrogen, i-argon, okanye ezinye iimveliso zolwelo kumoya wolwelo ngokulungiswa. Ngokuxhomekeke kwiimfuno zomsebenzisi, iimveliso ze-ASU zinokuba sinye (umzekelo, i-nitrogen) okanye ezininzi (umz., i-nitrogen, i-oksijini, i-argon). Inkqubo inokuvelisa iimveliso zolwelo okanye zerhasi ukuhlangabezana neemfuno ezahlukeneyo zabathengi.