1. Iskar da ba ta da amfani tana fitowa daga iska, tana ratsa matattarar iska don cire ƙura da sauran ƙwayoyin injina sannan tana shiga matattarar iska mara amfani don matse ta hanyar matattarar matakai biyu zuwa kimanin 0.65MPa(g). Tana ratsawa ta cikin mai sanyaya kuma tana shiga na'urar sanyaya iska don a sanyaya ta zuwa 5~10℃.

Sannan sai a je wurin tsarkake MS don cire danshi, CO2, da carbon hydrogen. Mai tsarkakewa ya ƙunshi tasoshin ruwa guda biyu da aka cika da sieve. Ana amfani da ɗaya yayin da ake sake farfaɗo da anther ta hanyar sharar nitrogen daga akwatin sanyi da kuma ta hanyar dumama hita.

2. Bayan an tsarkake shi, ana amfani da ƙaramin ɓangare na iskar gas mai ɗaukar iska don faɗaɗa turbine, wani kuma yana shiga cikin akwatin sanyi don a sanyaya shi ta hanyar reflux (tsabtataccen iskar oxygen, tsantsar nitrogen da sharar nitrogen) a cikin babban musayar zafi. Ana cire wani ɓangare na iska daga tsakiyar babban musayar zafi kuma ana tura shi zuwa injin faɗaɗa don samar da sanyi. Yawancin iskar da aka faɗaɗa tana wucewa ta cikin na'urar sanyaya iska wadda iskar oxygen ke sanyaya ta daga saman shafi don a kai ta zuwa saman shafi. Ƙaramin ɓangare na iska yana wucewa ta hanyar wucewa zuwa bututun nitrogen kai tsaye kuma ana sake dumama shi don fita daga akwatin sanyi. Sauran ɓangaren iska yana ci gaba da sanyaya shi don kusan iskar ruwa ta yi ƙoƙarin zuwa ƙasan shafi.

3. A cikin iskar ƙasa, iska tana rabuwa kuma tana yin ruwa kamar ruwa nitrogen da iskar ruwa. Wani ɓangare na ruwa nitrogen ana cire shi daga saman ƙasan. Iskar ruwa bayan an sanyaya ta kuma an matse ta ana kai ta tsakiyar babban saman a matsayin reflux.

4. Ana cire iskar oxygen daga ƙasan ginshiƙin sama sannan a sake dumama shi ta hanyar amfani da na'urar sanyaya iska mai faɗaɗa, wato babban mai musayar zafi. Sannan a fitar da shi daga ginshiƙin. Ana cire nitrogen mai datti daga saman ginshiƙin sama kuma a sake dumama shi a cikin na'urar sanyaya iska da babban mai musayar zafi don ya fita daga ginshiƙin. Ana amfani da wani ɓangare na shi azaman iskar gas mai sabuntawa don tsarkakewar MS. Ana cire nitrogen mai tsabta daga saman ginshiƙin sama kuma ana sake dumama shi a cikin iska mai ruwa, na'urar sanyaya iska mai ruwa da kuma na'urar musanya zafi don a fitar da shi daga ginshiƙin.

5. Ana matse iskar oxygen daga cikin ginshiƙin distillation zuwa ga abokin ciniki.