Olupilẹṣẹ atẹgun VPSA jẹ adsorption ti a tẹ ati olupilẹṣẹ atẹgun atẹgun igbale. Afẹfẹ wọ ibusun adsorption lẹhin titẹkuro. A pataki molikula sieve selectively adsorbs nitrogen, erogba oloro ati omi lati afẹfẹ. Awọn sieve molikula lẹhinna jẹ desorbed labẹ awọn ipo igbale, ti n ṣe atunlo atẹgun mimọ giga (90-93%). VPSA ni agbara agbara kekere, eyiti o dinku pẹlu iwọn ọgbin ti o pọ si.
Awọn olupilẹṣẹ atẹgun ti Shanghai LifenGas VPSA wa ni ọpọlọpọ awọn awoṣe. Olupilẹṣẹ ẹyọkan le gbejade 100-10,000 Nm³/h ti atẹgun pẹlu 80-93% mimọ. Shanghai LifenGas ni iriri lọpọlọpọ ninu apẹrẹ ati iṣelọpọ awọn ọwọn adsorption radial, pese ipilẹ to lagbara fun awọn ohun ọgbin nla.