Shanghai Lianfeng Gas Co., Ltd. ke moetsi ea ka sehloohong, mofani oa thepa, le fektheri Chaena, e fanang ka likarolo tsa boleng bo holimo tsa Vpsa Oxygen Generation Units tse hloekileng 90%. Sehlahisoa sa rona se tsebahalang se etselitsoe ho hlahisa oksijene ka mokhoa o atlehileng le o theko e boima bakeng sa lits'ebetso tse fapaneng tsa indasteri. Sehlopha sa rona sa Vpsa Oxygen Generation Unit se sebelisa theknoloji ea Vacuum Pressure Swing Adsorption (VPSA), e nolofalletsang ho arohana ha oksijene ho likhase tse ling tse moeeng. Sistimi ena e ka hlahisa oksijene ka boemo ba bohloeki bo fihlang ho 90%, ho fihlela litlhoko tse khethehileng tsa bareki ba rona. Ka lilemo tsa boitseanape ba lisebelisoa tsa ho fehla khase, re thehile botumo ba ho fana ka likarolo tse tšepahalang le tse tšoarellang tsa Vpsa Oxygen Generation Units. Lihlahisoa tsa rona li sebelisoa haholo liindastering tse kang ho itšeha ka tšepe, tlhahiso ea likhalase, ho hloekisa metsi a litšila, le tse ling. Joaloka morekisi ea tšepahalang, re etelletsa pele boleng ba sehlahisoa le khotsofalo ea bareki. Re ikemiselitse ho fana ka litharollo tse ncha tse fihlelang litlhoko tse fapaneng tsa bareki ba rona. Ikopanye le Shanghai Lianfeng Gas Co., Ltd. bakeng sa litlhoko tsohle tsa hau tsa Vpsa Oxygen Generation Unit.