Amashubhu wegazi alahlwayo, abizwa nangokuthi amashubhu wokuqoqa igazi le-vacuum, adlale indima ebalulekile emkhakheni wezokwelapha wokuqoqa nokugcina amasampula egazi. Inqubo yokukhiqiza yalawa mashubhu iyinqubo yokucophelela futhi ebalulekile eqinisekisa ukuphepha nokunemba kokuqoqwa kwegazi. Kulesi sihloko, sizobhekisisa inqubo yokukhiqiza yamashubhu wokuqoqa igazi le-vacuum.
Ukukhiqizwa kwamashubhu egazi alahlekile aqala efektri, lapho izinto eziluhlaza ezinjengepulasitiki, ama-rubber stoppers kanye nezithasiselo zikhethwe ngokucophelela futhi zihlolwe ngekhwalithi. Lezi zinto zokwenziwa zibe sezicutshungulwa futhi zibunjwe esimweni se-tube, kulandela imihlahlandlela eqinile yokuhlangabezana namazinga embonini.
Lapho nje amashubhu akhiwa, athola inqubo yokubulala inzalo ukuze asuse noma yikuphi ukungcola okungaba khona futhi aqinisekise ubumsulwa bamasampula egazi aqoqwe. Lesi sinyathelo sibalulekile ekuvikeleni ubungozi bokutheleleka nokugcina ubuqotho bamasampula.
Okulandelayo, amashubhu ahlanganiswe namashubhu we-vacuum kanye nama-rubber stoppers, adala indawo ebekwe uphawu lokuqoqwa kwegazi. I-vacuum ngaphakathi kweshubhu isiza ukudweba igazi libe ishubhu kahle futhi ngokunembile ngaphandle kwesidingo sengcindezi eyengeziwe noma yokumunca okwengeziwe.
Ngemuva komhlangano, amashubhu ahlolwe nganoma yiziphi izici noma ukungapheleli okungabeka engcupheni ukusebenza kwawo. Izindlela zokulawula ezisezingeni eliphezulu zisendaweni yokuqinisekisa ukuthi amashubhu kuphela ahlangana namazinga aphezulu athunyelwa ukuze asatshalaliswe.
Ekuphetheni, ukukhiqizwa kwamashubhu wokuqoqa igazi le-vacuum kuyinto eqondile futhi enolwazi edinga ukunakwa imininingwane nokunamathela kumazinga aqinile. Lawa amashubhu adlala indima ebalulekile emkhakheni wezokwelapha, eqinisekisa iqoqo eliphephile nelinembile lamasampula egazi ngezinjongo zokuxilonga. Ngokuqonda inqubo yokukhiqiza yamashubhu egazi alahlekile, singabonga imizamo nokunakekela okuya ekukhiqizeni la madivayisi abalulekile ezokwelashwa.