Kwinjiza no gusohoka biranga icyuho cya vacuum. Hariho ingingo yo hasi kuri buri murongo uhuye na dogere zitandukanye ku gishushanyo, cyitwa imbaraga ntarengwa zafasha ingingo, ni ukuvuga aho itandukaniro ryimiturire rikora kuri sefdo diaphGM nkuko imbaraga zinjiza ziyongera. Kuva iyi ngingo, kwiyongera kw'ibisohoka bingana no kwiyongera kw'imbaraga zinjiza.
Nk'uko QC / T307-1999 "imiterere ya tekiniki yo guhagarika icyuho cya vacuum", urubura rwa vacuum mu gihe cyo kwipimisha ni 66.7 ± 1.3Kpa (500 ± 10mhhg). Ibiranga nibisohoka biranga icyuho cya vacuum kigenwa nubusanzwe nuburyo bwo kubara. Dukurikije ihame ry'akazi rya Byumu Booster, ibipimo bibiri biranga ku murongo uranga birashobora kugereranywa: imbaraga zinjiza zijyanye n'imbaraga nyinshi n'amafaranga; Ikigereranyo cyo gusohoka mu mbaraga zinjiza mbere yimbaraga ntarengwa, aribyo igipimo cyamashanyarazi
