Inzira eshatu bypass damper valve irimo umubiri wa valve ebyiri, disiki ebyiri, intebe ebyiri, icyayi kimwe, na silinderi 4. Umubiri wa valve ugabanyijemo ibice bitatu A, B, na C bihujwe hanze nintebe ya plaque. Ibikoresho bifunga kashe byashyizwe hagati yumubiri wa valve nintebe ya plaque. Isahani yo guhumeka ikirere mu cyuho ihujwe na silinderi binyuze mu mwobo uhuza. Muguhindura umwanya wa plaque ya valve, icyerekezo cya gazi mumiyoboro irashobora guhinduka; Bitewe no guhanahana ubushyuhe binyuze mububiko bwubushyuhe bwumuriro, ubushyuhe bwakazi bwa reveri ya reveri iracyari hasi, kandi nta bisabwa bidasanzwe kubikoresho bya valve isubira inyuma.

Nyamara, bitewe nibisabwa kugirango umusaruro uhoraho, valve isubira inyuma ikeneye kunesha kwambara no kurira biterwa numukungugu uri muri gaze ya flue n'ingaruka zibora. Ibice bya mashini bigomba kwemeza kwambara no kurira biterwa no guhinduranya kenshi ibice, bisaba kwizerwa cyane nubuzima bwakazi.