I-valve ye-shuttle yebhola eyodwa enezimbobo ezi-3 zamapayipi asemgqeni: lapho izimbobo i-V1 kanyeI-V2 ixhunywe emigqeni yomsebenzi we-2, i-valve iletha izingcindezi eziphezulu kakhulu ze-2echwebeni elivamile C. Ibhola elilodwa livumela ukubola kwesignali yokucindezelalapho zombili izimbobo zomsebenzi zehlela ezingeni eliphansi lokucindezela.