Ama-valves uvemvane wokugcina ayingxenye ebalulekile emishinini yezimboni, ikakhulukazi ngaphakathi kwesigaba se-valve. Lawa ma-valve aklanyelwe ukulawula ukugeleza koketshezi oluhlukahlukene namagesi ezinhlotsheni ezahlukahlukene zokusebenza. Idizayini yokugcina yokugcina yala ma-valve inikeza ukuxhumana okuphephile nokuvumela ukuvuza, kuqinisekisa ukusebenza okusebenza kahle kanye nesikhathi esincane. Enye yezinzuzo ezibalulekile zokuphela