Ngokusheshisa kwenqubo yokuthuthukiswa kwezimboni, ukusetshenziswa kwama-valve aseShayina kwezobunjiniyela kuyanda kakhulu, futhi uhlobo lwawo nenombolo kuyanda. Ukukhethwa kwama-valve aseShayina kuthinta ngokuqondile ukuphepha, ukuzinza nokusebenza kahle kwemishini yezimboni, ngakho-ke, indlela yokuthenga ama-valve aseShayina ngekhwalithi enhle nokusebenza okuzinzile kuye kwaba yindaba ekhathazayo kakhulu kubasebenzisi abaningi. Lesi sihloko sizoxoxa ngezinkinga ezivamile zokuthengwa kwe-valve yaseShayina ngokujulile, futhi sinikeze izixazululo ezithile, ngethemba lokuhlinzeka ngereferensi ethile kanye nosizo kubathengi be-valve baseShayina.