Ukuvala i-valve yebhola kukhiya amapayipi amaningi ahlukene ngokubamba isibambo sisenze IVALIWE.Idivayisi yethu encane yokukhiya i-valve yebhola izokhiya ububanzi bepayipi ukusuka ku-1/2′ ukuya ku-3′.Isikhiya sethu esikhulu sokuphepha se-valve yebhola sivala ububanzi bepayipi ukusuka ku-2′ ukuya ku-8′.Izinto zemishini nazo ziyahlukahluka ngokuya ngesicelo.Kukhona nensimbi ejwayelekile yokukhiya ivalvu yebhola, kodwa ingakhiywa kuphela.