Vavu yathu ya ZFA ili ndi mawonekedwe osiyanasiyana amtundu wamagulugufe amtundu wa lug kwa makasitomala athu komanso amatha kusintha makonda.Pakuti lug mtundu valavu thupi zakuthupi, tikhoza kukhala CI, DI, chitsulo chosapanga dzimbiri, WCB, mkuwa ndi etc.Wndi pin ndipini pang'ono valavu ya butterfly.Tvalavu yagulugufe yamtundu wa lug imatha kukhala lever, giya ya nyongolotsi, woyendetsa magetsi ndi pneumatic actuator.