Iivalve zebhola zinokudityaniswa ne-actuator yomoya (iivalvu zebhola zepneumatic) okanye i-actuator yombane (iivalvu zebhola zombane) ukwenzela ukuzenzekelayo kunye/okanye ukulawula ukude.Kuxhomekeka kwisicelo, ukuzenzela nge-actuator yomoya ngokuchasene neyombane kunokuba luncedo ngakumbi, okanye ngokuphendukile.