Amavalvu ebhola angahlanganiswa ne-actuator yomoya (amavalvu ebhola womoya) noma i-actuator kagesi (ama-valve amabhola kagesi) ukuze azishintshanise futhi/noma ukulawula ukude.Kuye ngohlelo lokusebenza, ukuzishintshanisa nge-actuator yomoya uma kuqhathaniswa nekagesi kungase kube usizo kakhulu, noma okuphambene nalokho.