Izinhlelo zokusebenza zomkhiqizo:

Amavalvu ochungechunge lwe-HDS amelela izakhiwo zeyunithi eziguquguqukayo ezingalungiselelwa ukwakha i-valve ngosayizi abahlukene abangu-8, uchungechunge, ukuhambisana, uchungechunge/ukuhambisana, ukwabelana ngokugeleza, noma ukulayishwa kwamasekhethi azwelayo.Ukwengeza, i-valve ihlanganisa izixhumanisi zokulawula ukugeleza kokungena nokuphakathi okungasetshenzwa ngesandla noma ngogesi ngokulinganayo.Isetshenziswa kakhulu emishinini yamahlathi, ukuphakamisa izimoto kanye nemishini kamasipala.