Umsebenzi we-valve yokulawula uwoyela wezimoto ukulungisa umfutho kawoyela futhi uvimbele umfutho kawoyela wephampu kawoyela ekubeni uphezulu kakhulu. Ngesikhathi sejubane eliphezulu, ukunikezwa kwamafutha ephampu yamafutha ngokusobala kukhulu, futhi ukucindezela kwamafutha nakho kuphezulu kakhulu, ngalesi sikhathi, kuyadingeka ukungenelela ekulungiseni. Amafutha avuthayo azokwenza ukuthi amafutha avuthayo abangele ukuthi inzwa ye-oxygen yemoto yonakaliswe ngokushesha kakhulu; Uwoyela ovuthayo uzoholela ekwandeni kokusetshenziswa kukaphethiloli, ukukhishwa kwegesi ngokweqile, isivinini esingazinzile sokungenzi lutho, kuthuthukise izingozi ezifihliwe zemoto, futhi kwandise umthwalo wezomnotho. Uwoyela ovuthayo uzoholela ekwandeni kwekhabhoni eqoqweni lomlilo wenjini, ukusheshisa okubuthakathaka, isivinini esincane, ukuntuleka kwamandla neminye imiphumela emibi.
