Li-valve ke lisebelisoa tsa lipeipi tse sebelisetsoang ho bula le ho koala liphaephe, ho laola ho phalla, ho lokisa le ho laola liparamente (mocheso, khatello le phallo) ea mochine o tsamaisang thepa. Ho ea ka mosebetsi oa eona, e ka aroloa ka valve ea ho koala, valve ea ho hlahloba, valve e laolang, joalo-joalo.

Valve ke karolo ea taolo tsamaisong ea ho tsamaisa mokelikeli, e nang le mesebetsi ea ho khaola, ho laola, ho kheloha, ho thibela ho khutlela morao, ho tsitsisa, ho kheloha kapa ho phalla, le khatello ea khatello. Li-valve tse sebelisoang mekhoeng ea ho laola metsi, ho tloha ho li-valve tse bonolo ka ho fetisisa tse koalang ho ea ho li-valve tse rarahaneng ka ho fetisisa tse sebelisoang mekhoeng ea ho laola ka mokhoa o itekanetseng, li na le mefuta e mengata e fapaneng le litlhaloso.

Li-valve li ka sebelisoa ho laola phallo ea mefuta e fapaneng ea maro a kang moea, metsi, mouoane, mecha ea litaba e senyang, seretse, oli, tšepe ea metsi le mecha ea litaba ea radioactive. Li-valve li boetse li arotsoe ka li-valve tsa tšepe tse entsoeng ka tšepe, li-valve tsa tšepe tse entsoeng ka tšepe, li-valve tsa tšepe tse sa hloekang, li-valve tsa tšepe tsa chromium-molybdenum, li-valve tsa tšepe tsa chromium-molybdenum vanadium, li-valve tsa tšepe tse duplex, li-valve tsa polasetiki, li-valve tse sa tloaelehang, joalo-joalo ho ea ka thepa ea tsona.