Ngokuya ngomsebenzi olula kakhulu wokusika, umsebenzi wokubopha we-valve emishini ukuvikela okuphakathi kokuphuma noma ukuvimba izinto zangaphandle kusuka ekuhlanganiseni phakathi kwezingxenye lapho i-valve itholakala khona . I-collar nezakhi ezidlalwa yiqhaza lokuvalwa kwalo zibizwa ngokuthi izikhala noma izakhiwo zokubopha uphawu, ezibizwa ngokuthi izikhala ezifushane. Izindawo ezithintana nazo zithintana nezimpawu futhi zidlale indima yokubekwa uphawu zibizwa ngokuthi izindawo zokubopha uphawu.

Indawo ebekelwe uphawu le-valve iyingxenye ebaluleke kakhulu ye-valve, kanti amafomu awovuvu avuzayo ahlukaniswe ngalezi zinhlobo, okungukuthi, ukuvuza kobuso bendawo yokubopha, ukuvuza kwengxenye yokubopha uphawu okuwela kuvaliwe kanye nokuvuza kwezindaba zakwamanye amazwe ezishumeke phakathi kwezindawo zokubopha uphawu. Enye yama-valves asetshenziswa kakhulu epayipini nakwimishini ukunqamula ukuhamba kwe-medium. Ngakho-ke, ukuqina kwalo yinto eyinhloko ukuthola ukuthi ukuvuza kwangaphakathi kwenzeka. Indawo ebopha uphawu lwe-valve ivame ukwakhiwa ngababili bokubopha uphawu, eyodwa emzimbeni we-valve kanti enye kwi-valve disc