I-valve yokulinganisa uphethiloli iyithuluzi elibalulekile elisetshenziselwa ukulawula ukugeleza kukaphethiloli. Ivamise ukusetshenziswa ezinhlelweni zikaphethiloli wezimoto noma ezinhlelweni zokusabalalisa uphethiloli emikhakheni yezimboni ukuze kuqinisekiswe ukukalwa okunembile nokulawula uphethiloli.

Isimiso sokusebenza se-valve yokulinganisa uphethiloli sisekelwe ezimisweni ze-fluid mechanics kanye nobuchwepheshe bokulawula ama-valve. Ngokuvamile iqukethe i-valve kanye nedivayisi yokulawula. I-valve iqukethe i-bore eguquguqukayo kanye nendlela yokuvula nokuvala ehlehliswayo ukuze ulawule ukuhamba kukaphethiloli.

Lapho i-valve yokulinganisa uphethiloli isebenza, uphethiloli ungena ngaphakathi kwe-valve ngepayipi lokunikezela. Ngokulungisa i-valve bore, ukugeleza kukaphethiloli kungalawulwa ngokunembile. Idivayisi yokulawula ilungisa ukuvulwa kwe-valve ngokwezidingo zesistimu kanye nemingcele enikeziwe ukuze kuqinisekiswe ukulinganisa uphethiloli okunembile. Lapho ukunikezwa kwamafutha kudinga ukumiswa, idivayisi yokulawula izovala ngokuphelele i-valve futhi ivimbele ukuhamba kukaphethiloli.

Isimiso sokusebenza se-valve yokulinganisa uphethiloli singalawula izinga lokugeleza kukaphethiloli ngokushintsha indawo yokuvula i-valve. Ibhobo elikhudlwana libangela ukuba uphethiloli owengeziwe udlule ku-valve, kuyilapho ibhobo elincane livimbela ukugeleza kukaphethiloli. Leli khono lokulawula ngokunembile ukugeleza kukaphethiloli lenza ama-valve okulinganisa uphethiloli abe ingxenye ebalulekile ezinhlelweni zokusabalalisa uphethiloli.

Ukuqinisekisa ukunemba nokuthembeka kwamavalvu emitha kaphethiloli, amanye ama-valve metering kaphethiloli nawo afakwe izinzwa nezindlela zokuphendula. Izinzwa zithwebula idatha yesikhathi sangempela ekugelezeni kukaphethiloli futhi ziyidlulisele kuyunithi yokulawula. Idivayisi yokulawula iqhathaniswa namapharamitha anikeziwe futhi ilungiswa ngokusekelwe kudatha yesikhathi sangempela ukuze kugcinwe isilinganiso esinembile sikaphethiloli.

Ngamafuphi, i-valve yokulinganisa uphethiloli iyithuluzi elisekelwe ezimisweni ze-fluid mechanics kanye nobuchwepheshe bokulawula ama-valve, esetshenziselwa ukulawula ngokunembile ukugeleza nokubala kukaphethiloli. Umgomo wayo wokusebenza usekelweukushintsha kwe-diameter ye-valve, futhi ifinyelela ukulawula okunembayo nokuthembekile ngokusebenzisalawula amadivayisi nezinzwa. Ama-valve okulinganisa uphethiloli adlala indima ebalulekile ezinhlelweni zikaphethiloli wezimoto nasezindaweni zezimboni ukuze kuqinisekiswe ukutholakala okunembile kanye nokulinganisa uphethiloli.