Ngokusho kwempahla engaphezulu yokuvala,ama-valve esangozingahlukaniswa zibe izinhlobo ezimbili: uphawu oluqinile kanye uphawu oluthambile.Uyini umehluko phakathi kwe-valve yophawu oluthambile kanye ne-valve yophawu oluqinile:
I-valve yesango eliqinile: Izinto zokuvala kuzo zombili izindawo zokuvala ziyinsimbi, ebizwa ngokuthi “uphawu oluqinile”.Ukumelana nokushisa okuphezulu, ukumelana nokugqoka, izakhiwo ezinhle zemishini ezifana: insimbi + insimbi;insimbi + yethusi;insimbi
+ Graphite;insimbi + i-alloy steel.Izinto zokuvala ezivame ukusetshenziswa yilezi: 13Cr insimbi engagqwali, izinto eziqinile ezibheke kanzima, i-tungsten carbide efuthwe, njll. Indawo yokuvala ayivalwanga kahle uma kuqhathaniswa.
I-valve yesango lophawu oluthambile: ipheya yophawu yenziwe ngezinto zensimbi ngakolunye uhlangothi kanye nezinto ezinwebekayo ezingezona ezensimbi ngakolunye uhlangothi, okubizwa ngokuthi “uphawu oluthambile”.Ukusebenza kokubekwa uphawu kwalolu hlobo lwesigxivizo kuhle, kodwa akumelani nokushisa okuphezulu, ukugqoka kulula, futhi kunezakhiwo ezimbi zemishini.Okufana: insimbi + irabha;insimbi + PTFE, njll. Kusho ukuthi uhlangothi olulodwa lwepheya yophawu lwenziwe ngezinto ezinobunzima obuphansi kakhulu.Ngokuvamile, isihlalo sophawu oluthambile senziwe ngezinto ezingezona ezensimbi ezinamandla athile, ubulukhuni nokumelana nezinga lokushisa.Inokusebenza okuhle kokuvala futhi ingafinyelela ukuvuza okungu-zero, kodwa inempilo ende.Uma kuqhathaniswa nokungaguquguquki kahle kwezinga lokushisa, uphawu oluqinile lwenziwe ngensimbi, futhi ukusebenza kokuvala kubi kakhulu, nakuba abanye abakhiqizi bethi kungafinyelela ukuvuza okungu-zero.Inhloso yokusungulwa kwe-valve yesango lokuvala elithambile: ukuxazulula inkinga yesihlalo se-valve kanye nendawo yokuvala yepuleti le-valve eligqwalile noma likhubazekile, ipuleti le-valve lingakwazi ukunxephezela ngokuzenzakalela ikhava eqinile yokucindezela kanye nebhalansi ye-othomathikhi yokucindezela i-valve yesango lokuvala elithambile, futhi uxazulule inkinga yezinto ezithambile zokuvala ezilinyazwa ukungqubuzana Inkinga yendawo yokuvala, ngoba umkhono wokuvala we-valve wesango ungashintshwa, ukwandisa kakhulu ukusetshenziswa kwe-valve.
Uhla olusebenzayo lwe-valve yesango lophawu oluthambile: ububanzi (p50-p400mm, ingcindezi engu-2.5-4.0MPa, uketshezi oluhlukahlukene lokushisa olujwayelekile olungaphansi kuka-200 ℃).
Uphawu oluthambile alukwazi ukuhlangabezana nezidingo zenqubo yezinto ezithile ezigqwalayo, futhi uphawu oluqinile lungaluxazulula!
Lezi zinhlobo ezimbili zezimpawu zingaphelelisana.Mayelana nokuqina, uphawu oluthambile luhle kakhulu, kodwa manje ukuqina kwesigxivizo esiqinile nakho kungahlangabezana nezidingo ezihambisanayo!Inzuzo yophawu oluthambile ukusebenza kahle kokuvala, kodwa okubi ukuthi kulula ukuguga, ukugqoka, futhi inokuphila okufushane kwenkonzo.Isigxivizo esiqinile sinempilo ende yesevisi, kodwa ukuqina kubi kakhulu kunophawu oluthambile.