I-fluorine-lineduvemvane valveluhlobo lwe-valve yolwelwesi oluvame ukusetshenziswa ku-asidi ne-alkali nezinye imidiya ezonakalisayo.Isetshenziswe kabanzi ku-petroleum, amakhemikhali, imithi, i-metallurgy, amandla kagesi nezinye izimboni.Ngenxa yobunkimbinkimbi bezimpawu zayo zesakhiwo kanye nobunkimbinkimbi bezinto zokwenziwa kolwelwesi Ukuhlukahluka, ngokuvamile abasebenzisi abazi ukuthi bangaqala kanjani ukukhetha, lesi sihloko sizokwethula indlela yokukhetha i-valve uvemvane ene-fluorine.
1. I-valve uvemvane ene-fluorine ungqimba lwepulasitiki olusongwe ebusweni bensimbi ecijile noma umzimba we-valve yensimbi engagqwali kanye neqembu lamavalvu ediski elixhumene noketshezi.Inhloso yokugqwala.Njengoba ipulasitiki ixhumene ne-medium, ubulukhuni bayo abumpofu, futhi okuphakathi okusetshenzisiwe akufanele kube nezinhlayiya eziqinile, amakristalu, ukungcola, njll., ukuze kuvimbele i-valve ukuthi ingagqoki i-valve core, ungqimba olune-fluorine. yesihlalo se-valve noma ungqimba lwe-fluorine ngesikhathi sokuvulwa nokuvalwa kwe-valve.I-fluorine iyancipha.Okwemaphakathi okunezinhlayiya eziqinile, amakristalu nokungcola, lapho kukhethwa, umgogodla we-valve nesihlalo se-valve singakhethwa kuma-alloys amelana nokugqwala, njenge-INCONEL, MONEL, Hastelloy, njll.
2. Izinga lokushisa elisetshenziswa i-valve uvemvane eline-fluorine: ipulasitiki ye-fluorine esetshenziswa yi-F46 (FEP), futhi izinga lokushisa elisetshenziswayo alikwazi ukudlula ku-150°C (izinga lokushisa le-medium lingafinyelela ku-150°C isikhathi esifushane, futhi izinga lokushisa kufanele lilawulwe ngaphakathi kwe-120 ° C isikhathi eside) Uma kungenjalo, uhlaka lwe-F46 lwezingxenye ze-valve kulula ukuthamba nokukhubazeka, okubangela ukuthi i-valve ivale ngokungenakufa nokuvuza okukhulu.Uma izinga lokushisa elisetshenziswayo lingaphansi kuka-180 ℃ isikhathi esifushane futhi lingaphansi kuka-150 ℃ isikhathi eside, enye i-fluoroplastic ingasetshenziswa.
-PFA, kodwa i-PFA ehlanganiswe ne-fluoroplastics ibiza kakhulu kune-F46 elayishiwe.
3. Umehluko wengcindezi nokucindezela kufanele ulawulwe ngaphakathi kwebanga elivumelekile.Uma umehluko wengcindezi nokucindezela kukhulu kakhulu, kulula ukubangela ukulimala kophawu ngesikhathi sokuvulwa nokuvalwa kwe-valve, okuzothinta ukusebenza kokuvala kwe-valve.
4. Izitayela eziningi zemidiya edlayo yezimboni ngokuvamile akuzona nje uhlobo olulodwa lwe-asidi, i-alkali, nosawoti.Lokhu kwenza kube nzima ukukhetha ulayini olufanele, oludinga ukukhethwa okuphelele kwamapharamitha njengesilinganiso sokwakheka koketshezi, ukugxilisa ingqondo, izinga lokushisa eliphakathi nendawo, usayizi wezinhlayiyana, nezinga lokugeleza kwendawo ephakathi.
5. Ivalve yevemvane ene-fluorine kufanele ikhethwe ngendlela efanele ngokwezinga lokugeleza elidingekayo (inani le-Cv).Inani le-CV levalve uvemvane eline-fluorine lincanyana kunalelo levalve uvemvane oluyisicwecwana esivamile kanye nevalve uvemvane oluyi-flange.Lapho ukhetha, ububanzi kanye nedigri yokuvula ye-valve butterfly ene-fluorine kufanele ibalwe ngokwezinga lokugeleza elidingekayo (inani le-Cv) kanye neminye imingcele yezobuchwepheshe.Uma ububanzi be-valve bukhethwa bukhulu kakhulu, nakanjani kuzokwenza i-valve ivule isikhathi eside.Ukusebenza ngaphansi kwezimo ezincane, okuhambisana nokucindezela kwe-medium, kuzobangela kalula ukuthi i-valve core kanye ne-rod ukuthi ithinteke okuphakathi ukuze kubangele ukuthi i-valve idlidlize.I-valve core rod izophulwa ngisho nangaphansi komthelela we-medium isikhathi eside.Lapho ukhetha izinhlobo ezihlukahlukene zama-valve ane-fluorine-lined, abasebenzisi kufanele baqonde futhi babambe izimo zobuchwepheshe zokusetshenziswa ngangokunokwenzeka, ukuze zikhethwe futhi zisetshenziswe kahle, futhi impilo yesevisi ye-valve ingathuthukiswa.Uma kwenzeka kudlula ububanzi bezimo zobuchwepheshe ezizosetshenziswa, kufanele kuphakanyiswe kumkhiqizi, kuxoxiswene ngakho, futhi kwamukelwe izinyathelo ezihambisanayo zokuyixazulula.6. Gwema ukucindezela okubi.I-valve ene-fluorine kufanele igweme ukusetshenziswa kokucindezela okungalungile epayipini.Uma kunomfutho ongemuhle, ungqimba olufakwe i-fluorine emgodini ongaphakathi wevalvu luzomuncwa (bulged) futhi lufakwe igobolondo, okuzokwenza ukuthi i-valve ivuleke futhi ivale ukungasebenzi kahle.