Irabha yemvelo ingamelana nezinto ezisetshenziswayo okuhlanganisa amanzi ahlanzekile, amanzi anosawoti, umoya, igesi engasebenzi, ama-alkali, kanye nezixazululo zikasawoti; noma kunjalo, uwoyela wamaminerali kanye nezinyibilikisi ezingezona ezi-polar zizoyilimaza. Isebenza kahle kakhulu emazingeni okushisa aphansi futhi inokushisa okusetshenziswa isikhathi eside okungadluli ku-90°C. Isebenza kahle ku--60°C. Sebenzisa isibonelo esingenhla.
Amakhemikhali kaphethiloli afaka phakathi uwoyela kaphethiloli, uwoyela wokugcoba, kanye nophethiloli ayamukeleka ngerabha ye-nitrile. Izinga lokushisa lokusetshenziswa isikhathi eside lingu-120°C, 150°C ku-oyela oshisayo, kanye no--10°C kuya ku--20°C emazingeni okushisa aphansi.
Amanzi olwandle, ama-asidi abuthakathaka, ama-alkali abuthakathaka, izixazululo zikasawoti, ukumelana okuhle kakhulu kokuguga kwe-oxygen ne-ozone, ukumelana kawoyela okungaphansi kwerabha ye-nitrile kodwa okungcono kunezinye irabha ezijwayelekile, amazinga okushisa okusetshenziswa isikhathi eside angaphansi kuka-90 °C, amazinga okushisa aphezulu okusetshenziswa angaphansi kuka-130 °C, kanye namazinga okushisa aphansi aphakathi kuka--30 no-50 °C konke kufanelekile erabha ye-chloroprene.
Irabha ye-fluorine iyezangezindlela ezahlukene, zonke ezinokumelana okuhle kwe-asidi, i-oxidation, uwoyela, kanye ne-solvent. Izinga lokushisa lokusetshenziswa isikhathi eside lingaphansi kuka-200°C, futhi lingasetshenziswa cishe nazo zonke izinhlobo ze-asidi kanye namafutha athile kanye ne-solvents.
Ishidi lerabha lisetshenziswa kakhulu njenge-flange gasket yamapayipi noma imigodi evame ukudilizwa kanye nemigodi yesandla, futhi ingcindezi ayidluli ku-1.568MPa. Ama-gasket erabha athambile kakhulu futhi angcono kakhulu ekubopheni phakathi kwazo zonke izinhlobo zama-gasket, futhi angakhiqiza umphumela wokuvala ngamandla amancane okuqinisa. Ngenxa yobukhulu bawo noma ubulukhuni obubi, i-gasket icindezelwa kalula uma ingaphansi kwengcindezi yangaphakathi.
Amashidi erabha asetshenziswa ezincibilikisini eziphilayo ezifana ne-benzene, i-ketone, i-ether, njll. ezingase zibangele ukwehluleka kokuvala ngenxa yokuvuvukala, ukukhula kwesisindo, ukuthamba, kanye nokunamathela. Ngokuvamile, azikwazi ukusetshenziswa uma izinga lokuvuvukala lingaphezu kuka-30%.
Ama-rubber pad angcono kakhulu ezimweni ze-vacuum kanye nengcindezi ephansi (ikakhulukazi ngaphansi kwe-0.6MPa). Into yerabha iminyene futhi umoya ungangena kancane. Ezitsheni ze-vacuum, isibonelo, irabha ye-fluorine isebenza kahle njenge-gasket yokuvala ngoba izinga le-vacuum lingafinyelela ku-1.310-7Pa. I-raber pad kumele ibhakwe futhi ipompe ngaphambi kokusetshenziswa ebangeni le-vacuum eliphakathi kuka-10-1 kuya ku-10-7Pa.
Nakuba irabha kanye nezitsha zokugcwalisa ezahlukahlukene zengezwe ezintweni ze-gasket, inkinga enkulu ukuthi ayikakwazi ukuvala ngokuphelele izimbobo ezincane ezikhona, futhi kunezinga elincane lokungena yize intengo ingaphansi kwamanye ama-gasket futhi kulula ukuyisebenzisa. Ngakho-ke, noma ngabe ingcindezi kanye nokushisa kungaphezu kwamandla, akukwazi ukusetshenziswa ezindaweni ezingcolisa kakhulu. Ngenxa yokufakwa kwerabha kanye nezitsha zokugcwalisa uma kusetshenziswa kwenye indawo yamafutha okushisa okuphezulu, ngokuvamile ngasekupheleni kokusetshenziswa, amandla ayancipha, izinto ziyakhululeka, futhi ukungena kwenzeka endaweni engaphakathi kwe-gasket, okuholela ekushiseni nasekubhemeni. Ngaphezu kwalokho, emazingeni okushisa aphezulu, ishidi lerabha le-asbestos linamathela kalula endaweni yokuvala i-flange, okwenza kube nzima inqubo yokufaka i-gasket esikhundleni sayo.
Ukugcinwa kwamandla kwezinto ze-gasket kunquma ingcindezi ye-gasket ezindaweni ezahlukahlukene lapho ishisa. Izinto eziqukethe imicu ye-asbestos ziqukethe amanzi okukhanyisa kanye namanzi okufaka amanzi. Ngaphezulu kuka-500°C, amanzi okukhanyisa aqala ukugoba, futhi amandla aphansi. Ku-110°C, izingxenye ezimbili kwezintathu zamanzi afakwe emanzini phakathi kwemicu zigoba, futhi amandla okudonsa e-fiber anciphe cishe ngo-10%. Ku-368°C, wonke amanzi afakwe emanzini agoba, futhi amandla okudonsa e-fiber anciphe cishe ngo-20%.
Amandla eshidi lerabha le-asbestos athonywa kakhulu yi-medium. Isibonelo, amandla okuthambekela ajikelezayo eshidi lerabha le-asbestos elingamelana namafutha le-No. 400 ayahlukahluka phakathi kwamafutha okugcoba ezindiza kanye nophethiloli wezindiza ngo-80%, okubangelwa ukuthi ukuvuvukala kwerabha eshidini yiphethiloli yezindiza kukhulu kakhulu kunokwamafutha okugcoba ezindiza. Ngokubheka lokho okucatshangelwe ngenhla, izinga lokushisa lokusebenza eliphephile kanye nezinga lokucindezela leshidi lerabha le-asbestos lasekhaya i-XB450 lingama-250 °C kuya ku-300 °C kanye nama-3 3.5 MPa; izinga lokushisa eliphakeme kakhulu leshidi lerabha le-asbestos elingamelana namafutha le-No. 400 lingama-350 °C.
Ama-ion e-chloride ne-sulfur akhona ephepheni lerabha le-asbestos. Ama-flange ensimbi angakha ngokushesha ibhethri lokugqwala ngemva kokumunca amanzi. Ikakhulukazi, ishidi lerabha le-asbestos elingamelana namafutha linokuqukethwe kwe-sulfur okuphindwe kaningana kuneshidi lerabha le-asbestos elivamile, okwenza lingafaneleki ukusetshenziswa ezindaweni ezingezona ezoyela. Emaphepheni kawoyela ne-solvent, i-gasket izovuvukala, kodwa kuze kube seqophelweni elithile, empeleni ayinawo umthelela ekhonweni lokuvala. Isibonelo, ukuhlolwa kokucwiliswa kwamahora angu-24 kuphethiloli wendiza ekushiseni kwegumbi kwenziwa ephepheni lerabha le-asbestos elingamelana namafutha elingu-No. 400, futhi kuyalelwe ukuthi ukwanda kwesisindo okubangelwa ukumuncwa kwamafutha akufanele kube ngaphezu kuka-15%.
Isikhathi sokuthunyelwe: Ephreli-20-2023
