Irabha yemvelo ingamelana nemidiya ehlanganisa amanzi ahlanzekile, amanzi anosawoti, umoya, igesi engasebenzi, i-alkali, nezixazululo zikasawoti; noma kunjalo, uwoyela wamaminerali kanye nezincibilikisi ezingezona ze-polar zizolimaza. Isebenza kahle kakhulu emazingeni okushisa aphansi futhi inezinga lokushisa lokusetshenziswa lesikhathi eside elingekho ngaphezu kuka-90°C. Isebenza ku -60 °C. Sebenzisa isibonelo esingenhla.
Izithako ze-petroleum ezihlanganisa uwoyela kaphethiloli, uwoyela wokugcoba, ne-petroleum ziyamukeleka ngenjoloba ye-nitrile. Izinga lokushisa elisetshenziswa isikhathi eside liyi-120°C, i-150°C emafutheni ashisayo, kanye no-10°C kuya ku-20°C emazingeni okushisa aphansi.
Amanzi olwandle, ama-asidi abuthakathaka, ama-alkali abuthakathaka, izixazululo zikasawoti, i-oxygen enhle kakhulu ne-ozone ukumelana nokuguga, ukumelana nowoyela okungaphansi kwerabha ye-nitrile kodwa engcono kunenye injoloba evamile, amazinga okushisa okusetshenziswa isikhathi eside angaphansi kuka-90 °C, izinga lokushisa eliphezulu lokusebenzisa lokho awekho ngaphezu kuka-130 °C, futhi amazinga okushisa aphansi aphakathi kuka -30 no-50 °C wonke alungele irabha ye-chloroprene.
Irabha ye-fluorine ifikangezindlela ezihlukahlukene, zonke ezine-asidi enhle, i-oxidation, uwoyela, nokumelana ne-solvent. Izinga lokushisa lokusetshenziswa kwesikhathi eside lingaphansi kuka-200°C, futhi lingasetshenziswa cishe nayo yonke imithombo ye-asidi kanye namafutha athile nezinyibilikisi.
Ishidi lenjoloba lisetshenziswa kakhulu njenge-gasket ye-flange yamapayipi noma imigodi evame ukudilizwa kanye nezimbobo zezandla, futhi ingcindezi ayinkulu kuno-1.568MPa. Ama-gasket enjoloba athambile futhi angcono kakhulu ekubopheni phakathi kwazo zonke izinhlobo zama-gaskets, futhi angaveza umphumela wokuvala ngamandla amancane nje okuqinisa ngaphambili. Ngenxa yobukhulu bayo noma ubulukhuni obumpofu, ngakho-ke i-gasket ikhishwa kalula uma ingaphansi kwengcindezi yangaphakathi.
Amashidi enjoloba asetshenziswa kuzincibilikisi zemvelo ezifana ne-benzene, i-ketone, i-ether, njll. ezingase zibangele ukwehluleka kwezinsimbi ngenxa yokuvuvukala, ukukhula kwesisindo, ukuthamba, nokunamathela. Ngokuvamile, ayikwazi ukusetshenziswa uma izinga lokuvuvukala likhulu kuno-30%.
Amaphedi enjoloba ayathandeka lapho kunevacuum kanye nezimo zengcindezi ephansi (ikakhulukazi ngaphansi kuka-0.6MPa). Into yenjoloba iminyene futhi umoya ungangena kancane. Ezitsheni zevacuum, isibonelo, irabha ye-fluorine isebenza kangcono njenge-gasket yokuvala njengoba izinga le-vacuum lingakhuphuka lifike ku-1.310-7Pa. Iphedi yenjoloba kufanele ibhakwe futhi iphonswe ngaphambi kokusetshenziswa ku-vacuum range ye-10-1 kuya ku-10-7Pa.
Nakuba irabha kanye nezigcwalisi ezihlukahlukene zengezwe ku-gasket material, inkinga enkulu ukuthi namanje ayikwazi ukuvala ngokuphelele ama-pores amancane akhona, futhi kunezinga elincane lokungena nakuba intengo ingaphansi kwamanye ama-gaskets futhi kulula ukuyisebenzisa. Ngakho-ke, ngisho noma ingcindezi kanye nezinga lokushisa lingeqile, angeke lisetshenziswe emithonjeni engcolisa kakhulu. Ngenxa ye-carbonization yenjoloba nama-fillers lapho isetshenziswa endaweni ethile kawoyela enezinga lokushisa eliphezulu, ngokuvamile eduze nokuphela kokusetshenziswa, amandla ayancipha, izinto ezibonakalayo ziyaxega, futhi ukungena kwenzeka esibonakalayo nangaphakathi kwe-gasket, okuholela ekuphekeni nasekuphekeni. umusi.Ukwengeza, emazingeni okushisa aphezulu, ishidi lerabha le-asbestos linamathela kalula endaweni yokuvala i-flange, okwenza kube nzima inqubo yokufaka i-gasket esikhundleni.
Ukugcinwa kwamandla kwezinto ze-gasket kunquma ukucindezela kwe-gasket emithonjeni ehlukahlukene esimweni esishisayo. Izinto eziqukethe imicu ye-asbestos ziqukethe kokubili amanzi acwebezelayo namanzi e-adsorption. Ngaphezulu kuka-500°C, amanzi e-crystallization aqala ukushona phansi, futhi amandla aphansi. Ku-110°C, izingxenye ezimbili kwezintathu zamanzi adsorbed phakathi kwamafayibha ziye zehla, futhi amandla e-fiber aqinile ehle cishe ngo-10%. Ku-368°C, wonke amanzi e-adsorbed ehlile, futhi amandla e-fiber aqinile ehle cishe ngo-20%.
Amandla eshidi lerabha le-asbestos athonywa kakhulu naphakathi nendawo. Isibonelo, amandla aguquguqukayo weshidi lerabha le-asbestos elimelana nowoyela elingunombolo 400 liyahlukahluka phakathi kukawoyela wokugcoba wendiza kanye nophethiloli wendiza ngo-80%, lokhu kungenxa yokuthi ukuvuvukala kwenjoloba eshidini ngophethiloli wendiza kubi kakhulu kunaleyo yendiza. amafutha okugcoba. Ngokucabangela lokhu okucatshangelwe ngenhla, izinga lokushisa eliphephile lokusebenza kanye nengcindezi yamabanga eshidi lerabha le-asbestos yasekhaya i-XB450 lingu-250 °C kuya ku-300 °C kanye no-3 3.5 MPa; izinga lokushisa eliphezulu leshidi lerabha le-asbestos elimelana nowoyela elingu-No. 400 ngu-350 °C.
I-chloride nama-ion sulphur akhona eshidini lerabha le-asbestos. Ama-Metal flange angakha ngokushesha ibhethri eligqwalile ngemva kokumunca amanzi. Ikakhulukazi, ishidi lerabha le-asbestos elimelana nowoyela linokuqukethwe kwesibabule okuphindwe izikhathi ezimbalwa kuneshidi lenjoloba le-asbestos elivamile, okulenza lingafaneleki ukusetshenziswa kumithombo yezindaba engeyona amafutha. Kuwoyela nemithombo ye-solvent, i-gasket izovuvukala, kodwa kuze kube seqophelweni, empeleni ayinawo umthelela emandleni okuvala. Isibonelo, ukuhlolwa kokucwiliswa kwamahora angu-24 kuphethiloli wendiza ekushiseni kwegumbi kwenziwa eshidini lerabha le-asbestos elingamelana nowoyela elingunombolo 400, futhi kuyagunyazwa ukuthi ukukhuphuka kwesisindo okubangelwa ukumuncwa kukawoyela akufanele kube ngaphezu kuka-15%.
Isikhathi sokuthumela: Apr-20-2023
