Irabha yendalo inokumelana nezinto ezisetyenziswa kwiindawo ezifana namanzi acocekileyo, amanzi anetyuwa, umoya, igesi engasebenziyo, i-alkalis, kunye nezisombululo zetyuwa; nangona kunjalo, ioyile yeminerali kunye nezinyibilikisi ezingezizo ze-polar ziya kuyonakalisa. Isebenza kakuhle kakhulu kumaqondo obushushu aphantsi kwaye inobushushu obungasetyenziswa ixesha elide obungadluli kwi-90°C. Isebenza kwi--60°C. Sebenzisa umzekelo ongentla.
Iikhompawundi zepetroleum eziquka ioyile yepetroli, ioyile yokuthambisa, kunye nepetroleum ziyamkeleka kwirabha ye-nitrile. Ubushushu obusetyenziswa ixesha elide yi-120°C, i-150°C kwioyile eshushu, kunye ne--10°C ukuya kwi--20°C kumaqondo obushushu aphantsi.
Amanzi olwandle, ii-asidi ezibuthathaka, ii-alkali ezibuthathaka, izisombululo zetyuwa, ukumelana okuhle kakhulu nokuguga kweoksijini kunye ne-ozone, ukumelana neoyile okungaphantsi kwerabha ye-nitrile kodwa okungcono kunezinye irabha eziqhelekileyo, amaqondo obushushu asetyenziswa ixesha elide angaphantsi kwama-90 °C, amaqondo obushushu aphezulu angaphantsi kwama-130 °C, kunye namaqondo obushushu aphantsi aphakathi kwama-30 nama-50 °C onke afanelekile kwirabha ye-chloroprene.
Irabha yefluorine izakwiintlobo ngeentlobo, zonke ezikwazi ukumelana ne-asidi, i-oxidation, ioyile, kunye ne-solvent. Ubushushu bokusetyenziswa ixesha elide bungaphantsi kwama-200°C, kwaye ingasetyenziswa phantse kuzo zonke iindawo ze-asidi kunye neeoyile kunye ne-solvents.
Iphepha lerabha lisetyenziswa kakhulu njenge-flange gasket yemibhobho okanye imingxuma yezandla echithwa rhoqo, kwaye uxinzelelo alukho ngaphezu kwe-1.568MPa. Ii-gasket zerabha zezona zithambileyo kwaye zibalaseleyo ekubopheni phakathi kwazo zonke iintlobo zee-gasket, kwaye zinokwenza isiphumo sokutywina ngamandla amancinci okuqinisa. Ngenxa yobukhulu bayo okanye ubunzima bayo obuphantsi, i-gasket icinezelwa lula xa iphantsi koxinzelelo lwangaphakathi.
Iisheyiti zerabha zisetyenziswa kwizinyibilikisi zendalo ezifana ne-benzene, i-ketone, i-ether, njl. ezinokubangela ukungasebenzi kwetywina ngenxa yokudumba, ukukhula kobunzima, ukuthamba, kunye nokunamathela. Ngokubanzi, ayinakusetyenziswa ukuba inqanaba lokudumba lingaphezulu kwe-30%.
Iiphedi zerabha zikhethwa kakhulu kwiimeko zomoya ongcolileyo kunye noxinzelelo oluphantsi (ingakumbi ngaphantsi kwe-0.6MPa). Into yerabha ixinene kwaye umoya ungangena kancinci. Kwiikhonteyina zomoya ongcolileyo, umzekelo, irabha ye-fluorine isebenza ngcono njenge-gasket yokutywina kuba inqanaba lomoya ongcolileyo linokufikelela kwi-1.310-7Pa. Iphedi yerabha kufuneka ibhakwe kwaye ipompe ngaphambi kokuba isetyenziswe kuluhlu lwe-vacuum oluphakathi kwe-10-1 ukuya kwi-10-7Pa.
Nangona irabha kunye nezinye izinto zokuzalisa zongezwe kwizinto ze-gasket, ingxaki enkulu kukuba ayinakuzivala ngokupheleleyo iimbobo ezincinci ezikhoyo, kwaye kukho inqanaba elincinci lokungena nangona ixabiso liphantsi kunezinye ii-gasket kwaye kulula ukuyisebenzisa. Ke ngoko, nokuba uxinzelelo kunye nobushushu azigqithisi, azinakusetyenziswa kwiindawo ezingcolisa kakhulu. Ngenxa yokwenziwa kwerabha kunye nezizalisi xa zisetyenziswa kwindawo ethile yeoyile enobushushu obuphezulu, ngokuqhelekileyo kufutshane nokuphela kokusetyenziswa, amandla ayancitshiswa, izinto ziyakhululeka, kwaye ukungena kwenzeka kwindawo ephakathi nangaphakathi kwe-gasket, okukhokelela ekutshiseni nasekutshayeni. Ukongeza, kumaqondo obushushu aphezulu, iphepha lerabha le-asbestos linamathela ngokulula kumphezulu wokutywina we-flange, okwenza kube nzima inkqubo yokutshintsha i-gasket.
Ukugcinwa kwamandla ezinto ze-gasket kumisela uxinzelelo lwe-gasket kwiindawo ezahlukeneyo xa ishushu. Izinto eziqulethe iifayibha ze-asbestos ziqulathe amanzi e-crystallization kunye namanzi e-adsorption. Ngaphezulu kwe-500°C, amanzi e-crystallization aqala ukuhla, kwaye amandla aphantsi. Kwi-110°C, isibini kwisithathu samanzi afakwe phakathi kweefayibha ahla, kwaye amandla e-tensile yefayibha ahla malunga ne-10%. Kwi-368°C, onke amanzi afakwe kwi-adsorbed ahla, kwaye amandla e-tensile yefayibha ahla malunga ne-20%.
Amandla ephepha lerabha le-asbestos achaphazeleka kakhulu yindlela yokusetyenziswa. Umzekelo, amandla okutsalwa anqamlezileyo ephepha lerabha le-asbestos elimelana neoyile yeNombolo 400 ayahluka phakathi kweoyile yokuthambisa yeenqwelo moya kunye namafutha eenqwelo moya nge-80%, oku kungenxa yokuba ukudumba kwerabha ephepheni yipetroli yeenqwelo moya kukhulu kunoko kweoyile yokuthambisa yeenqwelo moya. Ngokubhekiselele kwezi zinto zikhankanyiweyo apha ngasentla, ubushushu bokusebenza obukhuselekileyo kunye noluhlu loxinzelelo lwephepha lerabha le-asbestos lasekhaya i-XB450 liphakathi kwe-250 °C ukuya kwi-300 °C kunye ne-3 3.5 MPa; ubushushu obuphezulu bephepha lerabha le-asbestos elimelana neoyile yeNombolo 400 lingama-350 °C.
Ii-ion ze-chloride kunye ne-sulfur zikhona kwiphepha lerabha le-asbestos. Iiflange zesinyithi zinokwakha ibhetri yokubola ngokukhawuleza emva kokufunxa amanzi. Ingakumbi, iphepha lerabha le-asbestos elimelana neoyile linomxholo wesalfure ophindwe kaninzi kunephepha lerabha le-asbestos eliqhelekileyo, okwenza ukuba lingafaneleki ukusetyenziswa kwiindawo ezingezizo ioyile. Kwi-oyile kunye ne-solvent media, i-gasket iyadumba, kodwa ukuya kuthi ga kwinqanaba elithile, ayinampembelelo kubuchule bokuvala. Umzekelo, uvavanyo lokuntywiliselwa kwiiyure ezingama-24 kwipetroli yendiza kubushushu begumbi lwenziwa kwiphepha lerabha le-asbestos elimelana neoyile elinguNombolo 400, kwaye kuyalelwe ukuba ukunyuka kobunzima okubangelwa kukufunxwa kweoyile akufanele kube ngaphezu kwe-15%.
Ixesha lokuthumela: Epreli-20-2023
