Rubber na halitta zai iya jure wa kafofin watsa labarai ciki har da ruwa mai tsabta, ruwan gishiri, iska, iskar gas, alkalis, da mafita na gishiri;duk da haka, man ma'adinai da sauran abubuwan da ba na polar ba za su lalata shi.Yana aiki na musamman da kyau a ƙananan zafin jiki kuma yana da zafin amfani na dogon lokaci wanda bai wuce 90 ° C ba.Yana aiki a -60 ° C.Yi amfani da misalin da ke sama.
Abubuwan da suka hada da man fetur da suka hada da man fetur, man mai, da man fetur ana yarda da su ga roba na nitrile.Yanayin zafin jiki don amfani na dogon lokaci shine 120 ° C, 150 ° C a cikin mai mai zafi, da -10 ° C zuwa -20 ° C a ƙananan zafin jiki.
Ruwan teku, raunin acid, raunin alkalis, mafitacin gishiri, kyakkyawan iskar oxygen da juriya tsufa na ozone, juriyar mai wanda yayi ƙasa da robar nitrile amma mafi kyau fiye da sauran roba na gabaɗaya, yanayin amfani na dogon lokaci wanda bai wuce 90 ° C, matsakaicin yanayin zafi wanda ke amfani da shi. ba su fi 130 ° C ba, kuma ƙananan zafin jiki da ke tsakanin -30 zuwa 50 ° C duk sun dace da roba na chloroprene.
Fluorine roba yana zuwaa cikin nau'i-nau'i iri-iri, duk suna da kyakkyawan acid, oxidation, mai, da juriya mai ƙarfi.Zazzabi na dogon lokaci da ake amfani da shi yana ƙasa da 200 ° C, kuma ana iya amfani dashi tare da kusan dukkanin kafofin watsa labarai na acid da wasu mai da kaushi.
Ana amfani da takardar roba mafi yawa azaman flange gasket don bututun bututu ko sau da yawa rugujewar magudanar ruwa da ramukan hannu, kuma matsin lamba bai wuce 1.568MPa ba.Gacets na roba sune mafi laushi kuma mafi kyau a haɗawa tsakanin kowane nau'in gaskets, kuma suna iya haifar da tasirin rufewa tare da ɗan ƙaramin ƙarfi na riga-kafi.Saboda kaurinsa ko rashin taurinsa, saboda haka ana matse shi cikin sauƙi a lokacin da yake cikin matsi.
Ana amfani da zanen gadon roba a cikin abubuwan kaushi na halitta kamar benzene, ketone, ether, da sauransu waɗanda zasu iya haifar da gazawar hatimi saboda kumburi, girman nauyi, laushi, da ɗanko.Gabaɗaya, ba za a iya amfani da shi ba idan matakin kumburi ya fi 30%.
Rubutun roba sun fi dacewa a cikin injin daɗaɗɗen yanayi (musamman ƙasa da 0.6MPa).Abun robar yana da yawa kuma yana iya jujjuyawar iska zuwa dan kadan.Alal misali, kwantena na ruwa, alal misali, roba na fluorine yana aiki mafi kyau a matsayin gasket ɗin rufewa tun lokacin da matakin injin zai iya kaiwa 1.310-7Pa.Dole ne a toya kushin roba kuma a yi famfo kafin amfani da shi a cikin kewayon 10-1 zuwa 10-7Pa.
Duk da cewa an saka roba da filaye iri-iri a cikin kayan, babban al’amarin shi ne, har yanzu ba zai iya rufe qananan guraren da ke wurin ba, kuma akwai ‘yar matakin shigar duk da cewa farashin bai kai na sauran gasket din ba kuma shi ne. sauki don amfani.Don haka, ko da matsi da zafin jiki ba su wuce kima ba, ba za a iya amfani da shi a cikin kafofin watsa labarai masu gurɓata sosai ba.Saboda carbonization na roba da fillers lokacin amfani a wasu high-zazzabi mai matsakaici, yawanci kusa da karshen amfani, da ƙarfi ne rage, da kayan zama sako-sako da, da shigar azzakari cikin farji ya faru a cikin dubawa da kuma a cikin gasket, kai ga coking da kuma smoke.Additionally, a high yanayin zafi, da asbestos roba takardar readily adheres zuwa flange sealing surface, wanda complicates aiwatar da maye gurbin da gasket.
Ƙarfin ƙarfi na kayan gasket yana ƙayyade matsa lamba na gasket a cikin kafofin watsa labaru daban-daban a cikin yanayin zafi.Kayayyakin da ke ɗauke da zaruruwan asbestos sun ƙunshi duka ruwan crystallization da ruwan adsorption.Sama da 500 ° C, ruwan crystallization yana fara hazo, kuma ƙarfin yana ƙasa.A 110 ° C, kashi biyu bisa uku na ruwan da aka datse tsakanin zaruruwa sun yi hazo, kuma ƙarfin ƙarfin fiber ɗin ya ragu da kusan 10%.A 368 ° C, duk ruwan da aka shayar da shi ya yi hazo, kuma ƙarfin ƙarfin fiber ɗin ya ragu da kusan 20%.
Ƙarfin takardar roba na asbestos yana tasiri sosai ta matsakaici kuma.Misali, karfin jujjuyawar roba mai lamba 400 mai juriya na roba na asbestos ya bambanta tsakanin man fetur na jirgin sama da kuma man jirgin sama da kashi 80%, wanda saboda kumburin roba a cikin takardar ta iskar gas ya fi na jirgin sama tsanani. man shafawa.Dangane da abubuwan da aka ambata, amintaccen zafin aiki da kewayon matsi don takaddar roba na asbestos na gida XB450 sune 250 ° C zuwa 300 ° C da 3 3.5 MPa;Matsakaicin zafin jiki na No. 400 mai jurewar asbestos rubber sheet shine 350 ° C.
Chloride da sulfur ions suna nan a cikin takardar roba na asbestos.Ƙarfe flanges na iya sauri gina baturi lalata bayan sha ruwa.Musamman ma, takardar roba mai juriyar mai tana da abun ciki na sulfur wanda ya ninka sau da yawa fiye da takardar roba na asbestos na yau da kullun, yana mai da bai dace da amfani da shi a cikin kafofin watsa labarai marasa mai ba.A cikin mai da sauran kafofin watsa labaru, gasket zai kumbura, amma har zuwa wani batu, da gaske ba shi da wani tasiri a kan ikon rufewa.Misali, ana yin gwajin nutsewar sa'o'i 24 a cikin man jirgin sama a zafin daki na No. 400 mai juriya na asbestos rubber, kuma an ba da izini cewa karuwar nauyin da ake samu sakamakon sha mai kada ya wuce 15%.
Lokacin aikawa: Afrilu-20-2023
