Industrial labala

Raba wachilengedwe amatha kupirira zowulutsa monga madzi abwino, madzi amchere, mpweya, mpweya, mpweya, alkali, ndi mchere; komabe, mafuta amchere ndi zosungunulira zopanda polar zidzawononga. Imachita bwino kwambiri pakutentha kotsika ndipo imakhala ndi kutentha kwanthawi yayitali kosapitilira 90 ° C. Imagwira ntchito pa -60 ° C. Gwiritsani ntchito chitsanzo pamwambapa.

Mafuta amafuta kuphatikiza mafuta amafuta, mafuta opaka mafuta, ndi mafuta amafuta amavomerezedwa parabala ya nitrile. Kutentha kwa ntchito kwa nthawi yayitali ndi 120 ° C, 150 ° C mu mafuta otentha, ndi -10 ° C mpaka -20 ° C pa kutentha kochepa.

Madzi a m'nyanja, ma acid ofooka, ma alkali ofooka, mayankho amchere, okosijeni wabwino kwambiri komanso kukana kukalamba kwa ozoni, kukana kwamafuta komwe kuli kotsika kuposa mphira wa nitrile koma kuposa mphira wina wamba, kutentha kwanthawi yayitali komwe kumakhala kotsika kuposa 90 ° C, kutentha kwambiri komwe kumagwiritsidwa ntchito. sali pamwamba pa 130 °C, ndipo kutentha kwapakati komwe kuli pakati pa -30 ndi 50 °C kuli koyenera mphira wa chloroprene.

Fluorine rabara imabweram'njira zosiyanasiyana, zonse zili ndi asidi wabwino, okosijeni, mafuta, ndi kukana zosungunulira. Kutentha kwanthawi yayitali ndikotsika kuposa 200 ° C, ndipo kumatha kugwiritsidwa ntchito ndi ma media onse a asidi komanso mafuta ndi zosungunulira.

Chipepala cha rabala chimagwiritsidwa ntchito kwambiri ngati chopangira mapaipi kapena kugwetsa mabowo ndi mabowo am'manja nthawi zambiri, ndipo kupanikizika sikuposa 1.568MPa. Ma gaskets a mphira ndi ofewa kwambiri komanso ogwirizana kwambiri pakati pa mitundu yonse ya gaskets, ndipo amatha kutulutsa chisindikizo ndi mphamvu yolimbikitsira pang'ono. Chifukwa cha makulidwe ake kapena kuuma kwake, gasket imatuluka mosavuta ikapanikizika mkati.

Ma sheet amphira amagwiritsidwa ntchito mu zosungunulira za organic monga benzene, ketone, ether, ndi zina zotere zomwe zingapangitse kuti chisindikizo chilephereke chifukwa cha kutupa, kukula, kufewa, komanso kukakamira. Nthawi zambiri, sizingagwiritsidwe ntchito ngati kuchuluka kwa kutupa kuli kwakukulu kuposa 30%.

Mapadi a mphira ndiabwino m'malo opanda vacuum komanso otsika kwambiri (makamaka pansi pa 0.6MPa). mphira ndi wandiweyani ndipo mpweya permetable pang'ono. Kwa zotengera za vacuum, mwachitsanzo, rabara ya fluorine imagwira ntchito bwino ngati chosindikizira chifukwa mulingo wa vacuum ukhoza kukwera mpaka 1.310-7Pa. Pad mphira iyenera kuphikidwa ndikupopedwa musanagwiritse ntchito mumtundu wa vacuum wa 10-1 mpaka 10-7Pa.

Mapepala a Rubber wa Asibesitosi

Ngakhale rabura ndi mafayilo osiyanasiyana adawonjezeredwa ku malowa a garket, vuto lalikulu ndikuti sakanasindikiza ma pores ang'onoang'ono omwe alipo, ndipo mtengo wake ndi wocheperako yosavuta kugwiritsa ntchito. Choncho, ngakhale kupanikizika ndi kutentha sikuli kochuluka, sikungagwiritsidwe ntchito pazinthu zowonongeka kwambiri. Chifukwa cha carbonization ya mphira ndi fillers pamene ntchito zina mkulu-kutentha sing'anga mafuta sing'anga, kawirikawiri pafupi mapeto a ntchito, mphamvu imachepa, zinthu amakhala lotayirira, ndi malowedwe kumachitika pa mawonekedwe ndi mkati gasket, kutsogolera coking ndi Kuwotcha.Kuonjezera apo, pa kutentha kwakukulu, pepala la mphira la asbestosi limamatira mosavuta pamtunda wosindikizira wa flange, womwe umasokoneza njira yosinthira gasket.

Kusungidwa kwamphamvu kwa zinthu za gasket kumatsimikizira kupanikizika kwa gasket muzofalitsa zosiyanasiyana pamoto. Zida zomwe zili ndi ulusi wa asibesitosi zimakhala ndi madzi a crystallization komanso madzi adsorption. Pa 500 ° C, madzi a crystallization amayamba kugwa, ndipo mphamvu imakhala yochepa. Pa 110 ° C, magawo awiri mwa magawo atatu a madzi adsorbed pakati pa ulusi watsika, ndipo mphamvu ya fiber yatsika ndi pafupifupi 10%. Pa 368 ° C, madzi onse adsorbed adatsika, ndipo mphamvu ya fiber yatsika ndi pafupifupi 20%.

Mphamvu ya mphira wa asibesitosi imakhudzidwa kwambiri ndi sing'anga komanso. Mwachitsanzo, mphamvu yopingasa yopingasa ya mphira ya asbestosi yosagwira mafuta 400 imasiyanasiyana pakati pa mafuta opaka mafuta oyendetsa ndege ndi mafuta oyendetsa ndege ndi 80%, zomwe ndichifukwa choti kutupa kwa mphira papepala ndi mafuta oyendetsa ndege ndikowopsa kuposa ndege. mafuta ophikira. Poganizira zomwe tatchulazi, kutentha kwa ntchito yotetezeka komanso kuthamanga kwapakati pa pepala la asbestosi labala XB450 ndi 250 °C mpaka 300 °C ndi 3 3.5 MPa; kutentha kwakukulu kwa pepala la mphira la asbestosi la No. 400 ndi 350 °C.

Ma chloride ndi ayoni a sulfure amapezeka papepala la rabala la asbestosi. Metal flanges amatha kupanga batire yowononga msanga pambuyo poyamwa madzi. Makamaka, pepala la labala la asbestosi losamva mafuta limakhala ndi sulfure yomwe imakhala yokwera kangapo kuposa labala wamba waasibesito, zomwe zimapangitsa kuti zikhale zosayenera kugwiritsidwa ntchito pazinthu zopanda mafuta. Muzofalitsa zamafuta ndi zosungunulira, gasket imatupa, koma mpaka pomwe, ilibe mphamvu pakusindikiza. Mwachitsanzo, kuyesa kumiza kwa maola 24 mu mafuta oyendetsa ndege pa kutentha kwa chipinda kumachitidwa pa pepala la mphira la asbestosi la 400 lopanda mafuta, ndipo likulamulidwa kuti kuwonjezeka kwa kulemera chifukwa cha kuyamwa kwa mafuta sikuyenera kupitirira 15%.