Polytetrafluoroethylene(Teflon kana PTFE), inowanzozivikanwa se "mambo wepurasitiki", inhengo yepolymer yakagadzirwa netetrafluoroethylene nepolymerization, ine kugadzikana kwemakemikari yakanakisa, corrosion resistance, kuisa chisimbiso, high lubrication isiri-viscosity, magetsi ekudzivirira uye kutsungirira kwakanaka kwekudzivirira kukwegura.

PTFE iri nyore kutonhora kuyerera uye inokambaira pasi pekumanikidzwa uye tembiricha yakanyanya, saka inowanzoshandiswa kune yakaderera kudzvanywa, tembiricha yepakati, ngura yakasimba uye haibvumire kusvibiswa kwepakati, senge yakasimba acid, alkali, halogen, mushonga uye zvichingodaro. .Iyo yakachengeteka tembiricha yekushanda i150 ℃ uye kudzvanywa kuri pasi pe1MPa.Yakazadzwa PTFE simba ichawedzera, asi tembiricha yekushandisa haigone kudarika 200 ℃, zvikasadaro kuramba kwecorrosion kuchaderera.Iyo yakanyanya kushandiswa kumanikidza kwePTFE kurongedza kazhinji haina kupfuura 2MPa.

Nekuda kwekuwedzera kwekushisa, zvinhu zvinokambaira, zvichikonzera kuderera kukuru kwechisimbiso chisimbiso.Kunyange kana kutonhora kwakakodzera, nekuwedzera kwenguva, kudzvinyirira kwekusimbisa kwechisimbiso chepamusoro kuchaderera, zvichiita kuti "stress relaxation phenomenon".Chiitiko ichi chichaitika mumhando dzose dzegaskets, asi kuzorora kwekunetseka kwePTFE pad kwakanyanya, uye kunofanira kungwarira.

Iko friction coefficient ye PTFE idiki (compression stress yakakura kudarika 4MPa, friction coefficient i 0.035 ~ 0.04), uye gasket iri nyore kutsvedza kunze kana isati yasimbiswa, saka zviri nani kushandisa concave uye convex flange pamusoro.Kana iyo flat flange ikashandiswa, iyo dhayamita yekunze ye gasket inogona kubatwa nebhaudhi kudzivirira gasket kuti isatsvedza kunze.

Nekuda kwekuti girazi rekugadzira midziyo yakanyungudutswa mushure mekupfapfaidza dhizaini yeenamel pamusoro pesimbi, iyo glaze layer ine brittle, pamwe nekusaenzana kupfapfaidza uye glaze layer inoyerera, iyo yepamusoro flatness yeflange haina kunaka.Iyo simbi inoumba gasket iri nyore kukuvadza glaze layer, saka zvinokurudzirwa kushandisa yakakosha zvinhu zvakagadzirwa neasbestos board uye rubber PTFE kurongedza.Iyo yekurongedza iri nyore kuenderana neiyo flange pamusoro uye inoshingirira kune corrosion, uye mashandisiro ekushandisa akanaka.

Kune mafekitari akawanda mutembiricha, kudzvanywa hakuna kukwirira munzvimbo yakasimba inoparadza, kushandiswa kweasbestos rabha ndiro yakaputirwa PTFE raw material bhandi, kazhinji disassembled manholes, pombi.Nekuti kugadzira uye kushandiswa kuri nyore kwazvo, kwakakurumbira.