Zvisimbiso zvevharuvhu: Ungasiyanisa sei uye kusarudza zvigaro zvevharuvhu zvePTFE, EPDM, uye PFA?

1: Ndeupi musiyano unonyanya kukosha pakati pezvinhu zvePTFE, EPDM nePFA?

PTFE (Polytetrafluoroethylene):Inozivikanwa semambo wepurasitiki, isimbi chena ine makemikari asina simba uye inodzivirira kupisa (-196℃ ~ + 200℃). Ine friction coefficient yakaderera zvikuru, asi magadzirirwo ayo akapfava uye haagoni kupfekwa uye kumanikidzwa kwakanyanya.

EPDM (ethylene propylene diene monomer):rabha nhema inoraswa. Chinhu chikuru ndechekudzivirira zvakanyanya mvura inopisa, utsi, asidhi nealkali (asidhi isina simba uye alkali isina simba) uye kudzivirira mamiriro ekunze. Dambudziko nderekuti haidziviriri mafuta emaminerari uye hydrocarbon solvents.

PFA (perfluoroalkoxy resin):PTFE yakagadziriswa inogadziriswa nekunyungudika. Kushanda kwayo kwakafanana nePTFE, asi kuramba kwayo tembiricha yakakwira kwakanyanya (+260°C), uye inogona kugadzirwa kuita chigaro chevharuvhu chakasimba chine nzvimbo yakapfava kuburikidza nekuumbwa kwejekiseni. Kuramba kwayo kukambaira uye kuramba kutsemuka kuri nani pane PTFE.

2: Panyaya yekushandiswa kwemidziyo yemagetsi, ndeapi mafluids akakodzera?

PTFE: Inoshanda kune anenge ese maacid akasimba, mabhesi akasimba, uye zvinonyungudutsa zve organic, asi haikodzeri simbi dzakanyungudutswa dze alkali uye gasi re fluorine rinopisa zvakanyanya.

EPDM:Yakakodzera zvikuru mvura inopisa, steam, phosphate ester hydraulic oil, brake fluid, weak acids uye bases. Zvinorambidzwa zvachose kushandisa mafuta ane petroleum-based (petroleum, diesel), toluene, uye concentrated acids.

PFA:Inodzivirira ngura yese yePTFE uye yakagadzikana zvakanyanya kana tembiricha yakakwira uye kumanikidzwa. Inonyanya kukodzera makemikari akachena zvakanyanya (akadai sesulfuric acid ine purity yakawanda uye nitric acid inoshandiswa muindasitiri yesemiconductor).

3: Ungasarudza sei pakati pezvinhu zvitatu izvi maererano nehunyanzvi hwemuviri?

Kuisa chisimbiso:EPDM > PTFE ≈ PFA. Rabha ine simba rakasimba rekuchinja-chinja uye inoshivirira zvakanyanya kukwenya pamusoro pechigaro chevharuvhu; PTFE/PFA inoda kumanikidzwa kukuru kwekutanga kwekuvharwa.

Kuramba tembiricha: PFA (+260℃) > PTFE (+200℃) > EPDM (kazhinji +120℃, fomura yakakosha +150℃).

Kuramba kupfeka:PFA > PTFE > EPDM. Midhiya ine zvidimbu zvinokurumidza kupfeka chigaro chevharuvhu cheEPDM, zvichiita kuti switch ivhare.

Zvinodiwa pakushanda kwetorque:PTFE/PFA ine low friction coefficient uye small switching torque. EPDM ine friction coefficient yakakura, zvichiita kuti zvive zvakaoma kuvhura nekuvhara vharuvhu.

4: Ungakurumidza sei kusarudza zvinhu zvichienderana nemamiriro ekushanda?

Danho rekutanga:Tarisa kana chinhu chacho chine mafuta. Kana chiri mafuta emineral kana mafuta emafuta, bvisa EPDM wosarudza PTFE kana PFA.

Danho rechipiri:Tarisa tembiricha iri pakati nepakati uye kuchena kwayo. Kana tembiricha yakakwira (>150°C) kana magasi anopindika zvakanyanya (senge chlorine), PFA ndiyo inosarudzwa. Kana tembiricha isiri yepamusoro (<120℃) uye iri mvura, utsi kana mhepo, EPDM ndiyo sarudzo inonyanya kushanda.

Danho rechitatu:Tarisa kana paine zvidimbu kana kuchinjana kwakajairika. Kana zvichigadziriswa kakawanda kana kuti zvine zvidimbu zvakaoma, sarudza PFA. Kucheka kamwe chete uye pasina zvidimbu, PTFE inosarudzwa.

5: Pane chinhu "chinowanikwa pasi rose" here?

Kwete. Kana uchida kuramba tembiricha yakakwira, ngura yakasimba uye mafuta panguva imwe chete, PFA ndiyo sarudzo yekutanga, asi inodhura (inenge katatu kusvika kashanu kupfuura PTFE) uye mashandiro ayo ekuvharira haana kunaka serabha. Kana nzira yacho isingashandisi mafuta uye tembiricha isiri yakakwira, EPDM ndiyo inodhura zvakanyanya. Sarudzo yakajairika yekuchengetedza iPTFE.

6: Pfupiso

Kusarudza chisimbiso chakakodzera kunogona kuwedzera hupenyu hwevharuvhu kaviri.Tianjin Tanggu Mvura-Chisimbiso Valve Co., Ltd- inonyanya kugadziramavharuvhu eshavishavi, mavharuvhu egedhiuyemavharuvhu ekuongorora, uye inyanzvi mukugadzirisa zvinhu zvekuvharira zvakaita sePTFE, EPDM, uye PFA. Hatigadziri mavharuvhu "epasi rose", asi takazvipira kupa nzira yekuvharira yakasimba uye isingadhuri yemapaipi ako ese. Kana uine mibvunzo nezvesarudzo,TWStimu yehunyanzvi yakagadzirira kunyatsoongorora kurova kwemoyo wako.