Butterfly valve seatchikamu chinobviswa mukati mevharuvhu, basa guru ndere kutsigira vheji yevhavha yakazaruka kana yakavharwa zvakakwana, uye inoumba chisimbiso chekuvhara. Kazhinji, dhayamita yechigaro ndiyo saizi yevhavha caliber. Butterfly valve seat zvinhu zvakapamhama, zvinowanzoshandiswa zvisimbiso zvakapfava EPDM, NBR, PTFE, uye simbi yakaoma sealing carbide zvinhu. Tevere tichasuma mumwe nemumwe.
1.EPDM-Kuenzaniswa nemamwe-general-purpose rubber, EPDM rubber ine zvakanakira zvikuru, zvinonyanya kuratidzwa mu:
A. Yakanyanya kudhura, mumabhanana anowanzoshandiswa, EPDM's raw rubber seal ndiyo yakareruka, unogona kuita zvakawanda zvekuzadza, kuderedza mari yerubha.
B. EPDM zvinhu kuchembera kuramba, kutsungirira kuratidzwa kwezuva, kupisa kupisa, mvura vapor resistance, radiation resistance, yakakodzera kune isina kusimba asidhi uye alkali media, yakanaka insulation properties.
C. Temperature range, iyo yakaderera inogona kuva -40 ° C - 60 ° C, inogona kuva 130 ° C tembiricha mamiriro ekushandiswa kwenguva refu.
2.NBR-oiri inopesana, inodzivirira kupisa, inopfeka uye panguva imwechete ine mvura yakanaka yekudzivirira, kuvhara kwemhepo uye yakanakisa kubatanidza zvinhu. Zvimwe zvikumbiro mupombi yemafuta, iyo yakashata ndeyekuti haidziviriri kune yakaderera tembiricha, ozone kuramba, kushomeka kwekudzivirira zvivakwa, elasticity zvakare yakajairika.
3. PTFE: a fluorine epurasitiki, nyaya iyi ane simba kuramba asidhi uye alkali, kang siyana organic zvinonyungudutsa kuita, nepo mashoko ari mukuru tembiricha kuramba, inogona kushandiswa kuramba ari 260 ℃, tembiricha yepamusoro inogona kusvika 290-320 ℃, PTFE akaonekwa, vakabudirira kugadzirisa makemikari indasitiri, peturu, mamwe matambudziko mumunda wemishonga uye mamwe matambudziko emumunda wemishonga.
4. Simbi yakaoma chisimbiso (carbide): simbi yakaoma seal seal valve chigaro chechigaro chine yakanaka kwazvo kupikisa kupisa kwakanyanya uye kumanikidza kwakanyanya, corrosion resistance, kupfeka kupikisa hunhu, yakanaka kwazvo kugadzirisa hurema hwechisimbiso chakapfava hachidzivirirwe nekupisa kwakanyanya uye kumanikidza kwakanyanya, asi chisimbiso chakaomarara pane zvinodiwa pakugadzirisa chirongwa chakanyanya kukwirira, iyo chete yekusagadzikana kweiyo chigaro chisimbiso ichava isina kunaka kwechigaro chesimbi mushure menguva refu yekuisa chisimbiso. kushanda kwebasa rekudonha.