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, chinhu ichi ane simba kuramba asidhi uye alkali, kang siyana organic zvinonyungudutsa kuita, nepo zvinhu iri yakakwirira tembiricha kuramba, inogona kushandiswa kuramba ari 260 ℃, tembiricha yepamusoro inogona kusvika 290-320 ℃ , PTFE yakaonekwa, yakabudirira kugadzirisa indasitiri yemakemikari, petroleum, mishonga uye mamwe maindasitiri mumunda wezvinetso zvakawanda.
4. Metal hard seal (carbide): simbi yakaoma seal seal valve seat zvinhu zvine yakanakisa kuramba tembiricha yakakwira uye yakanyanya kudzvanywa, corrosion resistance, kupfeka hunhu hwekuramba, yakanaka kwazvo kugadzirisa kukanganisa kwechisimbiso chakapfava chisingamirire. tembiricha yakakwira uye yakanyanya kudzvanywa, asi iyo yakaoma chisimbiso zvinhu pazvinoda kugadziriswa kweiyo nzira yakakwira zvakanyanya, iyo chete yakashata yesimbi yakaoma seal seal valve chigaro chekuisa chisimbiso kuita kwakashata, ichave munguva refu mushure mekushanda kwebasa re iyo leakage.