Noho kiwi kīpēHe ʻāpana hiki ke hoʻoneʻe ʻia i loko o ka valve, ʻo ka hana nui ke kākoʻo i ka pā valve e wehe piha a paʻa paha, a ʻo ia ka mea hoʻopaʻa.ʻO ka maʻamau, ʻo ke anawaena o ka noho ka nui o ka caliber valve.He laula loa nā mea noho pahu kīpē, ʻo nā mea maʻamau i hoʻohana ʻia he palupalu sila EPDM, NBR, PTFE, a me nā mea metala paʻa paʻa carbide.Ma hope aʻe e hoʻolauna mākou i kēlā me kēia.
1.EPDM-I hoʻohālikelike ʻia me nā mea ʻē aʻe, ʻo ka EPDM rubber ka mea maikaʻi loa, i ʻike ʻia ma:
A. ʻO ke kumukūʻai maikaʻi loa, i ka maiʻa i hoʻohana mau ʻia, ʻoi aku ka māmā o ka seal rubber maka o EPDM, hiki iā ʻoe ke hana i ka nui o ka hoʻopiha ʻana, e hōʻemi ana i ke kumukūʻai o ka lāʻau.
B. EPDM mea kahiko kū'ē, kū i ka lā, wela kū'ē, wai mahu kū'ē, radiation kū'ē, kūpono no nawaliwali ka waika a me ka alkali media, maikai insulation waiwai.
C. Ke ana wela, hiki ke haʻahaʻa loa -40 ° C - 60 ° C, hiki ke 130 ° C kūlana mahana no ka hoʻohana lōʻihi.
2.NBR-ʻaila kū'ē, pale wela,ʻaʻahu kū'ē a ma ka manawa hoʻokahi he wai maikaʻi ke kū'ēʻana, ka ea sila a me nā waiwai hoʻopaʻa maikaʻi.ʻO nā noi hou aʻe i ka pipeline aila, ʻo ka hemahema ʻaʻole ia e kū i ka haʻahaʻa haʻahaʻa, ka pale ozone, nā waiwai insulation maikaʻi ʻole, ʻo ka elasticity ka laulā.
3. PTFE: he fluorine plastic, keia mea i ka ikaika kū'ē i kaʻakika a me ka alkali, kang nāʻano organic solvents hana, oiai ka mea he kiʻekiʻe wela kū'ē, hiki ke hoʻohana mau ma 260 ℃, ka wela wela hiki ke hiki i 290-320 ℃ , Uaʻikeʻia ka PTFE, ua hoʻoholo maikaʻi i kaʻoihana kemika, kaʻaila, ka lāʻau lapaʻau a me nāʻoihana'ē aʻe ma ke kahua o nā pilikia he nui.
4. Metala paakiki sila (carbide): metala paakiki seal kiwi noho mea he maikaʻi loa kū'ē i ke kiʻekiʻe wela a me ke kiʻekiʻe puʻe, corrosion kū'ē, aahu kū'ē hiʻona, maikaʻi loa e hana i nā hemahema o ka palupalu sila mea 'aʻole kū'ē i. kiʻekiʻe wela a me ke kiʻekiʻe puʻe, akā, ʻo ka mea paʻa paʻa paʻa i nā koi kaʻina o ke kaʻina hana he kiʻekiʻe loa, ʻo ka hemahema wale nō o ka metala paʻa paʻa paʻa valve noho sealing hana ʻino, e lōʻihi ka manawa ma hope o ka hana o ka hana. ka leakage.