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href="http://www.cdcfah.com/cp/first-_jxjxysb/">機(jī)械及行業(yè)設(shè)備</a>?<a href="http://www.cdcfah.com/cp/second-jxjxysb_famenti/">閥門(mén)</a>?<a href="http://www.cdcfah.com/cp/third-famenti_diefakna/">蝶閥</a>?江蘇專業(yè)真空管道蝶閥制造廠家頂耕國(guó)際貿(mào)易供應(yīng)</p><div id="lipwtvh" class="leftbox clearfix"><h1>江蘇專業(yè)真空管道蝶閥制造廠家頂耕國(guó)際貿(mào)易供應(yīng)</h1><div id="8jvhjqm" class="proBig"><div id="uzw8sk7" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129736101689453/4021167.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="78gvnk4" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129736101689453/4021167.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="dco77nu" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>江蘇專業(yè)真空管道蝶閥制造廠家</p><p><span>***更新：</span>2020-05-30 02:19:18</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="3bx2ogv" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">頂耕國(guó)際貿(mào)易（上海）有限公司</a></p><p><span>聯(lián)系人：</span>查劍來(lái)</p><p><span>郵箱: </span></p><p><span>電話: </span>18521036598</p><p><span>傳真: </span>021_61637356</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-61637356</p><p><span>地址: </span>大葉公路5225號(hào)1幢2370室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="xhtvcet" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="oyvnp3z" class="box"><p><p> 雙偏心和三偏心蝶閥的區(qū)別是什么？雙偏心蝶閥雙偏心蝶閥是哪兩個(gè)偏心？***個(gè)偏心是密封座中心線與閥軸中心線偏移一定的距離，使閥門(mén)密封座與軸互不干涉；第二個(gè)偏心是將閥軸中心線比閥體(或管道)中心線抬高一定距離，同時(shí)在蝶板上將裝閥軸的軸孔中心線比蝶板外圓中心線也偏移一定的距離。雙偏心蝶閥的閥座材質(zhì)使用四氟乙烯材料，可以有效的防腐蝕，此外也可以采用金屬密封閥座，來(lái)適應(yīng)高溫工況環(huán)境。但是采用金屬密封閥座的雙偏心蝶閥，蝶板與閥座的密封面是線接觸，密封屬于位置密封結(jié)構(gòu)，這種密封結(jié)構(gòu)不能耐高壓，如果在高壓的工況中使用會(huì)產(chǎn)生大量的泄漏，所以在高壓的工況環(huán)境或要求切斷嚴(yán)密的系統(tǒng)中，不要使用金屬密封閥座的雙偏心蝶閥。三偏心蝶閥三偏心蝶閥是哪三個(gè)偏心？***個(gè)偏心是閥軸位于閥板軸后面，使得密封能夠完全緊密環(huán)繞接觸整個(gè)閥座，江蘇專業(yè)真空管道蝶閥制造廠家。第二個(gè)偏心是閥軸中心線偏離管道和閥門(mén)中心線，避免受閥門(mén)開(kāi)啟和關(guān)閉的干擾，江蘇專業(yè)真空管道蝶閥制造廠家。第三個(gè)偏心是閥座錐體軸偏離閥軸中心線，這樣可以在關(guān)閉和開(kāi)啟過(guò)程中消除摩擦作用，江蘇專業(yè)真空管道蝶閥制造廠家，并且實(shí)現(xiàn)環(huán)繞整個(gè)閥座的均勻一致的壓縮密封效果。三偏心蝶閥即吸收了其他蝶閥產(chǎn)品的優(yōu)點(diǎn)，又回避了其他蝶閥的不足，受到越來(lái)越多用戶和技術(shù)人員的重視。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇專業(yè)真空管道蝶閥制造廠家" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129736101689453/4021167.png"></div><p> 真空閥門(mén)公稱通徑：(nominal diameter)，又稱平均外徑(mean outside diameter)，表示符號(hào)DN，就是各種管子與管路附件的通用口徑。同一公稱直徑的管子與管路附件均能相互連接，具有互換性.它不是實(shí)際意義上的管道外徑或內(nèi)徑，雖然其數(shù)值跟管道內(nèi)徑較為接近或相等，為了使管子、管件連接尺寸統(tǒng)一，采用公稱直徑（也稱公稱口徑、公稱通徑)。例如焊接鋼管按厚度可分為薄壁鋼管、普通鋼管和加厚鋼管。其公稱直徑不是外徑，也不是內(nèi)徑，而是近似普通鋼管內(nèi)徑的一個(gè)名義尺寸。每一公稱直徑，對(duì)應(yīng)一個(gè)外徑，其內(nèi)徑數(shù)值隨厚度不同而不同。公稱直徑可用公制mm表示，也可用英制in表示。管路附件也用公稱直徑表示，意義同有縫管。 </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇專業(yè)真空管道蝶閥制造廠家" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737719785157/327671.jpg"></div><p> <p> 國(guó)外閥門(mén)密封等級(jí)的選用 </p> 前蘇聯(lián)對(duì)閥門(mén)密封等級(jí)分類主要是20世紀(jì)50年代應(yīng)用，隨著前蘇聯(lián)的解體，現(xiàn)大多數(shù)國(guó)家都不選用此密封等級(jí)分類，而是選用歐美標(biāo)準(zhǔn)的密 </p> <p> <br /> </p> <p> 封等級(jí)分類。歐洲標(biāo)準(zhǔn)EN 12266—1密封等級(jí)分類符合國(guó)際標(biāo)準(zhǔn)化組織標(biāo)準(zhǔn)ISO 5208的規(guī)定，但缺AA、CC和EE三個(gè)等級(jí)。ISO 5208與1999版相比，新增了AA、CC、E、EE、F和G六個(gè)等級(jí)。ISO 5208標(biāo)準(zhǔn)給出了與API 598和EN 12266標(biāo)準(zhǔn)幾個(gè)密封等級(jí)的比較。 </p> <p> <br /> </p> <p> ④。其他公稱尺寸密封等級(jí)的比較可按口徑計(jì)算泄漏量得出 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇專業(yè)真空管道蝶閥制造廠家" src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737493554688/8379117.png"></div></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/82014.html</p></div></div></div></div></div><div id="kjqsevx" class="page-right twoColRt"><div id="3e2jt83" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="8lnubnu" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="8iu3jl3" 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