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tcPro"><section class="home-main container clearfix"><div id="jv2rivk" class="twoCol"><div id="wqx73iu" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁(yè)?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a 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</a>?<a href="http://www.cdcfah.com/cp/third-famenti_diefakna/">蝶閥</a>?山西進(jìn)口真空管道蝶閥重量頂耕國(guó)際貿(mào)易供應(yīng)</p><div id="7e2doqc" class="leftbox clearfix"><h1>山西進(jìn)口真空管道蝶閥重量頂耕國(guó)際貿(mào)易供應(yīng)</h1><div id="kjqfb7c" class="proBig"><div id="7sf3vh2" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494189453/4103674.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="7c23czq" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494189453/4103674.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="mqicyfm" 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>山西進(jìn)口真空管道蝶閥重量</p><p><span>***更新：</span>2020-06-06 15:17:10</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="p3d2ace" 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="fzr3ifr" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="ysztkwt" class="box"><p><p> 真空閥門公稱通徑：(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，山西進(jìn)口真空管道蝶閥重量、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，山西進(jìn)口真空管道蝶閥重量，對(duì)應(yīng)一個(gè)外徑，其內(nèi)徑數(shù)值隨厚度不同而不同，山西進(jìn)口真空管道蝶閥重量。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="山西進(jìn)口真空管道蝶閥重量" src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494189453/4103674.png"></div><p> 美國(guó)國(guó)家標(biāo)影美國(guó)儀表協(xié)會(huì)標(biāo)準(zhǔn)ANSI／FCI 70-2(ASME B16．104)適用于控制閥密封等級(jí)的規(guī)定。工程設(shè)計(jì)中應(yīng)根據(jù)介質(zhì)的特性和閥 </p> <p> <br /> </p> <p> 門的開(kāi)啟頻率等因素考慮選擇金屬?gòu)椥悦芊饣蚪饘倜芊狻＝饘倜芊饪刂崎y密封等級(jí)應(yīng)在訂貨合同中規(guī)定。根據(jù)經(jīng)驗(yàn)，對(duì)于金屬密封控制閥，I、Ⅱ、Ⅲ級(jí)要求較低，工程設(shè)計(jì)中選用的比較少，通常一般金屬密封的控制閥比較低選用Ⅳ級(jí)，比較關(guān)鍵的控制閥選用V或Ⅵ級(jí)。某乙烯裝置火炬系統(tǒng)的控制閥設(shè)計(jì)，選用了金屬密封Ⅳ級(jí)要求，運(yùn)行良好。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西進(jìn)口真空管道蝶閥重量" src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737718496094/8657721.jpg"></div><p> 優(yōu)點(diǎn) </p> <p> 1、啟閉方便迅速、省力、流體阻力小，可以經(jīng)常操作。 </p> <p> 2、結(jié)構(gòu)簡(jiǎn)單，外形尺寸小，結(jié)構(gòu)長(zhǎng)度短，體積小，重量輕，適用于大口徑的閥門。 </p> <p> 3、可以運(yùn)送泥漿，在管道口積存液體**少。 </p> <p> 4、低壓下，可以實(shí)現(xiàn)良好的密封。 </p> <p> 5、調(diào)節(jié)性能好。 </p> <p> 6、全開(kāi)時(shí)閥座通道有效流通面積較大，流體阻力較小。 </p> <p> 7、啟閉力矩較小，由于轉(zhuǎn)軸兩側(cè)蝶板受介質(zhì)作用基本相等，而產(chǎn)生轉(zhuǎn)矩的方向相反，因而啟閉較省力。 </p> <p> 8、密封面材料一般采用橡膠、塑料、故低壓密封性能好。 </p> <p> 9、安裝方便。 </p> <p> 10、操作靈活省力，可選擇手動(dòng)、電動(dòng)、氣動(dòng)、液壓方式。 </p><div 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