安徽煉鋼廠真空管道蝶閥價(jià)格頂耕國際貿(mào)易供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="真空管道閥門公稱壓力：(Nominalpressure)，表示符號(hào)PN，在一定溫度下應(yīng)用時(shí)允許的比較大工作壓力。對(duì)碳鋼閥體的控制閥，指200℃以下應(yīng)用時(shí)允許的比較大工作壓力；對(duì)鑄鐵閥體，安徽煉鋼廠真空管道蝶閥價(jià)格，指120℃以下應(yīng)用時(shí)允許的"><meta name="keywords" content="安徽煉鋼廠真空管道蝶閥價(jià)格"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta 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class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<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>?安徽煉鋼廠真空管道蝶閥價(jià)格頂耕國際貿(mào)易供應(yīng)</p><div id="ssq4ka4" class="leftbox clearfix"><h1>安徽煉鋼廠真空管道蝶閥價(jià)格頂耕國際貿(mào)易供應(yīng)</h1><div id="magoe24" class="proBig"><div id="gk2u2ue" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749328144532/3165155.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="22e4wm4" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749328144532/3165155.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="syomukq" 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>安徽煉鋼廠真空管道蝶閥價(jià)格</p><p><span>***更新：</span>2020-05-31 05:18:42</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="yy4yw4m" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">頂耕國際貿(mào)易（上海）有限公司</a></p><p><span>聯(lián)系人：</span>查劍來</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="u4y0cag" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="w2agmay" class="box"><p><p> 真空管道閥門公稱壓力：(Nominal pressure)，表示符號(hào)PN，在一定溫度下應(yīng)用時(shí)允許的比較大工作壓力。對(duì)碳鋼閥體的控制閥，指200℃以下應(yīng)用時(shí)允許的比較大工作壓力；對(duì)鑄鐵閥體，安徽煉鋼廠真空管道蝶閥價(jià)格，指120℃以下應(yīng)用時(shí)允許的比較大工作壓力；對(duì)不銹鋼閥體的控制閥，指250℃以下應(yīng)用時(shí)允許的比較大工作壓力。當(dāng)工作溫度升高時(shí)，閥體的耐壓會(huì)降低。例如，公稱壓力為6.4MPa（PN64）的碳鋼控制閥，用于300℃時(shí)的耐壓為5.2MPa，用400℃時(shí)的耐壓為4.1MPa，用于450℃時(shí)的耐壓為2.9MPa，安徽煉鋼廠真空管道蝶閥價(jià)格。因此，安徽煉鋼廠真空管道蝶閥價(jià)格，控制閥公稱壓力的確定不*要根據(jù)比較高工作壓力，還需根據(jù)比較高工作溫度和材質(zhì)特性，而不**只需滿足公稱壓力大于工作壓力。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽煉鋼廠真空管道蝶閥價(jià)格" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749328144532/3165155.png"></div><p> 蝶閥的選用原則： </p> <p> <br /> </p> <p> 1、由于蝶閥相對(duì)于閘閥，球閥壓力損失比較大，故適應(yīng)于壓力損失要求不嚴(yán)的管路系統(tǒng)中 </p> <p> <br /> </p> <p> 2、由于蝶閥可以用流量調(diào)節(jié)，故在需要進(jìn)行流量調(diào)節(jié)的管路中宜于選用 </p> <p> <br /> </p> <p> 3、由于蝶閥的結(jié)構(gòu)和密封材料的限制，不宜用于高溫，高壓的管路系統(tǒng)。一般工作溫度在300℃以下，公稱壓力在PN40以下。 </p> <p> <br /> </p> <p> 4、由于蝶閥結(jié)構(gòu)長(zhǎng)度比較短，且又可以做成大口徑，故在結(jié)構(gòu)長(zhǎng)度要求短的場(chǎng)合或是大口徑閥門（如DN1000以上），宜選用蝶閥。 </p> <p> <br /> </p> <p> 5、由于蝶閥*旋轉(zhuǎn)90°就能開啟或關(guān)閉，因此在啟閉要求快的場(chǎng)合宜選用蝶閥。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽煉鋼廠真空管道蝶閥價(jià)格" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749337304688/5807955.png"></div><p> 美國石油協(xié)會(huì)標(biāo)準(zhǔn)API 6D(ISO14313)《石油和天然氣工業(yè)一管線輸送系統(tǒng)一管線閥門》對(duì)閥門泄漏量的接收準(zhǔn)則是：“軟密封閥門和油封旋塞閥的泄漏量不得超過ISO 5208 A級(jí)(不得有可見泄漏)，金屬閥座閥門的泄漏量不得超過ISO 5208(1993)D級(jí)，但按B．4所述的密封試驗(yàn)，其泄漏量不能大于ISO 5208(1993)D級(jí)的二倍，除另有規(guī)定?！睒?biāo)準(zhǔn)中注：“特殊的應(yīng)用可要求泄漏量少于ISO 5208(1993)D級(jí)¨J?！币虼?，工程設(shè)計(jì)中有高于其標(biāo)準(zhǔn)的泄漏量要求，應(yīng)在訂貨合同中給出。API 6D--2008附錄B附加試驗(yàn)要求中規(guī)定了在購方規(guī)定時(shí)制造廠要作的閥f J附加試驗(yàn)要求。密封試驗(yàn)分低壓和高壓氣體密封試驗(yàn)，以惰性氣體作為試驗(yàn)介質(zhì)的高壓密封試驗(yàn)將取代液體上密封試驗(yàn)和液體密封試驗(yàn)。依據(jù)閥門的類型、口徑和壓力級(jí)別選擇密封試驗(yàn)，可參考ISO 5208標(biāo)準(zhǔn)的規(guī)定。對(duì)于長(zhǎng)輸管道GAl、工業(yè)管道GCl上的閥門建議選用低壓密封試驗(yàn)，可以提高閥門的合格品率。選用高壓密封試驗(yàn)時(shí)應(yīng)注意彈性密封閥門經(jīng)高壓密封試驗(yàn)后，可能降低其在低壓工況的密封性能。應(yīng)根據(jù)介質(zhì)使用工況實(shí)際條件，合理地選用閥門密封試驗(yàn)要求，可以有效地降低閥門的生產(chǎn)成本。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽煉鋼廠真空管道蝶閥價(jià)格" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737496982422/7639979.png"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/94114.html</p></div></div></div></div></div><div id="uukqoks" class="page-right twoColRt"><div id="uayeki4" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="qeu2qge" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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