江西官方真空管道蝶閥泄露頂耕國(guó)際貿(mào)易供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買(mǎi)產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content=" **閥門(mén)選用的注意事項(xiàng)本文詳述了**閥門(mén)選用的注意事項(xiàng)。常規(guī)閥門(mén)選用的注意事項(xiàng)本文詳述了常規(guī)閥門(mén)選用的注意事項(xiàng)，如閥門(mén)的使用要求、從工藝要求角度考慮、從操作方便角度考慮、從調(diào)節(jié)流量的準(zhǔn)確性考慮"><meta name="keywords" content="江西官方真空管道蝶閥泄露"><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="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(huà): </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(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="hvbzh9p" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="v99bhfr" class="box"><p><p> **閥門(mén)選用的注意事項(xiàng)本文詳述了**閥門(mén)選用的注意事項(xiàng)。常規(guī)閥門(mén)選用的注意事項(xiàng)本文詳述了常規(guī)閥門(mén)選用的注意事項(xiàng)，如閥門(mén)的使用要求、從工藝要求角度考慮、從操作方便角度考慮、從調(diào)節(jié)流量的準(zhǔn)確性考慮、從耐溫耐壓能力考慮、從可潔凈性考慮。閥門(mén)選用步驟本文詳述了選用閥門(mén)一般遵循的七個(gè)步驟。閥門(mén)的選用原則選用閥門(mén)應(yīng)滿(mǎn)足的基本原則：安全可靠性、滿(mǎn)足工藝生產(chǎn)要求、操作及安裝與檢(維)修方便、經(jīng)濟(jì)性。平板閘閥的密封原理本文講述了平板閘閥的密封原理，比如平行單閘板閘閥、自動(dòng)密封式平行雙閘板閘閥、撐開(kāi)式平行雙閘板等。平板閘閥的常見(jiàn)結(jié)構(gòu)平行式閘板兩密封面相互平行，江西官方真空管道蝶閥泄露，并有平行式單閘板和平行式雙閘板之分，江西官方真空管道蝶閥泄露。平板閘閥的基本特點(diǎn)平板閘閥是一個(gè)啟閉動(dòng)作為直線(xiàn)運(yùn)動(dòng)的閥門(mén)，本文講述了平板閘閥的基本特點(diǎn)。閘閥的結(jié)構(gòu)本文講述了閘閥的結(jié)構(gòu)，如閥體與閥蓋結(jié)構(gòu)、閥桿結(jié)構(gòu)、閥座結(jié)構(gòu)、縮徑。閘閥的常見(jiàn)分類(lèi)閘閥有各種不同的結(jié)構(gòu)形式，其主要區(qū)別是所采用的密封元件結(jié)構(gòu)類(lèi)型不同。本文講述了按閥桿分類(lèi)和按結(jié)構(gòu)類(lèi)型分類(lèi)。閘閥的工作原理及特點(diǎn)閘閥又叫閘板閥,主要由閥體、閥蓋、閘板，江西官方真空管道蝶閥泄露、閥桿、閥座和密封填料等部分組成。本文講述了閘閥的工作原理及特點(diǎn)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西官方真空管道蝶閥泄露" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749325380860/6768130.png"></div><p> 閥門(mén)密封圈材料使用條件非金屬類(lèi):1聚四氟乙烯,代號(hào)F聚四氟乙烯多用于溫度t≤232℃、公稱(chēng)壓力PN≤、閘閥、球閥等。2合成橡膠,代號(hào)X合成橡膠的耐油、耐溫、耐腐蝕等綜合性能優(yōu)于天然橡膠。一般合成橡膠的使用溫度t≤150℃，天然橡膠t≤60℃，橡膠用于公稱(chēng)壓力PN≤1MPa的截止閥、閘閥、隔膜閥、蝶閥、止回閥、夾管閥等閥門(mén)的密封。3尼龍,代號(hào)N尼龍具有摩擦系數(shù)小、耐腐蝕性好等特點(diǎn)。尼龍多用于溫度t≤90℃、公稱(chēng)壓力PN≤32MPa的球閥、截止閥等。金屬類(lèi):4巴氏合金,代號(hào)B巴氏合金用于溫度t-70~150℃、公稱(chēng)壓力PN≤。5鉻不銹鋼,代號(hào)H鉻不銹鋼常用牌號(hào)有2Cr13、3Cr13經(jīng)調(diào)質(zhì)處理，耐腐蝕性能好。常用于溫度t≤450℃、公稱(chēng)壓力PN≤32MPa的水、蒸汽和石油等介質(zhì)的閥門(mén)上。6鉻鎳鈦不銹鋼,代號(hào)R鉻鎳鈦不銹鋼常用牌號(hào)為1Cr18Ni9ti，其耐腐性、耐沖蝕性和耐熱性能較好。適用于溫度t≤600℃、公稱(chēng)壓力PN≤、硝酸等介質(zhì)中，用于截止閥、球閥等。7銅合金。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西官方真空管道蝶閥泄露" src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737493554688/8379117.png"></div><p> 低泄漏閥門(mén)是指閥門(mén)實(shí)際泄漏量很小，靠常規(guī)的水壓、氣壓密封試驗(yàn)已不能判定，需要借助更加先進(jìn)的手段和儀器來(lái)檢測(cè)的微小外泄漏。目前國(guó)際上比較常用的檢測(cè)閥門(mén)低泄漏的標(biāo)準(zhǔn)主要有以下三種： </p> <p> <br /> </p> <p> (1)美國(guó)環(huán)境保護(hù)署EPA method 21《揮發(fā)性有機(jī)組分泄漏檢測(cè)》。 </p> <p> <br /> </p> <p> (2)國(guó)際標(biāo)準(zhǔn)化組織ISO 15848(工業(yè)閥門(mén)：低泄漏測(cè)量、試驗(yàn)及資格認(rèn)定程序》。 </p> <p> <br /> </p> <p> (3)殼牌石油公司SHELL MESC SPE 77／312《工業(yè)閥門(mén)：低泄漏測(cè)量、分級(jí)系統(tǒng)、資格認(rèn)定程序及開(kāi)關(guān)閥和控制閥的型式認(rèn)可和產(chǎn)品試驗(yàn)》。 </p> <p> <br /> </p> <p> 美國(guó)環(huán)境保護(hù)署EPA Method 21標(biāo)準(zhǔn)*規(guī)定了檢測(cè)方法而沒(méi)有泄漏等級(jí)的劃分，屬于地方性標(biāo)準(zhǔn)法規(guī)，應(yīng)用較少。國(guó)際標(biāo)準(zhǔn)化組織ISO 15848和殼牌石油公司SHELL MESC SPE 77／312這兩個(gè)標(biāo)準(zhǔn)，對(duì)于閥門(mén)的性能，都從緊密等級(jí)、耐久等級(jí)和溫度等級(jí)三個(gè)方面進(jìn)行評(píng)定。緊密等級(jí)針對(duì)閥桿和閥體密封處的泄漏，分為A，B，C三個(gè)等級(jí)，對(duì)于ISO 15848標(biāo)準(zhǔn)閥體密封處的泄漏要求≤50 em3／m3，而閥桿處的泄漏兩個(gè)標(biāo)準(zhǔn)均是按照閥桿的直徑計(jì)算的。 </p> <p> <br /> </p> <p> ISO 15848A級(jí)密封等級(jí)比較高，B，c級(jí)密封等級(jí)同SHELLMESC SPE 77／312標(biāo)準(zhǔn)。通常低泄漏閥門(mén)的密封等級(jí)低于B級(jí)，而波紋管密封閥門(mén)由于在閥桿密封部位采用金屬波紋管密封，其密封等級(jí)低于A級(jí)。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西官方真空管道蝶閥泄露" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749337304688/5807955.png"></div></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/181054.html</p></div></div></div></div></div><div id="brhfn7t" class="page-right twoColRt"><div id="ndjh7l7" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="pfd7pjx" 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 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