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href="http://www.cdcfah.com/xw/"><span>行業(yè)資訊</span></a></li><li id = "index_show"><a href="http://www.cdcfah.com/zh/"><span>展會(huì)信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="phjbykm" class="twoCol"><div id="b3wya79" 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(mén)</a>?<a href="http://www.cdcfah.com/cp/third-famenti_diefakna/">蝶閥</a>?四川德國(guó)真空管道蝶閥品牌頂耕國(guó)際貿(mào)易供應(yīng)</p><div id="pt7tqsp" class="leftbox clearfix"><h1>四川德國(guó)真空管道蝶閥品牌頂耕國(guó)際貿(mào)易供應(yīng)</h1><div id="wap87hg" class="proBig"><div id="33oaxug" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737496982422/7639979.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wli3haw" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737496982422/7639979.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="vk3b2mw" 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>四川德國(guó)真空管道蝶閥品牌</p><p><span>***更新：</span>2020-06-09 07:19:06</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="ihjbizb" 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="8j8axzg" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="87v22eg" class="box"><p><p> 在所有閥門(mén)驅(qū)動(dòng)裝置中,電動(dòng)和薄膜式氣動(dòng)裝置應(yīng)用**廣。電動(dòng)裝置主要用在閉路閥門(mén)上;薄膜式氣動(dòng)裝置主要用在調(diào)節(jié)閥上。電磁傳動(dòng)主要用于小口徑閥門(mén)上。置入式的波紋管傳動(dòng)裝置主要用在閥瓣的行程不大的閥門(mén)上和有腐蝕性和毒性的介質(zhì)中。但它的使用范圍往往受控制主傳動(dòng)裝置的輔助的先導(dǎo)裝置的限制，四川德國(guó)真空管道蝶閥品牌。 </p> <p> <br /> </p> <p> 對(duì)閥門(mén)驅(qū)動(dòng)裝置的一項(xiàng)特殊要求是,必須能夠限定轉(zhuǎn)矩或軸向力，四川德國(guó)真空管道蝶閥品牌。閥門(mén)電動(dòng)裝置采用限制轉(zhuǎn)矩的聯(lián)軸器。在液動(dòng)和氣動(dòng)驅(qū)動(dòng)裝置中，四川德國(guó)真空管道蝶閥品牌,其比較大作用力取決于膜片或活塞的有效面積以及驅(qū)動(dòng)介質(zhì)的壓力。也可以用彈簧來(lái)限制所傳遞的作用力。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川德國(guó)真空管道蝶閥品牌" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737496982422/7639979.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="四川德國(guó)真空管道蝶閥品牌" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749337304688/5807955.png"></div><p> 對(duì)于易燃易爆、0或有放射的介質(zhì)，外漏更是不能允許的，因而閥門(mén)必須具有可靠的密封性能。如何解決密封問(wèn)題不成輕忽，閥門(mén)跑、冒、滴、漏現(xiàn)象，盡年夜部門(mén)發(fā)生這里。下面我們將計(jì)議閥門(mén)動(dòng)密封、靜密封問(wèn)題。1動(dòng)密封閥門(mén)動(dòng)密封，主指閥桿密封。不讓閥內(nèi)介質(zhì)隨閥桿運(yùn)動(dòng)而泄漏，是閥門(mén)動(dòng)密封中心課題。1)填料函形式閥門(mén)動(dòng)密封，以填料函為主。填料函基本形式是：(1)壓蓋式這是用**多形式。統(tǒng)一形式又能許多細(xì)節(jié)區(qū)分。例如，從壓緊螺栓來(lái)說(shuō)，可分T形螺栓(用于壓力≤16千克/平方厘米低壓閥門(mén))、雙頭螺栓和活節(jié)螺栓等。從壓蓋來(lái)說(shuō)，可分整體式和組合式。(2)壓緊螺母式這類(lèi)形式，外形尺寸小，但壓緊力受限制，只使用于小閥門(mén)。2)填料填料函內(nèi)，以填料與閥桿直接接觸并布滿填料函，阻止介質(zhì)外漏。對(duì)填料有以下要求：(1)密封性好；(2)耐侵蝕；(3)磨擦系數(shù)??；(4)順應(yīng)介質(zhì)溫度和壓力。經(jīng)常使用填料有：(1)石棉盤(pán)根：石棉盤(pán)根，耐溫文耐侵蝕性能都很好，但零丁使用時(shí)，密封效果欠安，總是浸漬或附加其他材料。油浸石棉盤(pán)根：它基本結(jié)構(gòu)形式有兩種，一種是扭制，另外一種是編結(jié)。又可分圓形和方形。(2)聚四氟乙烯編織盤(pán)根：將聚四氟乙烯細(xì)帶編織為盤(pán)根，有極好耐侵蝕性能。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川德國(guó)真空管道蝶閥品牌" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737496894532/5616452.png"></div></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/199025.html</p></div></div></div></div></div><div id="s23nkry" class="page-right twoColRt"><div id="v7ptkmt" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="7dso7pw" 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="vpmeq8w" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" alt="寧波寧海直接考A2有幾個(gè)科目真誠(chéng)推薦寧波助學(xué)商務(wù)信息咨詢(xún)供應(yīng)" class="vcenter" 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