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class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="gax32mj" class="twoCol"><div id="ba73qpg" 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>?湖南德國真空管道蝶閥密封頂耕國際貿(mào)易供應(yīng)</p><div id="dxphjye" class="leftbox clearfix"><h1>湖南德國真空管道蝶閥密封頂耕國際貿(mào)易供應(yīng)</h1><div id="ispm2co" class="proBig"><div id="3g87k3x" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737890507813/9234469.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="jovij27" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737890507813/9234469.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="cbiprqc" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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>湖南德國真空管道蝶閥密封</p><p><span>***更新：</span>2020-06-09 13:19:29</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="yxuwykw" 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="mwol8hj" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="m7fqnur" class="box"><p><p> 2 國際上閥門密封等級分類標(biāo)準(zhǔn) </p> <p> <br /> </p> <p> 目前圍際上比較常用的閥門密封等級分類標(biāo)準(zhǔn)主要有以下。 </p> <p> <br /> </p> <p> 2．2 國際標(biāo)準(zhǔn)化組織對閥門密封等級的分類 </p> <p> <br /> </p> <p> 國際標(biāo)準(zhǔn)化組織標(biāo)準(zhǔn)ISO5208《工業(yè)閥門金屬閥門的壓力試驗(yàn)》。 </p> <p> <br /> </p> <p> 2．3 美國石油協(xié)會(APl)對閥門密封等級的分類美國石油協(xié)會標(biāo)準(zhǔn)API 598--2004《閥門的檢查和試驗(yàn)》。 </p> <p> <br /> </p> <p> 2．4 美國閥門和管件工業(yè)制造商標(biāo)準(zhǔn)化協(xié)會(MSS)對閥門密封等級的分類美國閥門和管件工業(yè)制造商標(biāo)準(zhǔn)化協(xié)會標(biāo)準(zhǔn)《鋼制閥門的壓力試驗(yàn)》MSS SP61允許的閥門泄漏量要求如下： </p> <p> <br /> </p> <p> (1)在閥門密封副中有一個密封面使用塑料或橡膠的情況下，在密封試驗(yàn)的持續(xù)時間內(nèi)應(yīng)無可見泄漏。 </p> <p> <br /> </p> <p> (2)關(guān)閉時每一側(cè)的比較大允許泄漏量應(yīng)是：液體為公稱尺寸(DN)每毫米，湖南德國真空管道蝶閥密封、每小時0．4毫升；氣體為公稱尺寸(DN)每毫米、每小時120毫升，湖南德國真空管道蝶閥密封。 </p> <p> <br /> </p> <p> (3)止回閥允許的泄漏量可增大4倍。 </p> <p> <br /> </p> <p> 2．5 美國國家標(biāo)準(zhǔn)／美國儀表協(xié)會標(biāo)準(zhǔn)(ANSI／FCI)對控制閥密封等級的分類 </p> <p> <br /> </p> <p> 美國國家標(biāo)彬美國儀表協(xié)會標(biāo)準(zhǔn)ANSI／FCI70-2(ASME B16．104)《控制閥閥座泄漏》。 </p> <p> <br /> </p> <p> 2．6 歐盟標(biāo)準(zhǔn)對閥門密封等級的分類 </p> <p> <br /> </p> <p> 歐洲標(biāo)準(zhǔn)EN 12266—1《工業(yè)閥門閥門的試驗(yàn)》第l部分，湖南德國真空管道蝶閥密封。壓力試驗(yàn)、試驗(yàn)方法和驗(yàn)收標(biāo)準(zhǔn)-強(qiáng)制性要求。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南德國真空管道蝶閥密封" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737890507813/9234469.jpg"></div><p> 閥門非金屬密封件材料有： </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 1.合成橡膠 </p> <p> <br /> </p> <p> 合成橡膠與天然橡膠相比，有更好的耐油、耐溫、耐酸堿性能。一般合成橡膠的使用溫度≤150℃，天然橡膠≤60℃ </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 2.聚四氟乙烯 </p> <p> <br /> </p> <p> 聚四氟乙烯具有良好的耐腐蝕性，多用于溫度≤232℃、公稱壓力≤64公斤。 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 3.尼龍 </p> <p> <br /> </p> <p> 尼龍的優(yōu)勢在于摩擦系數(shù)小、耐腐蝕性好。這種材料多用于溫度≤90℃、公稱壓力≤32公斤的球閥、截止閥密封材料中。 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 閥門金屬密封件材料有： </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 1.灰鑄鐵 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 灰鑄鐵可以用于溫度在-15~200℃之間、公稱壓力≤16公斤的蝶閥、閘閥、截止閥、旋塞閥等中的密封材料。 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 2.球墨鑄鐵 </p> <p> <br /> </p> <p> 球墨鑄鐵作為密封材料可以用在溫度在-30~350℃之間，公稱壓力≤40公斤的蝶閥、閘閥、止回閥，球閥中。 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 3.銅合金 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 銅合金常用材料有6-6-3錫青銅和58-2-2錳黃銅等。銅合金耐磨性好，適用于溫度≤200℃、公稱壓力≤16公斤的水和蒸汽中 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 4.鉻不銹鋼 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 鉻不銹鋼常用的有2Cr13、3Cr13，耐腐蝕性能好。常用于溫度≤450℃、公稱壓力≤32公斤的水、蒸汽和石油等介質(zhì)的閥門上。 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 5.鉻鎳鈦不銹鋼 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> 鉻鎳鈦不銹鋼常用的有1Cr18Ni9ti，該種材質(zhì)擁有良好的耐腐性、耐沖蝕性和耐熱性能。適用于溫度≤600℃、公稱壓力≤60公斤的蒸汽、硝酸等介質(zhì)中 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南德國真空管道蝶閥密封" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129736101689453/4021167.png"></div><p> 可以在減少毛細(xì)管直徑和介質(zhì)粘度較大的情況下，來實(shí)現(xiàn)防止泄漏或減少泄漏量的目的。2氣體的密封性根據(jù)泊松公式，氣體的密封性與氣體分子和氣體的粘性有關(guān)。泄漏與毛細(xì)管的長度和氣體的粘度成反比，與毛細(xì)管的直徑和驅(qū)動力成正比。當(dāng)毛細(xì)管的直徑和氣體分子的平均自由度相同時，氣體分子就會以自由的熱運(yùn)動流進(jìn)毛細(xì)管。因此，當(dāng)我們在做閥門密封試驗(yàn)的時候，介質(zhì)一定要用水才能起到密封的作用，用空氣即氣體就不能起到密封的作用。即使我們通過塑性變形方式，將毛細(xì)管直徑降到氣體分子以下，也仍然不能阻止氣體的流動。原因在于氣體仍然可以通過金屬壁擴(kuò)散。所以我們在做氣體試驗(yàn)時，一定要比液體試驗(yàn)更加的嚴(yán)格。3泄漏通道的密封原理閥門密封由散布在波形面上的不平整度和波峰間距離的波紋度構(gòu)成粗糙度兩個部分組成。在我國大部分的金屬材料彈性應(yīng)變力都較低的情況下，如果要達(dá)到密封的狀態(tài)，就需要對金屬材料的壓縮力提更高的要求，即材料的壓縮力要超過其彈性。因此，在進(jìn)行閥門設(shè)計(jì)時，密封副結(jié)合一定的硬度差來匹配，在壓力的作用下，就會產(chǎn)生一定程度的塑性變形密封的效果。如果密封表面都是金屬材料，那么表面不平整的凸出點(diǎn)就會**早的出現(xiàn)。</p><div style="width:100%;text-align: 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