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clearfix"><div id="pn7jr79" class="twoCol"><div id="vr7dhfj" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應</a>?<a href="http://www.cdcfah.com/cp/first-_jxjxysb/">機械及行業(yè)設備</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>?安徽德國真空管道蝶閥哪家好頂耕國際貿(mào)易供應</p><div id="xvltzft" class="leftbox clearfix"><h1>安徽德國真空管道蝶閥哪家好頂耕國際貿(mào)易供應</h1><div id="hpxv79p" class="proBig"><div id="9r97f7x" class="bigimg"><div><p class="pic"><img src="http://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="bznhpdt" class="smallimg"><div><p class="pic"><img src="http://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="7phpf9r" 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>安徽德國真空管道蝶閥哪家好</p><p><span>***更新：</span>2020-05-25 09:43:11</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="9vbz7rh" 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: </span>021-61637356</p><p><span>地址: </span>大葉公路5225號1幢2370室</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="rhxfnbh" class="page-proshow02"><p class="title">詳細說明</p><div id="xflthnt" class="box"><p><p> 閥門密封是整個閥門中**重要的組成部分，其主要目的就是防止泄露，安徽德國真空管道蝶閥哪家好，閥門密封座也叫密封圈，它是直接接與管路內(nèi)介質(zhì)接觸，并且阻止介質(zhì)流通的一個組織。閥門在使用中，管道內(nèi)有各種不同的介質(zhì)，如液體、氣體、油品、腐蝕性的介質(zhì)等等，而不同的閥門的密封件，使用的地方也不一樣，能夠適應各種不同的介質(zhì)。那么，閥門密封件材料主要可以分成兩大類，即為金屬材料和非金屬材料，非金屬密封一般多用于常溫常壓的管道，而金屬密封而使用范圍則比較廣，可用于高溫高壓！下面就簡單介紹一下各類密封材料的使用條件，以及常用的閥門類型。1、合成橡膠合成橡膠的耐油、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℃，橡膠用于公稱壓力PN≤1MPa的截止閥、閘閥、隔膜閥、蝶閥、止回閥、夾管閥等閥門的密封。2、尼龍尼龍具有摩擦系數(shù)小、耐腐蝕性好等特點。尼龍多用于溫度t≤90℃、公稱壓力PN≤32MPa的球閥、截止閥等，安徽德國真空管道蝶閥哪家好。3、聚四氟乙烯聚四氟乙烯多用于溫度t≤232℃、公稱壓力PN≤、閘閥、球閥等，安徽德國真空管道蝶閥哪家好。4、鑄鐵鑄鐵用于溫度t≤100℃、公稱壓力PN≤、煤氣和油類用的閘閥、截止閥、旋塞閥等。5、巴氏合金巴氏合金用于溫度t-70~150℃、公稱壓力PN≤。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽德國真空管道蝶閥哪家好" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494189453/4103674.png"></div><p> 閥門選型的要點 </p> <p> <br /> </p> <p> 1、明確閥門在設備或裝置中的用途 </p> <p> <br /> </p> <p> 確定閥門的工作條件：適用介質(zhì)的性質(zhì)、工作壓力、工作溫度和操縱控制方式等。 </p> <p> <br /> </p> <p> 2、正確選擇閥門的類型 </p> <p> <br /> </p> <p> 閥門型式的正確選擇是以設計者對整個生產(chǎn)工藝流程、操作工況的充分掌握為先決條件的，在選擇閥門類型時，設計人員應首先掌握每種閥門的結(jié)構(gòu)特點和性能。 </p> <p> <br /> </p> <p> 3、確定閥門的端部連接 </p> <p> <br /> </p> <p> 在螺紋連接、法蘭連接、焊接端部連接中，前兩種**常用。螺紋連接的閥門主要是公稱通徑在50mm以下的閥門，如果通徑尺寸過大，連接部的安裝和密封十分困難。 </p> <p> <br /> </p> <p> 法蘭連接的閥門，其安裝和拆卸都比較方便，但是較螺紋連接的閥門笨重，價格較高，故它適用于各種通徑和壓力的管道連接。 </p> <p> <br /> </p> <p> 焊接連接適用于較荷刻的條件下，比法蘭連接更為可靠。但是焊接連接的閥門拆卸和重新安裝都比較困難，所以它的使用于通常能長期可靠地運行，或使用條件荷刻、溫度較高的場合。 </p> <p> <br /> </p> <p> 4、閥門材質(zhì)的選擇 </p> <p> <br /> </p> <p> 選擇閥門的殼體、內(nèi)件和密封面的材質(zhì)，除了考慮工作介質(zhì)的物理性能（溫度、壓力）和化學性能（腐蝕性）外，還應掌握介質(zhì)的清潔程度（有無固體顆粒），除此之外，還要參照國家和使用部門的有關(guān)規(guī)定。 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽德國真空管道蝶閥哪家好" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749327031250/8086057.png"></div><p> <p> 國外閥門密封等級的選用 </p> 前蘇聯(lián)對閥門密封等級分類主要是20世紀50年代應用，隨著前蘇聯(lián)的解體，現(xiàn)大多數(shù)國家都不選用此密封等級分類，而是選用歐美標準的密 </p> <p> <br /> </p> <p> 封等級分類。歐洲標準EN 12266—1密封等級分類符合國際標準化組織標準ISO 5208的規(guī)定，但缺AA、CC和EE三個等級。ISO 5208與1999版相比，新增了AA、CC、E、EE、F和G六個等級。ISO 5208標準給出了與API 598和EN 12266標準幾個密封等級的比較。 </p> <p> <br /> </p> <p> ④。其他公稱尺寸密封等級的比較可按口徑計算泄漏量得出 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽德國真空管道蝶閥哪家好" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737890810547/4528489.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/36183.html</p></div></div></div></div></div><div id="pf95rfl" class="page-right twoColRt"><div id="p7pfdb9" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="bpfvbhn" 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配件哪家強信息推薦自業(yè)物資供應" 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