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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>河南RH真空管道蝶閥哪家好</p><p><span>***更新：</span>2020-05-28 09:20:28</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="iza8cgn" 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="ueg223a" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="vfcw3ls" class="box"><p><p> 不銹鋼870℃。其中鉛耐壓能力較差，鋁可耐64千克/平方厘米，其他材料可耐高壓。(7)金屬異性墊圈：透鏡墊圈：有自緊作用，使用于高壓閥門。橢圓形墊圈：也屬于高壓自緊墊圈。錐面雙墊圈：用于高壓內(nèi)自慎密封。此外，還有方形、菱形、三角形、齒形、燕尾形、B形、C形等，一般只高中壓閥門中使用，河南RH真空管道蝶閥哪家好。(8)金屬包皮墊圈：金屬既有***耐溫耐壓性能，又有***彈性。包皮材料有鋁、銅、低碳鋼、不銹鋼、蒙乃爾合金等。里面填充材料有石棉、聚四氟乙烯、玻璃纖維等。(9)波形墊圈：具有壓緊力小，密封效果好特點(diǎn)。常采用金屬與非金屬組合形式。(10)環(huán)繞糾纏墊圈：是把很薄金屬帶和非金屬帶緊貼一起，環(huán)繞糾纏成多層圓形，斷面呈海浪狀，有很好彈性和密封性。金屬帶可用08鋼、0Cr13、1Cr13、2Cr13、1Cr18Ni9Ti、銅、鋁、鈦、蒙乃爾合金等建造。非金屬帶材料有石棉，河南RH真空管道蝶閥哪家好、聚四氟乙烯等。以上，講述密封墊圈性能時，列舉了一些數(shù)字。必需說明，這些數(shù)字跟法蘭形式、介質(zhì)情況和安裝修理技術(shù)等有緊密親密關(guān)系，可以跨越，達(dá)不到，耐壓和耐溫性能，也是相互轉(zhuǎn)化，例如溫度高了，河南RH真空管道蝶閥哪家好，耐壓能力往往下降，這些細(xì)微問題，只能實(shí)踐中體味。四、閥門密封材料閥門密封材料是閥門密封的重要組成部分。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南RH真空管道蝶閥哪家好" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749328144532/3165155.png"></div><p> 真空閥門公稱通徑：(nominal diameter)，又稱平均外徑(mean outside diameter)，表示符號DN，就是各種管子與管路附件的通用口徑。同一公稱直徑的管子與管路附件均能相互連接，具有互換性.它不是實(shí)際意義上的管道外徑或內(nèi)徑，雖然其數(shù)值跟管道內(nèi)徑較為接近或相等，為了使管子、管件連接尺寸統(tǒng)一，采用公稱直徑（也稱公稱口徑、公稱通徑)。例如焊接鋼管按厚度可分為薄壁鋼管、普通鋼管和加厚鋼管。其公稱直徑不是外徑，也不是內(nèi)徑，而是近似普通鋼管內(nèi)徑的一個名義尺寸。每一公稱直徑，對應(yīng)一個外徑，其內(nèi)徑數(shù)值隨厚度不同而不同。公稱直徑可用公制mm表示，也可用英制in表示。管路附件也用公稱直徑表示，意義同有縫管。 </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南RH真空管道蝶閥哪家好" src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494296875/9390800.png"></div><p> 美國石油協(xié)會標(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(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，但按B．4所述的密封試驗，其泄漏量不能大于ISO 5208(1993)D級的二倍，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¨J?！币虼?，工程設(shè)計中有高于其標(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附加試驗要求中規(guī)定了在購方規(guī)定時制造廠要作的閥f J附加試驗要求。密封試驗分低壓和高壓氣體密封試驗，以惰性氣體作為試驗介質(zhì)的高壓密封試驗將取代液體上密封試驗和液體密封試驗。依據(jù)閥門的類型、口徑和壓力級別選擇密封試驗，可參考ISO 5208標(biāo)準(zhǔn)的規(guī)定。對于長輸管道GAl、工業(yè)管道GCl上的閥門建議選用低壓密封試驗，可以提高閥門的合格品率。選用高壓密封試驗時應(yīng)注意彈性密封閥門經(jīng)高壓密封試驗后，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="河南RH真空管道蝶閥哪家好" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494101563/8647630.png"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/66620.html</p></div></div></div></div></div><div id="fpkyk2g" class="page-right twoColRt"><div id="crdqcjq" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="cw7rnz3" 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)" 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