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tcPro"><section class="home-main container clearfix"><div id="bdp8kv4" class="twoCol"><div id="huv2gim" 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>?天津FSA真空管道蝶閥重量頂耕國際貿(mào)易供應(yīng)</p><div id="dcgaxl4" class="leftbox clearfix"><h1>天津FSA真空管道蝶閥重量頂耕國際貿(mào)易供應(yīng)</h1><div id="vijq3qs" class="proBig"><div id="9n8b7h4" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749325380860/6768130.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="4utug8s" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749325380860/6768130.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="4jpa7a0" 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>天津FSA真空管道蝶閥重量</p><p><span>***更新：</span>2020-05-30 11:26:40</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="sz32kba" 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(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="ub2tckh" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="pw8qxtc" class="box"><p><p> 閥門材料的選用原則閥門材料的選用原則主要包括：閥體材料選用、閥門內(nèi)件選用、閥座密封面――軟閥座、閥桿密封――逸散性排放、閥蓋墊片。閥門常用材料的性能本文介紹了閥門常用材料的性能，比如：鑄鐵、碳素鋼、不銹鋼、銅合金、鋁合金、鈦合金、鋯合金、陶瓷、玻璃鋼、塑料、襯里，天津FSA真空管道蝶閥重量。閥門連接端常見的幾種連接形式正確、合適地選擇閥門端部連接結(jié)構(gòu)，才能保證閥門順利安裝使用。閥門連接端連接形式通常分為：螺紋式、法蘭式、焊接式、卡箍及卡套式。閥門的幾種常用分類方法閥門的分類方法有很多種，分類方法不同，結(jié)果也不相同，本文講述了閥門的幾種常用分類方法。真空先導(dǎo)式真空安全閥設(shè)計本文主要討論了主安全閥的閥瓣設(shè)計思路，從選型分析到主安全閥閥瓣的設(shè)計、閥瓣活塞體的設(shè)計及閥瓣活塞體“O”形密封圈設(shè)計的優(yōu)點。放氣閥的工作原理及結(jié)構(gòu)示意圖放氣閥是向真空腔體內(nèi)導(dǎo)入氣體，以破壞真空的閥門(圖1)。針對超高真空系統(tǒng)，一般情況下導(dǎo)入干燥的氮氣，以避免真空腔體內(nèi)壁大量吸附水蒸氣。史上**全的閥門圖形符號及說明閥門圖形符號是對閥門簡單的圖形標(biāo)注，一般用于制圖等領(lǐng)域，天津FSA真空管道蝶閥重量。閥門圖形符號包含了球閥，天津FSA真空管道蝶閥重量、蝶閥、止回閥等多種常用閥門的符號信息。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="天津FSA真空管道蝶閥重量" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749325380860/6768130.png"></div><p> 其質(zhì)量直接影響閥門的使用壽命。合理地選擇閥門密封面的材料是提高閥門使用壽命的重要途徑之一。在閥門密封面材料選用時應(yīng)避免走入誤區(qū)。誤區(qū)1:閥門密封面材料的硬度高其耐磨損性能就好。實驗表明,閥門密封面材料的耐磨損性能是由其金屬材料的組織結(jié)構(gòu)所決定的。有些以奧氏體為基體加少量硬質(zhì)相結(jié)構(gòu)的金屬材料其硬度并不很高,但其耐磨損性能很好。閥門密封面具有一定的高硬度是為避免被介質(zhì)中硬雜物墊傷和劃傷。綜合考慮,硬度值HRC35~45為宜。誤區(qū)2:閥門密封面材料的價格高其性能就好。材料的價格是其本身的商品特性,而材料的使用性能是其物理特性,兩者沒有必然聯(lián)系。鈷基合金中金屬鈷來源于進(jìn)口,價格較高,因而鈷基合金材料價格就高。鈷基合金的特點是高溫耐磨性能好,而用在常溫、中溫工況,則價格/性能比較高。在閥門密封面材料選用時應(yīng)選擇價格/性能比較低的材料。誤區(qū)3:閥門密封面材料在某一強腐蝕性介質(zhì)中耐蝕性良好,就一定適應(yīng)其他腐蝕性介質(zhì)。金屬材料的耐腐蝕性有其復(fù)雜的機理,一種材料在某一強腐蝕介質(zhì)中耐蝕性能良好,而條件稍有變化,如溫度或介質(zhì)濃度等改變,則耐蝕性能即改變。對另一種腐蝕性介質(zhì),其耐蝕性能變化更大。金屬材料的耐腐蝕性只能通過實驗得知。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="天津FSA真空管道蝶閥重量" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749337275391/5992195.png"></div><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。(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。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、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，耐壓能力往往下降，這些細(xì)微問題，只能實踐中體味。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="天津FSA真空管道蝶閥重量" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737896738282/5305453.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/88465.html</p></div></div></div></div></div><div id="dfr8fhn" class="page-right twoColRt"><div id="lsjfw72" class="box01 margin10 clearfix"><h3><a 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