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class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737896250000/4170655.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="zblcqhk" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737896250000/4170655.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="61xdjxo" 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>福建官方真空管道蝶閥等級(jí)</p><p><span>***更新：</span>2020-06-05 07:12:06</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="ekf9msg" 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="fxo96x6" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="y6bllku" class="box"><p><p> 它擔(dān)任閥門密封直接接觸的面。那閥門密封材料都有哪些呢，我們知道閥門密封圈材料有金屬和非金屬兩大類。閥門密封材料是閥門密封的重要組成部分，它擔(dān)任閥門密封直接接觸的面。那閥門密封材料都有哪些呢，我們知道閥門密封圈材料有金屬和非金屬兩大類。下面就簡(jiǎn)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，福建官方真空管道蝶閥等級(jí)、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(diǎn)。尼龍多用于溫度t≤90℃、公稱壓力PN≤32MPa的球閥、截止閥等。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。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，福建官方真空管道蝶閥等級(jí)、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≤。6銅合金銅合金常用材料有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t≤200℃、公稱壓力PN≤，福建官方真空管道蝶閥等級(jí)，常用于閘閥、截止閥、止回閥、旋塞閥等。7鉻不銹鋼鉻不銹鋼常用牌號(hào)有2Cr13、3Cr13經(jīng)調(diào)質(zhì)處理，耐腐蝕性能好。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="福建官方真空管道蝶閥等級(jí)" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737896250000/4170655.jpg"></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(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、聚四氟乙烯等。以上，講述密封墊圈性能時(shí)，列舉了一些數(shù)字。必需說(shuō)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(wèn)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="福建官方真空管道蝶閥等級(jí)" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749325380860/6768130.png"></div><p> 密封面是閥門**關(guān)鍵的工作面，密封面質(zhì)量的好壞關(guān)系到閥門的使用壽命，通常密封面材料要考慮耐腐蝕，耐擦傷，耐沖蝕，抗氧化等因素。通常分兩大類：（一）軟質(zhì)材料1、橡膠（包括丁睛橡膠，氟橡膠等）2、塑料（聚四氟乙烯，尼龍等）（二）硬密封材料1、銅合金（用于低壓閥門）2、鉻不銹鋼（用于普通高中壓閥門）3、司太立合金（用于高溫高壓閥門及強(qiáng)腐蝕閥門）4、鎳基合金（用于腐蝕性介質(zhì)）閥桿材料閥桿在閥門開(kāi)啟和關(guān)閉過(guò)程中，承受拉、壓和扭轉(zhuǎn)作用力，并與介質(zhì)直接接觸，同時(shí)和填料之間還有相對(duì)的摩擦運(yùn)動(dòng)，因此閥桿材料必須保證在規(guī)定溫度下有足夠的強(qiáng)度和沖擊韌性，有一定的耐腐蝕性和抗擦傷性，以及良好的工藝性。常用的閥桿材料有以下幾種。一、碳素鋼用于低壓和介質(zhì)溫度不超過(guò)300℃的水、蒸汽介質(zhì)時(shí)，一般選用A5普通碳素鋼。用于中壓和介質(zhì)溫度不超過(guò)450℃的水、蒸汽介質(zhì)時(shí)，一般選用35質(zhì)量碳素鋼。二、合金鋼用于中壓和高壓，介質(zhì)溫度不超過(guò)450℃的水、蒸汽、石油等介質(zhì)時(shí)，一般選用40Cr（鉻鋼）。用于高壓、介質(zhì)溫度不超過(guò)540℃的水、蒸汽等介質(zhì)時(shí)，可選用38CrMoALA滲氮鋼。用于高壓、介質(zhì)溫度不超過(guò)570℃的蒸汽介質(zhì)時(shí)，一般選用25Cr2MoVA鉻鉬釩鋼。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="福建官方真空管道蝶閥等級(jí)" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737496982422/7639979.png"></div></p><br /><p>文章來(lái)源地址: 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