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src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737493554688/8379117.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="thxn33r" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737493554688/8379117.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="75hdrhf" 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>湖北鋼廠真空管道蝶閥等級(jí)</p><p><span>***更新：</span>2020-05-29 15:43:42</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="3z3vbrx" 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="pnd3lt3" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="h5ljhdb" class="box"><p><p> 其質(zhì)量直接影響閥門(mén)的使用壽命。合理地選擇閥門(mén)密封面的材料是提高閥門(mén)使用壽命的重要途徑之一。在閥門(mén)密封面材料選用時(shí)應(yīng)避免走入誤區(qū)。誤區(qū)1:閥門(mén)密封面材料的硬度高其耐磨損性能就好。實(shí)驗(yàn)表明,閥門(mén)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?shī)W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(mén)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，湖北鋼廠真空管道蝶閥等級(jí),硬度值HRC35~45為宜。誤區(qū)2:閥門(mén)密封面材料的價(jià)格高其性能就好。材料的價(jià)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(méi)有必然聯(lián)系。鈷基合金中金屬鈷來(lái)源于進(jìn)口,價(jià)格較高,因而鈷基合金材料價(jià)格就高。鈷基合金的特點(diǎn)是高溫耐磨性能好,而用在常溫、中溫工況,則價(jià)格/性能比較高。在閥門(mén)密封面材料選用時(shí)應(yīng)選擇價(jià)格/性能比較低的材料。誤區(qū)3:閥門(mén)密封面材料在某一強(qiáng)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(jī)理，湖北鋼廠真空管道蝶閥等級(jí),一種材料在某一強(qiáng)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，湖北鋼廠真空管道蝶閥等級(jí),則耐蝕性能即改變。對(duì)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(guò)實(shí)驗(yàn)得知。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北鋼廠真空管道蝶閥等級(jí)" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737493554688/8379117.png"></div><p> 金屬硬密封蝶閥作為一種用來(lái)實(shí)現(xiàn)管路系統(tǒng)通斷及流量控制的部件，已在石油、化工、冶金、水電等許多領(lǐng)域中得到極為很多地應(yīng)用。在已公知的蝶閥技術(shù)中，其密封形式多采用密封結(jié)構(gòu)，密封材料為橡膠、聚四氟乙烯等。由于結(jié)構(gòu)特征的限制，不適應(yīng)耐高溫、高壓及耐腐蝕、抗磨損等行業(yè)?，F(xiàn)有一種比較先進(jìn)的蝶閥是三偏心金屬硬密封蝶閥，閥體和閥座為連體構(gòu)件，閥座密封表面層堆焊耐溫、耐蝕合金材料。多層軟疊式密封圈固定在閥板上，這種蝶閥與傳統(tǒng)蝶閥相比具有耐高溫，操作輕便，啟閉無(wú)磨擦，關(guān)閉時(shí)隨著傳動(dòng)機(jī)構(gòu)的力矩增大來(lái)補(bǔ)償密封，提高了蝶閥的密封性能及延長(zhǎng)使用壽命的優(yōu)點(diǎn)。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北鋼廠真空管道蝶閥等級(jí)" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749325380860/6768130.png"></div><p> <br /> </p> <p> <br /> </p> <p> 通常，在節(jié)流、調(diào)節(jié)控制與泥漿介質(zhì)中，要求結(jié)構(gòu)長(zhǎng)度短，啟閉速度快（1/4轉(zhuǎn)）。低壓截止（壓差?。?，推薦選用蝶閥。 </p> <p> <br /> </p> <p> 在雙位調(diào)節(jié)、縮口地通道、低噪聲、有氣穴和氣化現(xiàn)象，向大氣少量滲漏，具有磨蝕性介質(zhì)時(shí)，可以選用蝶閥。在特殊工況條件下節(jié)流調(diào)節(jié)，或要求密封嚴(yán)格，或磨損嚴(yán)重、低溫（深冷）等工況條件下使用蝶閥時(shí)，需使用特殊設(shè)計(jì)金屬密封帶調(diào)節(jié)裝置地三偏心或雙偏心地**蝶閥。中線蝶閥適用于要求達(dá)到完全密封、氣體試驗(yàn)泄漏為零、壽命要求較高、工作溫度在-10度～150度的淡水、污水、海水、鹽水、蒸汽、天然氣、食品、藥品、油品和各種酸堿及其他管路上。軟密封偏心蝶閥適用于通風(fēng)除塵管路的雙向啟閉及調(diào)節(jié)，很多用于冶金、輕工、電力、石油化工系統(tǒng)的煤氣管道及水道等。金屬對(duì)金屬線密封雙偏心蝶閥適用于城市供熱、供氣、供水等煤氣、油品、酸堿等管路，作為調(diào)節(jié)和節(jié)流裝置。金屬對(duì)金屬面密封三偏心蝶閥除作為大型變壓吸附（PSA）氣體分離裝置程序控制閥使用外，還可很多用于石油、石化、化工、冶金、電力等領(lǐng)域，時(shí)閘閥、截止閥的良好替代產(chǎn)品 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北鋼廠真空管道蝶閥等級(jí)" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494101563/8647630.png"></div></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/79927.html</p></div></div></div></div></div><div id="jpnt5zx" class="page-right twoColRt"><div id="zzx3hp7" class="box01 margin10 clearfix"><h3><a 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