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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>?福建煉鋼廠真空管道蝶閥等級頂耕國際貿(mào)易供應</p><div id="hrebsuw" class="leftbox clearfix"><h1>福建煉鋼廠真空管道蝶閥等級頂耕國際貿(mào)易供應</h1><div id="laxjgs8" class="proBig"><div id="bameqse" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494296875/3009218.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="o3m2c2l" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494296875/3009218.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="fu3umdk" 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)品關鍵詞：</span>福建煉鋼廠真空管道蝶閥等級</p><p><span>***更新：</span>2020-05-24 10:32:34</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="uewi3o2" 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="iholkmt" class="page-proshow02"><p class="title">詳細說明</p><div id="gqszw88" class="box"><p><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)長度短，啟閉速度快（1/4轉(zhuǎn)）。低壓截止（壓差小），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，可以選用蝶閥。在特殊工況條件下節(jié)流調(diào)節(jié)，或要求密封嚴格，或磨損嚴重，福建煉鋼廠真空管道蝶閥等級，福建煉鋼廠真空管道蝶閥等級、低溫（深冷）等工況條件下使用蝶閥時，需使用特殊設計金屬密封帶調(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到完全密封、氣體試驗泄漏為零、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，福建煉鋼廠真空管道蝶閥等級、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、電力等領域，時閘閥、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="福建煉鋼廠真空管道蝶閥等級" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494296875/3009218.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="福建煉鋼廠真空管道蝶閥等級" src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494189453/4103674.png"></div><p> 盤根應逐圈安放壓緊，接頭應成30℃或45℃；3、使用期過長、老化、損壞的填料應及時更換；4、閥桿彎曲、磨損后應進矯直、修復，對損壞嚴重的應及時更換；5、填料應按規(guī)定的圈數(shù)安裝，壓蓋應對稱均勻地把緊，壓套應有5mm以上的預緊間隙；6、損壞的壓蓋、螺栓及其他部件，應及時修復或更換；7、應遵守操作規(guī)程，除撞擊式手輪外，以勻速正常力量操作；8、應均勻?qū)ΨQ擰緊壓蓋螺栓，壓蓋與閥桿間隙過小，應適當增大其間隙；壓蓋與閥桿間隙過大，應予更換。密封面的泄露原因：1、密封面研磨不平，不能形成密合線；2、閥桿與關閉件的連接處頂心懸空、不正或磨損；3、閥桿彎曲或裝配不正，使關閉件歪斜或不逢中；4、密封面材質(zhì)量選用不當或沒有按工況條件選用閥。維護方法：1、按工況條件正確選用顛墊片的材料和型式；2、精心調(diào)節(jié)，平穩(wěn)操作；3、應均勻?qū)ΨQ地擰螺栓，必要時應使用扭力扳手，預緊力應符合要求，不可過大或小。法蘭和螺紋連接處應有一定的預緊間隙；4、墊片裝配應逢中對正，受力均勻，墊片不允許搭接和使用雙墊片；5、靜密封面腐蝕、損壞加工、加工質(zhì)量不高，應進行修理、研磨，進行著色檢查，使靜密封面符合有關要求；6、安裝墊片時應注意清潔，密封面應用煤油清。</p><div 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