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<meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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src="https://tyunfile.71360.com/UploadFile/shdatian/637343241974296875/6282454.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="uyprt37" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shdatian/637343241974296875/6282454.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3txtfwn" 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>寶山區(qū)自動再循環(huán)閥,自動再循環(huán)閥</p><p><span>***更新：</span>2021-01-29 03:12:45</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="3jam3co" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海大田閥門管道工程有限公司</a></p><p><span>聯(lián)系人：</span>余璐辰</p><p><span>郵箱: </span>business@dtjt.com</p><p><span>電話: </span>18621060309</p><p><span>傳真: </span>21_</p><p><span>網(wǎng)址: </span>https://www.dtjt.com</p><p><span>手機: </span>21-68106370</p><p><span>地址: </span>祝橋鎮(zhèn)工業(yè)城</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="twievhd" class="page-proshow02"><p class="title">詳細說明</p><div id="ngcofmi" class="box"><p><p style="text-indent:25px"> 自動再循環(huán)閥是給水泵的重要設備，與125、200、300、600MW機組鍋爐給水泵配套使用。在電廠運行過程中，給水泵將鍋爐給水經(jīng)除氧器加壓后送往高壓加熱器，進入鍋爐。當給水流量由于機組運行工況所限低于某一小值時，將導致給水泵內(nèi)介質(zhì)汽化而使設備無法工作甚至損壞。自動再循環(huán)閥就是當給水流量減小流量（給水泵的流量在任何工況下都不得小于這一規(guī)定的安全流量值）時，立即打開，介質(zhì)經(jīng)控制閥回到除氧器，保證給水泵的安全運行；當給水流量達到一定量時，小流量控制閥關閉，系統(tǒng)進入正常工作。運行時給水泵出口壓力很高，寶山區(qū)自動再循環(huán)閥，而除氧器壓力很低（0.8MPa以下），寶山區(qū)自動再循環(huán)閥，所以，寶山區(qū)自動再循環(huán)閥，自動再循環(huán)閥須承受很高的壓差。自動再循環(huán)閥是一個局部阻力可以變化的節(jié)流元件.寶山區(qū)自動再循環(huán)閥</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寶山區(qū)自動再循環(huán)閥,自動再循環(huán)閥" src="https://tyunfile.71360.com/UploadFile/shdatian/637343241974296875/6282454.png"></div><p style="text-indent:25px"> 自動再循環(huán)閥常見毛病及去掉方法：裝置前道確認產(chǎn)品功能和介質(zhì)流向箭頭是否與運動工況相符，并將閥門內(nèi)腔插洗潔凈，不允許在密封圈和蝶板上有附有雜質(zhì)異物，未清洗前絕不允許封閉蝶板，以免損壞密封圈。碟板裝置配套法蘭主張采用碟閥專門用法蘭，裝置在管道中的方位，佳方位為立裝，但不能倒裝。運用中需要調(diào)節(jié)流量，有蝸輪箱進行操控。開、閉次數(shù)較多的碟閥，在二個月左右時刻，翻開蝸輪箱蓋，查看黃油是否正常，應堅持適量的黃油。查看各聯(lián)接部位要求壓緊，即確保填料的蜜蜂性，又可確保閥桿轉(zhuǎn)動靈活。自動再循環(huán)閥產(chǎn)品不適合裝置于管路結(jié)尾，如必須裝置于管路結(jié)尾，需采納配裝出口法蘭，避免密封圈積壓，過位。閥桿裝置運用反應定時查看閥門運用作用，發(fā)現(xiàn)毛病及時掃除。自動再循環(huán)閥初度運轉(zhuǎn)時，要供認電動機滾動的方向是不是精確。江蘇流量保護閥品牌哪家好自動再循環(huán)閥長時間使用后要進行清潔工作.</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寶山區(qū)自動再循環(huán)閥,自動再循環(huán)閥" src="https://tyunfile.71360.com/UploadFile/shdatian/637343241537685546/5558241.png"></div><p style="text-indent:25px"> 給水泵出口至除氧器（或冷凝器）水箱之間安裝再循環(huán)系統(tǒng)，在自動再循環(huán)閥剛啟動或在給水量小到一定程度時，可打開再循環(huán)系統(tǒng)。將一部分水返回除氧器水箱，以保證有一定的水量（一般約為額定流量的30%）通過水泵，而不致使泵內(nèi)水溫升高而汽化。而當給水量處于正常條件下時，關閉再循環(huán)系統(tǒng)。以往的控制方式是由復雜的控制系統(tǒng)組成泵的保護及控制系統(tǒng)。再循環(huán)系統(tǒng)由小流量閥、止回閥、流量測量系統(tǒng)組成。系統(tǒng)中流量測量系統(tǒng)確定何時開啟或關閉再循環(huán)系統(tǒng)；</p><p style="text-indent:25px"> 自動再循環(huán)閥使用場景：自動再循環(huán)閥適用于流量調(diào)節(jié)。由于自動再循環(huán)閥在管路中的壓力損失比較大，還應考慮關閉時蝶板承受管道介質(zhì)壓力的堅固性。此外，還必須考慮在高溫下彈性閥座材料所承受工作溫度的限制。自動再循環(huán)閥的結(jié)構(gòu)長度和總體高度較小，開啟和關閉速度快，且具有良好的流體控制特性，自動再循環(huán)閥的結(jié)構(gòu)原理適合制作大口徑閥門。當要求自動再循環(huán)閥作控制流量使用時，重要的是正確選擇自動再循環(huán)閥的尺寸和類型，使之能恰當?shù)?、有效地工作。通常，在?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?。?，推薦選用自動再循環(huán)閥。自動再循環(huán)閥是用圓盤式啟閉件往復回轉(zhuǎn)90°左右來開啟、關閉或調(diào)節(jié)介質(zhì)流量的一種閥門.</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寶山區(qū)自動再循環(huán)閥,自動再循環(huán)閥" src="https://tyunfile.71360.com/UploadFile/shdatian/637343240684023437/3078406.png"></div><p style="text-indent:25px"> 自動再循環(huán)閥修護的主要方面有：1、自動再循環(huán)閥液壓設備設備完成后，按照闡明書給設備增加必定的油。新品油經(jīng)過過濾才干夠參與油箱。2、初度運轉(zhuǎn)時，要供認電動機滾動的方向是不是精確3、初度運轉(zhuǎn)后，蓄能器里的壓力要用氮氣，必定不要用氧氣，這么易發(fā)作。4、應經(jīng)常查看機器的各個零件是不是正常和損壞，若不正常要及時交換，防止發(fā)作事端。5、有缺點指示亮、漏油等異?，F(xiàn)象發(fā)作，要及時的停止查看，假設發(fā)現(xiàn)問題，及時停止修理。這便是自動再循環(huán)閥的修護要點。連續(xù)循環(huán)系統(tǒng)泵的小需求流量與系統(tǒng)的工藝流量變化無關。黃山自動再循環(huán)閥價格哪家便宜</p><p style="text-indent:25px">自動再循環(huán)閥可以設置自動控制.寶山區(qū)自動再循環(huán)閥</p><p style="text-indent:25px"> 自動再循環(huán)閥閥瓣上部和閥蓋下部加工有導向套簡，閥瓣導向簡可在閥盞導向簡內(nèi)自由升降，當介質(zhì)順流時，閥瓣靠介質(zhì)推力開啟，當介質(zhì)停流時，閥瓣靠自垂降落在閥座上，起阻止介質(zhì)逆流作用。直通式升降自動再循環(huán)閥介質(zhì)進出口通道方向與閥座通道方向垂直;立式升降式自動再循環(huán)閥，其介質(zhì)進出口通道方向與閥座通道方向相同,其流動阻力較直通式小。自動再循環(huán)閥性能優(yōu)勢：自動再循環(huán)閥包括回流的減壓設施，使高壓介質(zhì)經(jīng)多次小通徑繞流，消耗大量的能量，而降低壓力。寶山區(qū)自動再循環(huán)閥</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3057562.html</p></div></div></div></div></div><div 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