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class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="tikro7k" class="smallimg"><div><p class="pic"><img src="https://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="e8o3uhe" 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>江蘇官方真空管道蝶閥材料</p><p><span>***更新：</span>2020-06-03 15:15:19</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="8y23ols" 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="3ba2gy3" class="page-proshow02"><p class="title">詳細說明</p><div id="cb2oa8x" class="box"><p><p> 金屬硬密封蝶閥作為一種用來實現(xiàn)管路系統(tǒng)通斷及流量控制的部件，已在石油、化工，江蘇官方真空管道蝶閥材料、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，江蘇官方真空管道蝶閥材料，啟閉無磨擦，江蘇官方真空管道蝶閥材料，關(guān)閉時隨著傳動機構(gòu)的力矩增大來補償密封，提高了蝶閥的密封性能及延長使用壽命的優(yōu)點。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇官方真空管道蝶閥材料" src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737493554688/8379117.png"></div><p> 1、配管上的法蘭面與配管中心線的垂直度及法蘭螺栓孔的誤差應(yīng)在允許值的范圍內(nèi)。閥門和配管中心線要取得一致后，在進行安裝。 2、在緊固螺栓時，要使用與螺母相匹配的扳手，當(dāng)使用油壓，風(fēng)動工具進行緊固時，注意不要超過規(guī)定的力矩。 3、連接兩個法蘭時，首先要使法蘭密封面與墊片均勻壓緊，由此保證靠同等的螺栓應(yīng)力對法蘭進行連接。 4、法蘭的緊固要避免用力不均，應(yīng)按照對稱、交義的方向順序旋緊。 5、法蘭安裝后，要確認所有的螺栓螺母的緊固均勻。 6、螺栓和螺母的緊固，為了防止震動造成的松動，要使用墊圈。為了避免高溫時螺紋間的粘連，安裝時螺紋部位應(yīng)涂防粘劑。 7、用于300℃以上的高溫閥門，在溫度上升后，必須對法蘭連接螺栓、閥蓋緊固螺栓、壓力密封以及填料壓蓋螺栓再次旋緊。 8、低溫用閥門時在安裝時是處于大氣溫度的狀態(tài)下，由于形成溫差，法蘭、墊片、螺栓以及螺母等發(fā)生收縮，又由于這些零部件的材質(zhì)不相同 9、各自的線膨脹系數(shù)也不同，形成了非常容易泄漏的環(huán)境條件。從這種客觀情況出發(fā)，在大氣溫度下緊固螺栓時，必須采用考慮了低溫時各零部件收縮因素的力矩。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇官方真空管道蝶閥材料" src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494189453/4103674.png"></div><p> 確定調(diào)節(jié)閥口徑的七個步驟是什么？ </p> <p> <br /> </p> <p> 1）確定計算流量——Qmax、Qmin </p> <p> 2）確定計算壓差——根據(jù)系統(tǒng)特點選定阻力比S值，然后確定計算（閥全開時）壓差； </p> <p> 3）計算流量系數(shù)——選擇合適的計算公式圖表或軟件求KV的max和min； </p> <p> 4）KV值選取——根據(jù)KV的max值在所選產(chǎn)品系列中**接近一檔的KV，得到初選口徑； </p> <p> 5）開度驗算——要求Qmax時≯90％閥開度；Qmin時≮10％閥開度； </p> <p> 6）實際可調(diào)比驗算——一般要求應(yīng)≮10；R實際＞R要求 </p> <p> 7）口徑確定——若不合格重選選KV值，再驗證。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇官方真空管道蝶閥材料" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494296875/9390800.png"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/134831.html</p></div></div></div></div></div><div id="8ryace4" class="page-right twoColRt"><div id="hw9u3l3" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="fzyfhey" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="eoie2vu" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img 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