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clearfix"><h1>山西原裝真空管道蝶閥口徑頂耕國際貿(mào)易供應(yīng)</h1><div id="8kzpg5d" class="proBig"><div id="73kr7qu" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749337275391/5992195.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="8dbmdm8" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749337275391/5992195.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="oofdrsz" 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>山西原裝真空管道蝶閥口徑</p><p><span>***更新：</span>2020-05-24 14:29:20</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="l2dzqf8" 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(jī): </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="ctamypb" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="lk3rhnj" class="box"><p><p> 真空閥門是指閥門內(nèi)腔為真空狀態(tài)，通常叫負(fù)壓，內(nèi)腔壓力低于大氣壓，用于真空管道系統(tǒng)的閥門，有真空球閥，真空蝶閥，真空隔膜閥等。介質(zhì)為高純度。 </p> <p> 球閥、閘閥、截止閥等等均能生產(chǎn)成真空閥和普通常規(guī)閥門。從外形上無區(qū)別，山西原裝真空管道蝶閥口徑，在閥門連接部位設(shè)計(jì)上是有分別的，只是細(xì)節(jié)上的問題。 </p> <p> 真空閥門相對于正壓閥門具有下列特點(diǎn)： </p> <p> 壓力低于大氣壓，而閥瓣上的壓降不能超過1公斤力/厘米2。介質(zhì)的工作溫度取決于使用裝置的工藝過程，山西原裝真空管道蝶閥口徑。溫度一般不超過-70 ~ +150℃的范圍。 </p> <p> 對這類閥門**基本的要求是保證連接的高度密封性和結(jié)構(gòu)與墊片材料的致密性。 </p> <p> 按介質(zhì)壓力真空閥門可分成四組： </p> <p> 1）低真空閥門：介質(zhì)壓力p=760~1毫米汞柱； </p> <p> 2）中真空閥門：p=1×10-3 毫米汞柱。 </p> <p> 3）高真空閥門：p=1×10-4 ~1×10-7 毫米汞柱； </p> <p> 4）超高真空閥門：p≤1×10-8 毫米汞柱。 </p> <p> 真空閥門很多采用的的閥桿作直線運(yùn)動的真空波紋管截止閥。閘閥卻受到較大的限制，但大通徑來說，山西原裝真空管道蝶閥口徑，可用的還有球閥、柱塞閥和蝶閥。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西原裝真空管道蝶閥口徑" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749337275391/5992195.png"></div><p> 優(yōu)點(diǎn) </p> <p> 1、啟閉方便迅速、省力、流體阻力小，可以經(jīng)常操作。 </p> <p> 2、結(jié)構(gòu)簡單，外形尺寸小，結(jié)構(gòu)長度短，體積小，重量輕，適用于大口徑的閥門。 </p> <p> 3、可以運(yùn)送泥漿，在管道口積存液體**少。 </p> <p> 4、低壓下，可以實(shí)現(xiàn)良好的密封。 </p> <p> 5、調(diào)節(jié)性能好。 </p> <p> 6、全開時(shí)閥座通道有效流通面積較大，流體阻力較小。 </p> <p> 7、啟閉力矩較小，由于轉(zhuǎn)軸兩側(cè)蝶板受介質(zhì)作用基本相等，而產(chǎn)生轉(zhuǎn)矩的方向相反，因而啟閉較省力。 </p> <p> 8、密封面材料一般采用橡膠、塑料、故低壓密封性能好。 </p> <p> 9、安裝方便。 </p> <p> 10、操作靈活省力，可選擇手動、電動、氣動、液壓方式。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西原裝真空管道蝶閥口徑" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737493554688/8379117.png"></div><p> 美國石油協(xié)會標(biāo)準(zhǔn)API 6D(ISO14313)《石油和天然氣工業(yè)一管線輸送系統(tǒng)一管線閥門》對閥門泄漏量的接收準(zhǔn)則是：“軟密封閥門和油封旋塞閥的泄漏量不得超過ISO 5208 A級(不得有可見泄漏)，金屬閥座閥門的泄漏量不得超過ISO 5208(1993)D級，但按B．4所述的密封試驗(yàn)，其泄漏量不能大于ISO 5208(1993)D級的二倍，除另有規(guī)定?！睒?biāo)準(zhǔn)中注：“特殊的應(yīng)用可要求泄漏量少于ISO 5208(1993)D級¨J?！币虼耍こ淘O(shè)計(jì)中有高于其標(biāo)準(zhǔn)的泄漏量要求，應(yīng)在訂貨合同中給出。API 6D--2008附錄B附加試驗(yàn)要求中規(guī)定了在購方規(guī)定時(shí)制造廠要作的閥f J附加試驗(yàn)要求。密封試驗(yàn)分低壓和高壓氣體密封試驗(yàn)，以惰性氣體作為試驗(yàn)介質(zhì)的高壓密封試驗(yàn)將取代液體上密封試驗(yàn)和液體密封試驗(yàn)。依據(jù)閥門的類型、口徑和壓力級別選擇密封試驗(yàn)，可參考ISO 5208標(biāo)準(zhǔn)的規(guī)定。對于長輸管道GAl、工業(yè)管道GCl上的閥門建議選用低壓密封試驗(yàn)，可以提高閥門的合格品率。選用高壓密封試驗(yàn)時(shí)應(yīng)注意彈性密封閥門經(jīng)高壓密封試驗(yàn)后，可能降低其在低壓工況的密封性能。應(yīng)根據(jù)介質(zhì)使用工況實(shí)際條件，合理地選用閥門密封試驗(yàn)要求，可以有效地降低閥門的生產(chǎn)成本。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西原裝真空管道蝶閥口徑" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749327031250/8086057.png"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/28757.html</p></div></div></div></div></div><div id="b2kmdpq" class="page-right twoColRt"><div id="8mse3e8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="svcfmcn" 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(qiáng) 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(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="ybn3htk" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" alt="寧波寧海直接考A2有幾個(gè)科目真誠推薦寧波助學(xué)商務(wù)信息咨詢供應(yīng)" class="vcenter" 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