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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>南昌閥桿閥座大修,閥座</p><p><span>***更新：</span>2021-01-21 03:14:29</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="hvxzbif" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海含商建設(shè)工程有限公司</a></p><p><span>聯(lián)系人：</span>朱瑩</p><p><span>郵箱: </span>Irene_zy516@163.com</p><p><span>電話: </span>13918191286</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://shhanshang.shop.88360.com</p><p><span>手機(jī): </span>021-58210069</p><p><span>地址: </span>上海市崇明區(qū)新河鎮(zhèn)新申路921弄2號(hào)L區(qū)228室(上海富盛經(jīng)濟(jì)開(kāi)發(fā)區(qū))</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="3tli3y7" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="72olnuw" class="box"><p><p style="text-indent:25px">閥座能耐濃酸、濃堿、強(qiáng)氧化劑(如王水)和任何濃度沸騰的氫氟酸等介質(zhì)。聚三氟氯乙烯：聚三氟氯乙烯(PCTFE-F3)具有優(yōu)良的耐寒性，強(qiáng)度和硬度高，尺寸穩(wěn)定性好，無(wú)冷流傾向。使用溫度在-195~120°C，密度為21g/cm3，導(dǎo)熱系數(shù)為0058W/(mc)，線膨脹系數(shù)為(415~710)乘以10-5/°C，抗拉強(qiáng)度為35"40MPa，彈性模量為1300MPa，抗壓強(qiáng)度為50~70MPa，彎曲強(qiáng)度為70MPa。能耐較高溫下的無(wú)機(jī)酸、較低溫度下的鹽溶液強(qiáng)氧化劑，南昌閥桿閥座大修，南昌閥桿閥座大修，也能耐室溫下的大多數(shù)有機(jī)介質(zhì)，南昌閥桿閥座大修。球閥閥座的密封原理依其結(jié)構(gòu)而異常用的閥座結(jié)構(gòu)可分為固定閥座浮動(dòng)球體與浮動(dòng)閥座固定球體兩大類。聚三氟氯乙烯閥座線膨脹系數(shù)為(415~710)乘以10-5/°C,抗拉強(qiáng)度為35"40MPa。南昌閥桿閥座大修</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南昌閥桿閥座大修,閥座" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408581930586981/8695791.png"></div><p style="text-indent:25px">閥座施工、安裝要點(diǎn)：安裝位置、高度、進(jìn)出口方向有必要契合規(guī)劃要求，注意介質(zhì)活動(dòng)的方向應(yīng)與閥座體所標(biāo)箭頭方向一致，連接應(yīng)結(jié)實(shí)緊密。閥座安裝前有必要進(jìn)行外觀檢查，閥座的銘牌應(yīng)契合現(xiàn)行標(biāo)準(zhǔn)《通用閥座標(biāo)志》GB12220的規(guī)定。關(guān)于工作壓力大于1.0MPa及在主干管上起到切斷作用的閥座，安裝前應(yīng)進(jìn)行強(qiáng)度和緊密性能實(shí)驗(yàn)，合格后方準(zhǔn)使用。強(qiáng)度實(shí)驗(yàn)時(shí)，實(shí)驗(yàn)壓力為公稱壓力的1.5倍，持續(xù)時(shí)刻不少于5min，閥座殼體、填料應(yīng)無(wú)滲漏為合格。緊密性實(shí)驗(yàn)時(shí)，實(shí)驗(yàn)壓力為公稱壓力的1.1倍；實(shí)驗(yàn)持續(xù)的時(shí)刻契合GB50243的。南昌閥桿閥座大修彈性閥座需要借助于彈性元件。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南昌閥桿閥座大修,閥座" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408581913281946/7371774.png"></div><p style="text-indent:25px">儀表截止閥閥座密封面的加工方法：在待加工閥門(mén)閥座密封面粗加工后，將所述的待加工閥門(mén)和本精加工裝置的主軸分別固定，沿待加工閥門(mén)閥座密封面軸向進(jìn)給所述精加工裝置的主軸，當(dāng)滾柱與待加工閥門(mén)閥座密封面貼合后，使待加工閥門(mén)閥座密封面和所述精加工裝置的主軸產(chǎn)生相對(duì)轉(zhuǎn)動(dòng)，通過(guò)所述精加工裝置的滾柱對(duì)待加工閥門(mén)閥座密封面滾壓精加工，加工時(shí)，主軸的轉(zhuǎn)速為每分鐘100～1000轉(zhuǎn)，滾壓深度t＝001～002mm。產(chǎn)品加工現(xiàn)場(chǎng)如圖3所示。本閥門(mén)閥座密封面精加工裝置結(jié)構(gòu)簡(jiǎn)單，加工時(shí)間短，操作方便，閥門(mén)閥座密封面粗加工后，用滾壓頭一次精軋，10s左右可以完成。</p><p style="text-indent:25px">閥座密度為15g/cm3，導(dǎo)熱系數(shù)為025W/(m#c)，線膨脹系數(shù)約為105×10-5/℃，抗拉強(qiáng)度為196MPa，彈性模量為1300MPa，抗壓強(qiáng)度為310MPa，彎曲強(qiáng)度為310MPa，耐化學(xué)性能良好，耐弱酸、弱堿和一般溶液，耐油性能優(yōu)異。對(duì)位聚苯：對(duì)位聚苯(PPL)具有耐高溫性，耐化學(xué)腐蝕性，抗溶劑性，自潤(rùn)滑性，耐輻射性，低摩擦系數(shù)(013)等特點(diǎn)。密度為2g/cm3，線膨脹系數(shù)約為51×10-5/℃，硬度為80HS，抗拉強(qiáng)度為16MPa，抗壓強(qiáng)度為48MPa，彎曲強(qiáng)度為28MPa。能耐硫酸、氫氟酸等強(qiáng)酸強(qiáng)堿的腐蝕。聚醚醚酮：聚醚醚酮(PEEK)具有熱固性塑料的耐熱性，化學(xué)穩(wěn)定性和熱塑性塑料的成型加工性能，連續(xù)使用溫度可達(dá)240℃以上，玻璃纖維增強(qiáng)可達(dá)300℃以上，密度為13g/cm3，抗拉強(qiáng)度為162MPa，彎曲強(qiáng)度為233MPa。軟閥座粘結(jié)到金屬零件上是一種辦法，但不能完全解決問(wèn)題。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南昌閥桿閥座大修,閥座" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408581774717450/7860008.png"></div><p style="text-indent:25px">閥座處于徹底開(kāi)啟方位時(shí)，閥板厚度是介質(zhì)流經(jīng)閥座體時(shí)的阻力，因而通過(guò)該閥座所產(chǎn)生的壓力降很小，故具有較好的流量控制特性。閥座有彈密封和金屬的密封兩種密封型式。彈性密封閥座，密封圈可以鑲嵌在閥座體上或附在閥板周邊。采用金屬密封的閥座一般比彈性密封的閥座壽命長(zhǎng)，但很難做到徹底密封。金屬密封能習(xí)慣較高的工作溫度，彈性密封則具有受溫度限制的缺點(diǎn)。如果要求閥座作為流量控制運(yùn)用，主要的是正確選擇閥座的尺度和類型。閥座的結(jié)構(gòu)原理特別適合制作大口徑閥座。閥座不僅在石油、煤氣、化工、水處理等一般工業(yè)上得到普遍應(yīng)用，并且還應(yīng)用于熱電站的冷卻水系統(tǒng)。聚四氟乙烯閥座線膨脹系數(shù)為(10~15)乘以10-5/C,抗拉強(qiáng)度為10~30MPa。南昌閥桿閥座大修</p><p style="text-indent:25px">常用的閥座結(jié)構(gòu)可分為固定閥座浮動(dòng)球體與浮動(dòng)閥座固定球體兩大類。南昌閥桿閥座大修</p><p style="text-indent:25px">閥座在使用時(shí)的注意事項(xiàng)：薄膜式閥座，適用于低壓、中壓、中小口徑的蒸汽或水等介質(zhì)；閥座進(jìn)口壓力的波動(dòng)應(yīng)控制在進(jìn)口壓力給定值的80%～105%，如超過(guò)該范圍，減壓前期的性能會(huì)受影響；通常閥座的閥座后壓力應(yīng)小于閥座前壓力的0.5倍；閥座的每一檔彈簧只在一定的出口壓力范圍內(nèi)適用，超出范圍應(yīng)更換彈簧；在介質(zhì)工作溫度比較高的場(chǎng)合，一般選用先導(dǎo)活塞式閥座或先導(dǎo)波紋管式閥座；介質(zhì)為空氣或水（液體）的場(chǎng)合，一般宜選用直接作用薄膜式閥座或先導(dǎo)薄膜式閥座；介質(zhì)為蒸汽的場(chǎng)合，宜選用先導(dǎo)活塞式或先導(dǎo)波紋管式閥座；為了操作、調(diào)整和維修的方便，閥座一般應(yīng)安裝在水平管道上。南昌閥桿閥座大修</p><p style="text-indent:25px">上海含商建設(shè)工程有限公司是一家市政公用工程，管道工程，機(jī)電設(shè)備安裝、維修（除特種設(shè)備），化工產(chǎn)品及原料（除危險(xiǎn)化學(xué)品、監(jiān)控化學(xué)品、煙花爆竹、民用物品、易制毒化學(xué)品）、儀器儀表、五金交電、橡塑制品、建筑材料、裝潢材料、電子產(chǎn)品、日用百貨的銷售，機(jī)械設(shè)備技術(shù)領(lǐng)域內(nèi)的技術(shù)開(kāi)發(fā)、技術(shù)轉(zhuǎn)讓、技術(shù)咨詢和技術(shù)服務(wù)。的公司，致力于發(fā)展為創(chuàng)新務(wù)實(shí)、誠(chéng)實(shí)可信的企業(yè)。上海含商建設(shè)深耕行業(yè)多年，始終以客戶的需求為向?qū)?，為客戶提?**的維修高壓主汽門(mén)、高壓調(diào)門(mén)，維修中壓主汽門(mén)、中壓調(diào)門(mén)，閥座的車削、堆焊、補(bǔ)焊，熱處理、研磨。上海含商建設(shè)致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對(duì)用戶產(chǎn)品上的貼心，為用戶帶來(lái)良好體驗(yàn)。上海含商建設(shè)始終關(guān)注機(jī)械及行業(yè)設(shè)備行業(yè)。滿足市場(chǎng)需求，提高產(chǎn)品價(jià)值，是我們前行的力量。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/2938265.html</p></div></div></div></div></div><div id="39zmjq8" class="page-right twoColRt"><div id="d8c29h8" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="f3kzgnv" class="recomPic likePro"><a 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