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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ktfh4fs" 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>廣東沖水閥閥座磨損修復(fù),閥座</p><p><span>***更新：</span>2021-01-27 04:27:09</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="87gd4on" 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L區(qū)228室(上海富盛經(jīng)濟(jì)開發(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="qjlshi3" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="sw3yfwy" class="box"><p><p style="text-indent:25px">閥座和密封圈是球閥的關(guān)鍵部件。密封圈應(yīng)具有優(yōu)良的穩(wěn)定性，較小的摩擦系數(shù)，不易老化，密封性能好。閥座應(yīng)具有一定的強(qiáng)度和剛度，間隙適中，受壓時(shí)不易變形。金屬密封閥座應(yīng)滿足高溫、高壓、強(qiáng)腐蝕、很低溫、零泄漏、長壽命、防火安全和耐壓耐磨等功能。聚四氟乙烯(PTFE)具有耐腐蝕性強(qiáng)，性能穩(wěn)定，不易老化，廣東沖水閥閥座磨損修復(fù)，摩擦系數(shù)低，易于成形，尺寸穩(wěn)定并且可以通過填充，廣東沖水閥閥座磨損修復(fù)、添加適當(dāng)?shù)牟牧细纳破渚C合性能得到強(qiáng)度更好，廣東沖水閥閥座磨損修復(fù)、摩擦系數(shù)更低的蝶閥密封材料，克服了合成橡膠的局限性，因而以聚四氟乙烯為表示的高分子聚合材料及其填充改性材料，在蝶閥上得到了普遍的應(yīng)用，從而使蝶閥的性能得到進(jìn)一步的提高，制造出了溫度壓力范圍更廣，密封性能可靠，使用壽命更長的蝶閥。金屬密封閥座產(chǎn)品不適合裝置于管路結(jié)尾。廣東沖水閥閥座磨損修復(fù)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東沖水閥閥座磨損修復(fù),閥座" src="https://tyunfile.71360.com/UploadFile/shhanshang/637444325321836105/4271419.png"></div><p style="text-indent:25px">閥座的特殊高分子密封材料：（1）聚全氟乙丙烯：聚全氟乙丙烯具有耐高溫和耐低溫性能，可在-85~205℃范圍內(nèi)長期工作，密度為2.1g/cm3，導(dǎo)熱系數(shù)為0.25W/（m.c），線膨脹系數(shù)為（9.5~19.6）×10-5/℃，抗拉強(qiáng)度為19~20MPa，抗壓強(qiáng)度為710MPa，彎曲強(qiáng)度為14MPa。具有與聚四氟乙烯相當(dāng)?shù)幕瘜W(xué)穩(wěn)定性，能耐各種濃度的無機(jī)酸、堿、醇、酮、烴類、鹵代烴、芬烴、油脂和去污劑等。（2）聚酰胺：聚酰胺在常溫下具有較高的抗拉強(qiáng)度，良好的沖擊韌性，高的硬度和疲勞強(qiáng)度，特別是耐磨性和自潤滑性能優(yōu)異，低摩擦系數(shù)等特點(diǎn)。密度為1.5g/cm3，導(dǎo)熱系數(shù)為0.25W/（m#c），線膨脹系數(shù)約為10.5×10-5/℃，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。廣東沖水閥閥座磨損修復(fù)內(nèi)調(diào)節(jié)式閥座是閥座與球體之間的密封比壓靠內(nèi)調(diào)整螺母調(diào)節(jié)其優(yōu)點(diǎn)是沒有向外的泄漏點(diǎn)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東沖水閥閥座磨損修復(fù),閥座" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408582074776027/234379.png"></div><p style="text-indent:25px">組合式由彈簧組閥座與活塞式閥座組合而成。前者起主要密封作用，后者接通控制壓力，起輔助密封作用。硬密封閥座：本體堆焊式閥座是在某種金屬材料上堆焊硬質(zhì)合金，閥座帶有一個彈性尾座，有利于減少密封面的摩擦損傷。多層式密封閥座是多層不銹鋼片和多層薄石墨片交替疊放經(jīng)特殊的加工手段卷壓制而成的，提高了高溫高壓下的性能。空心管式密封閥座內(nèi)外是襯套，中間是不銹鋼管，靠空心的彈力使閥座壓緊球體。旋轉(zhuǎn)密封閥座主要特點(diǎn)是閥門在啟閉過程中，閥座可沿通道軸線作旋轉(zhuǎn)運(yùn)動，其結(jié)構(gòu)在閥座的圓周上分布一圈齒牙，球體每關(guān)閉一次，閥座旋轉(zhuǎn)一個齒。</p><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。閥座運(yùn)行時(shí)要避免存留臟物、雜物進(jìn)入閥座減壓保障系統(tǒng)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東沖水閥閥座磨損修復(fù),閥座" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408581930586981/8695791.png"></div><p style="text-indent:25px">閥座是閥門內(nèi)可拆卸面部件，用于支撐閥芯全關(guān)位置，并構(gòu)成密封副。它可將閥座前管路較高的液體壓力減少至閥座后管路所需的水平。這里的傳輸介質(zhì)主要是水。閥座普遍用于高層建筑、城市給水管網(wǎng)水壓過高的區(qū)域、礦井及其他場合，以保證給水系統(tǒng)中各用水點(diǎn)獲得適當(dāng)?shù)姆?wù)水壓和流量。鑒于水的漏失率和浪費(fèi)程度幾乎同給水系統(tǒng)的水壓大小成正比，因此閥座具有改善系統(tǒng)運(yùn)行工況和潛在節(jié)水作用，據(jù)統(tǒng)計(jì)其節(jié)水效果約為30%。閥座的構(gòu)造類型很多，以往常見的有薄膜式、內(nèi)彈簧活塞式等。閥座的基本作用原理是靠閥座內(nèi)流道對水流的局部阻力降低水壓，水壓降的范圍由連接閥座瓣的薄膜或活塞兩側(cè)的進(jìn)出口水壓差自動調(diào)節(jié)。聚四氟乙烯閥座彈性模量為400MPa。廣東沖水閥閥座磨損修復(fù)</p><p style="text-indent:25px">彈性閥座需要借助于彈性元件。廣東沖水閥閥座磨損修復(fù)</p><p style="text-indent:25px">上海含商建設(shè)工程有限公司小編介紹，閥座與閥體配合的外圓精度為4~6級、光潔度不低于△5。閥座基面的光潔度一般不低于△6。與閥體配合的螺紋精度為3級，光潔度為△5。密封面的光潔度一般為△7~△9。閥門主要為了滿足高溫、高壓及零泄漏等惡劣環(huán)境，為了達(dá)到閥門零泄漏的密封性能要求，很大程度上取決于閥門閥座密封面（見圖1）的加工精度，因此對閥門閥座密封面加工精度要求較高，閥門閥座密封面精度的影響因素主要有3個方面：表面粗糙度、角度精度和錐表面的硬度。廣東沖水閥閥座磨損修復(fù)</p><p style="text-indent:25px">上海含商建設(shè)工程有限公司總部位于上海市崇明區(qū)新河鎮(zhèn)新申路921弄2號L區(qū)228室(上海富盛經(jīng)濟(jì)開發(fā)區(qū))，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)開發(fā)、技術(shù)轉(zhuǎn)讓、技術(shù)咨詢和技術(shù)服務(wù)。的公司。公司自創(chuàng)立以來，投身于維修高壓主汽門、高壓調(diào)門，維修中壓主汽門、中壓調(diào)門，閥座的車削、堆焊、補(bǔ)焊，熱處理、研磨，是機(jī)械及行業(yè)設(shè)備的主力軍。上海含商建設(shè)繼續(xù)堅(jiān)定不移地走高質(zhì)量發(fā)展道路，既要實(shí)現(xiàn)基本面穩(wěn)定增長，又要聚焦關(guān)鍵領(lǐng)域，實(shí)現(xiàn)轉(zhuǎn)型再突破。上海含商建設(shè)始終關(guān)注自身，在風(fēng)云變化的時(shí)代，對自身的建設(shè)毫不懈怠，高度的專注與執(zhí)著使上海含商建設(shè)在行業(yè)的從容而自信。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3028991.html</p></div></div></div></div></div><div id="kya8u87" class="page-right twoColRt"><div id="g8ashyf" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="nc8cebd" class="recomPic likePro"><a 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