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id="zedah7e" class="proBig"><div id="pzw3bqx" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shhanshang/637408581758985020/7696112.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="etq2rqc" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shhanshang/637408581758985020/7696112.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="kzrb4wq" 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>北京安全閥閥座大修,閥座</p><p><span>***更新：</span>2021-01-21 08:17:53</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="3myvx3i" 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="qkcu8q7" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="lfhebda" class="box"><p><p style="text-indent:25px">閥座密封材料主要有特殊高分子和金屬密封2類。1、特殊高分子材料：高分子材料分通用高分子材料和特殊高分子材料兩大類。通用高分子材料主要有聚氯乙烯、聚乙烯、聚丙烯、環(huán)氧樹脂、酚醛樹脂和呋喃樹脂等。特殊高分子材料主要有聚四氯乙烯、聚三氟氯乙烯、聚全氟乙丙烯、聚醚醚酮和聚酰亞胺等。2、金屬密封材料：金屬密封表面硬度高且有合適的硬度差?？赏ㄟ^(guò)表面硬化來(lái)提高硬度，增強(qiáng)耐磨性能。金屬密封材料主要有鉻基硬質(zhì)合金、鈷基硬質(zhì)合金、鎳合金，北京安全閥閥座大修，北京安全閥閥座大修、碳化鎢、不銹鋼等，北京安全閥閥座大修。聚三氟氯乙烯閥座能耐較高溫下的無(wú)機(jī)酸、較低溫度下的鹽溶液強(qiáng)氧化劑。北京安全閥閥座大修</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京安全閥閥座大修,閥座" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408581758985020/7696112.png"></div><p style="text-indent:25px">聚四氟乙烯閥座有什么特點(diǎn)具有耐低溫、耐磨，耐腐蝕，具有自動(dòng)回彈性等優(yōu)良性能，在軟密封球閥和軟密封蝶閥中普遍應(yīng)用。金屬閥座與閥體連接，其一端面為密封面，與關(guān)閉件的密封面相接觸，以切斷管路介質(zhì)。閥座由內(nèi)外圓柱面、端平面及螺紋面所組成。根據(jù)閥門的用途，閥座可分別用銅、不銹鋼、不銹鋼基體堆焊硬質(zhì)合金或碳素鋼基體堆焊不銹鋼等制成。為保證閥座密封面具有一定的硬度和耐磨性，Cr13型不銹鋼閥座需經(jīng)過(guò)熱處理。閥座通常采用鍛、鑄件毛坯，也可以用管材直接加工。重慶蝶閥閥座彈性式彈性閥座：借助于彈性元件,如金屬?gòu)椈杉芎蛷椈傻仍陬A(yù)緊力或流體壓力下產(chǎn)生彈性變形。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京安全閥閥座大修,閥座" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408582221338537/7912539.png"></div><p style="text-indent:25px">閥座和閥芯配合使用，在油路中起到控制作用。ptfe球閥閥座用的材料：EPDM(三元乙丙橡膠):有優(yōu)異的耐天候、耐臭氧、耐熱、耐酸堿、耐水蒸汽、顏色穩(wěn)定性、電性能、充油性及常溫流動(dòng)性。乙丙橡膠制品在120°C下可長(zhǎng)期使用，在150-200°C下可短暫或間歇使用。根據(jù)工況選擇吧大多數(shù)用聚四氟乙烯，但是耐壓，耐溫也不高，一般也就一百多攝氏度，10Mpa也可以其他的增強(qiáng)型聚四氟Z烯或者聚三氟氯乙烯，這相比于四氟耐壓方面要好點(diǎn)再者可以用聚醚醚酮和對(duì)位聚苯等特殊高分子材料，分子材料分通用高分子材料和特殊高分子材料兩大類。</p><p style="text-indent:25px">閥門使用時(shí)，一旦上游密封意外失效產(chǎn)生泄漏，下游閥座實(shí)現(xiàn)密封。雙級(jí)密封式閥座對(duì)于承受較大密封力的采用橡膠和塑料組合密封結(jié)構(gòu)，橡膠主要起密封作用，塑料起支承和輔助密封雙重作用。特殊結(jié)構(gòu)式閥座有內(nèi)或外調(diào)節(jié)式、波紋管式、注脂密封式、雙推動(dòng)式和組合式。內(nèi)調(diào)節(jié)式閥座是閥座與球體之間的密封比壓靠?jī)?nèi)調(diào)整螺母調(diào)節(jié)，其優(yōu)點(diǎn)是沒(méi)有向外的泄漏點(diǎn)。外調(diào)節(jié)式閥座是閥座與球體之間的密封比壓靠外部調(diào)節(jié)螺塞壓緊楔塊使伸縮套產(chǎn)生位移進(jìn)行調(diào)整。閥座是用圓盤式啟閉件往復(fù)回轉(zhuǎn)90°左右來(lái)開啟、關(guān)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="北京安全閥閥座大修,閥座" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408581774717450/7860008.png"></div><p style="text-indent:25px">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。當(dāng)閥座固定球體浮動(dòng)時(shí)，在流體壓力作用下球體在流體流動(dòng)方向產(chǎn)生位移，使它與閥后閥座密封而更緊密地接觸，即在該密封面上的比壓增大，形成單面密封，同時(shí)，閥前閥座密封面上的比壓相應(yīng)減小，往往不保證密封。一般閥座直徑即為閥門較大流通直徑。當(dāng)閥座浮動(dòng)球體固定時(shí)，流體壓力不能使球體產(chǎn)生位移，而是閥座借助于彈簧或流體推力壓向球體，建立密封比壓。選用軟閥座應(yīng)考慮的材料性質(zhì)是：流體兼容性，包括膨脹、硬度損失、滲透性、降解。重慶蝶閥閥座</p><p style="text-indent:25px">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)。北京安全閥閥座大修</p><p style="text-indent:25px">固定球閥彈簧組彈性閥座是一種涉及高、低和普通溫度的密封結(jié)構(gòu)，應(yīng)用十分普遍。三種形式的密封結(jié)構(gòu)特點(diǎn)各不相同，在應(yīng)用時(shí)必須選擇正確。密封壓比受受壓面積壓差推動(dòng)力、預(yù)緊彈簧彈力及滑動(dòng)摩擦力影響。同時(shí)受到受壓面積壓差推動(dòng)力影響較大。然而，兩受壓面中徑尺寸一般相差不大。所以設(shè)計(jì)時(shí)必須進(jìn)行精確的計(jì)算。（1）固定球閥彈簧組彈性閥座的閥體接觸面中徑d1和球體接觸面中徑d2的大小關(guān)系決定了閥門的三種密封形式。（2）固定球閥彈簧組彈性閥座的密封比壓（即密封的可靠性）主要取決于閥體接觸面中徑d1和球體接觸面中徑d2的比例關(guān)系。（3）對(duì)三種密封結(jié)構(gòu)來(lái)說(shuō)，閥前閥座密封，可以使用在壓力P≤10MPa的腐蝕和液化氣體中以及閥門通徑較大的場(chǎng)合；閥后閥座密封，通常使用于壓力P≥16MPa的80～100通徑的閥門中；雙面密封，特別使用于危險(xiǎn)的對(duì)密封要求高的場(chǎng)所。北京安全閥閥座大修</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)作為市政公用工程，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)。的企業(yè)之一，為客戶提供良好的維修高壓主汽門、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。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)備市場(chǎng)，以敏銳的市場(chǎng)洞察力，實(shí)現(xiàn)與客戶的成長(zhǎng)共贏。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2944846.html</p></div></div></div></div></div><div id="mrtlikr" 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