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href="http://www.cdcfah.com/cp/second-jxjxysb_famenti/">閥門</a>?<a href="http://www.cdcfah.com/cp/third-famenti_diefakna/">蝶閥</a>?天津原裝真空管道蝶閥密封頂耕國際貿(mào)易供應(yīng)</p><div id="sgb3a8w" class="leftbox clearfix"><h1>天津原裝真空管道蝶閥密封頂耕國際貿(mào)易供應(yīng)</h1><div id="c272u5q" class="proBig"><div id="kw8ir82" class="bigimg"><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 id="fhdtjgp" 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="b2vwhcn" 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>天津原裝真空管道蝶閥密封</p><p><span>***更新：</span>2020-06-09 02:21:17</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="hkagbww" 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="jrmx3uz" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="z88jcnm" class="box"><p><p> 一：軟硬密封蝶閥的區(qū)別： </p> <p> <br /> </p> <p> 硬密封蝶閥：密封副的兩側(cè)均是金屬材料或較硬的其它材料的被稱為"硬密封".這種密封的密封性能較差,但耐高溫,抗磨損，天津原裝真空管道蝶閥密封,機械性能好.如:鋼+鋼;鋼+銅;鋼+石墨;鋼+合金鋼;(這里的鋼也可能是鑄鐵,鑄鋼,合金鋼也可能是堆焊,噴涂的合金). </p> <p> <br /> </p> <p> 硬密封使用壽命長，但是密封性相對比軟密封差。 </p> <p> <br /> </p> <p> 軟密封的優(yōu)點是密封性能好，缺點是容易老化、磨損、使用壽命短。 </p> <p> <br /> </p> <p> 軟密封：密封副的兩側(cè)一側(cè)是金屬材料,另一側(cè)是有彈性的非金屬材料的被稱為"軟密封".這種密封的密封性能較好,但不耐高溫,易磨損,機械性較差.如:鋼+橡膠;鋼+四氟[wiki]聚乙烯[/wiki];等轉(zhuǎn)子泵. </p> <p> <br /> </p> <p> 二：密封蝶閥特點： </p> <p> <br /> </p> <p> 1、蝶板密封面采用堆焊鈷基硬質(zhì)合金，密封面耐磨損，使用壽命長 </p> <p> <br /> </p> <p> 2、密封圈選用不銹鋼制作，具有金屬硬密封和彈性密封的雙重優(yōu)點，天津原裝真空管道蝶閥密封，無論在低溫和高溫的情況下，均具有優(yōu)良的密封性能，具有耐腐蝕,使用壽命長等特點 </p> <p> <br /> </p> <p> 3、硬密封蝶閥具有雙向密封功能，安裝時不受介質(zhì)流向的限制，天津原裝真空管道蝶閥密封，也不受空間位置的影響，可在任何方向安裝。 </p> <p> <br /> </p> <p> 4、大規(guī)格蝶板采用絎架結(jié)構(gòu)，強度高，過流面積大，流阻小 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="天津原裝真空管道蝶閥密封" src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737493554688/8379117.png"></div><p> 閥體和閥蓋的泄漏原因：1、鑄鐵件鑄造質(zhì)量不高，閥體和閥蓋體上有砂眼、松散組織、夾渣等缺點；2、天冷凍裂；3、焊接不良，存在著夾渣、未焊接，應(yīng)力裂紋等缺點；4、鑄鐵閥門被重物撞擊后損壞。維護(hù)方法：1、提高鑄造質(zhì)量，安裝前嚴(yán)格按規(guī)定進(jìn)行強度試驗；2、對氣溫在0℃和0℃以下的閥門，應(yīng)進(jìn)行保溫或拌熱，停止使用的閥門應(yīng)排除積水；3、由焊接組成的閥體和閥蓋的焊縫，應(yīng)按有關(guān)焊接操作規(guī)程進(jìn)行，焊后還應(yīng)進(jìn)行探傷和強度試驗；4、閥門上禁止推放重物，不允許用手錘撞擊鑄鐵和非金屬閥門，大口徑閥門的安裝應(yīng)有支架。填料處的泄露閥門的外漏，填料處占的比例為比較大。原因：1、填料選用不對，不耐介質(zhì)的腐蝕，不耐閥門高壓或真空、高溫或低溫的使用；2、填料安裝不對，存在著以小代大、螺旋盤繞接頭不良、上緊下松等缺點；3、填料超過使用期，已老化，喪失彈性；4、閥桿精度不高，有彎曲、腐蝕、磨損等缺點；5、填料圈數(shù)不足，壓蓋未壓緊；6、壓蓋、螺栓、和其他部件損壞，使壓蓋無法壓緊；7、操作不當(dāng)，用力過猛等；8、壓蓋歪斜，壓蓋與閥桿間空隙過小或過大，致使閥桿磨損，填料損壞。維護(hù)方法：1、應(yīng)按工況條件選用填料的材料和型式；2、按有關(guān)規(guī)定正確的安裝填料。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="天津原裝真空管道蝶閥密封" src="https://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737718496094/8657721.jpg"></div><p> 電動閥門和氣動閥門相比，前者結(jié)構(gòu)簡單，運行可靠，對遠(yuǎn)距離操作點其動力源（電源或氣源）容易解決。缺點是價格較高，且防爆要求也較高。在選用時，應(yīng)綜合考慮動力源的可獲得性、價格和控制要求等因素。電動閥門選型：當(dāng)選用電動閥門電動執(zhí)行器的控制模式一般分為開關(guān)型和調(diào)節(jié)型）時，除了基本的閥體口徑、壓力、材質(zhì)等要求外，還應(yīng)提供下列參數(shù)： 1.電源參數(shù)（包括電壓、相數(shù)和頻率）； 2.運行時間和電動執(zhí)行器的形式； 3.是否要求防爆，防爆等級； 4.大氣防護(hù)等級； 5.過載保護(hù)要求，例如過行程保護(hù)、過扭矩保護(hù)等； 6.就地操作要求，如是否帶就地操作手輪； 7.操作指示要求。氣動閥門選型：當(dāng)選用氣動閥門氣動執(zhí)行器的運作原理可分為單作用和雙作用）時，除了確定閥體口徑、壓力、材質(zhì)等具體參數(shù)外，還應(yīng)在提供下列參數(shù)： 1.氣源參數(shù)（包括氣源壓力范圍、是否帶自備儲氣罐等） 2.運行時間和氣動執(zhí)行器的形式 3.是否要求防爆，防爆等級； 4.大氣防護(hù)等級； 5.過載保護(hù)要求，例如過行程保護(hù)、過扭矩保護(hù)等； 6.就地操作要求，如是否帶就地操作手輪； </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="天津原裝真空管道蝶閥密封" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737719785157/327671.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/194804.html</p></div></div></div></div></div><div id="pnyusm8" class="page-right twoColRt"><div id="qnjuuk7" class="box01 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