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id="gwrju8u" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_jxjxysb/">機(jī)械及行業(yè)設(shè)備</a>?<a 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>?湖南FSA真空管道蝶閥口徑頂耕國際貿(mào)易供應(yīng)</p><div id="gt8kvv8" class="leftbox clearfix"><h1>湖南FSA真空管道蝶閥口徑頂耕國際貿(mào)易供應(yīng)</h1><div id="setjtaj" class="proBig"><div id="vti3iza" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737890810547/4528489.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="rjukzpl" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737890810547/4528489.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8ta77t3" 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>湖南FSA真空管道蝶閥口徑</p><p><span>***更新：</span>2020-05-28 08:18:44</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="axyp7su" 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(hào)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="bok2ss8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="3yzer8i" class="box"><p><p> 一、選擇執(zhí)行機(jī)構(gòu)應(yīng)考慮哪三個(gè)主要因素？ </p> <p> <br /> </p> <p> 1）執(zhí)行機(jī)構(gòu)的輸出要大于閥門的負(fù)荷，湖南FSA真空管道蝶閥口徑，且合理匹配。 </p> <p> 2）檢查標(biāo)準(zhǔn)組合時(shí)，要考慮閥門所規(guī)定的允許壓差是否滿足工藝要求。大壓差時(shí)要計(jì)算閥芯所受的不平衡力。 </p> <p> 3）要考慮執(zhí)行機(jī)構(gòu)的響應(yīng)速度是否滿足工藝操作要求，尤其是電動(dòng)執(zhí)行機(jī)構(gòu)。 </p> <p> <br /> </p> <p> 二，湖南FSA真空管道蝶閥口徑、與氣動(dòng)執(zhí)行機(jī)構(gòu)相比電動(dòng)執(zhí)行機(jī)構(gòu)有何特點(diǎn)，湖南FSA真空管道蝶閥口徑，有哪幾種輸出形式 </p> <p> <br /> </p> <p> 電動(dòng)驅(qū)動(dòng)源為電力簡(jiǎn)單方便，推力、扭矩大，剛度大。但結(jié)構(gòu)復(fù)雜，可靠性差。在中小規(guī)格上比氣動(dòng)的貴。常用于無氣源或不需嚴(yán)格防爆、防燃的場(chǎng)合。 </p> <p> <br /> </p> <p> 三、為什么角行程類閥的切斷壓差較大？ </p> <p> <br /> </p> <p> 角行程類閥的切斷壓差較大，是因?yàn)榻橘|(zhì)在閥芯或閥板上產(chǎn)生的合力對(duì)轉(zhuǎn)動(dòng)軸產(chǎn)生的力矩非常小，因此，它能承受較大的壓差。 </p> <p> 蝶閥，球閥是最常見的角行程類閥門。 </p> <p> <br /> </p> <p> 四、哪些閥需進(jìn)行流向選擇？如何選擇？ </p> <p> <br /> </p> <p> 流開、流閉各有利弊。流開型的閥工作比較穩(wěn)定，但自潔性能和密封性較差，壽命短；流閉型的閥壽命長，自潔性能和密封性好，但當(dāng)閥桿直徑小于閥芯直徑時(shí)穩(wěn)定性差。 </p> <p> <br /> </p> <p> <br /> </p> <p> 五、除單、雙座閥及套筒閥外還有哪些具有調(diào)節(jié)功能的閥？ </p> <p> <br /> </p> <p> 隔膜閥、蝶閥、O型球閥（以切斷為主）、V型球閥（調(diào)節(jié)比大、具剪切作用）、偏心旋轉(zhuǎn)閥都是具有調(diào)節(jié)功能的閥。 </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南FSA真空管道蝶閥口徑" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737890810547/4528489.jpg"></div><p> 閥門的種類繁多，說法也不完全統(tǒng)一，有的按用途分（如化工、石油、電站等）、有的按介質(zhì)分（如水蒸汽、空氣閥等）、有的按材質(zhì)分（如鑄鐵、鑄鋼、鍛鋼、不銹鋼、陶瓷、UPVC等）、有的按連接形式分（如內(nèi)螺紋、法蘭閥、對(duì)夾等）、有的按溫度分（如低溫閥、高溫閥等）。我國大多數(shù)習(xí)慣是按壓力和結(jié)構(gòu)種類來區(qū)分。即：按公稱壓力分：≤1.6MPa為低壓閥、壓力2.5、4.0、6.4MPa為中壓閥、≥10MPa為高壓閥、超過100MPa為超高壓閥。按結(jié)構(gòu)種類分主要有： </p> <p> 旋塞閥、閘閥、截止閥、球閥—用于開啟或關(guān)閉管道的介質(zhì)流動(dòng)。 </p> <p> 止回閥（包括底閥）—用于自動(dòng)防止管道內(nèi)的介質(zhì)倒流。 </p> <p> 節(jié)流閥—用于調(diào)節(jié)管道介質(zhì)的流量。 </p> <p> 蝶閥—用于開啟或關(guān)閉管道內(nèi)的介質(zhì)。也可作調(diào)節(jié)用。 </p> <p> 安全閥—用于鍋爐、容器設(shè)備及管道上，當(dāng)介質(zhì)壓力超過規(guī)定數(shù)值時(shí)，能自動(dòng)排除過剩介質(zhì)壓力，保證生產(chǎn)運(yùn)行安全。 </p> <p> 減壓閥—用于自動(dòng)降低管道及設(shè)備內(nèi)介質(zhì)壓力。系使介質(zhì)經(jīng)過閥瓣的間隙時(shí)，產(chǎn)生阻力造成壓力損失，達(dá)到減壓目的。 </p> <p> 疏水器—用于蒸汽管道上自動(dòng)排除冷凝水，防止蒸汽損失或泄漏。 </p> <p> V型球閥—用于對(duì)介質(zhì)流量進(jìn)行調(diào)節(jié)，流量特性為等百分比。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南FSA真空管道蝶閥口徑" 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(diǎn)；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(diǎn)；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(qiáng)度試驗(yàn)；2、對(duì)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(qiáng)度試驗(yàn)；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(duì)，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(duì)，存在著以小代大、螺旋盤繞接頭不良、上緊下松等缺點(diǎn)；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(diǎn)；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="湖南FSA真空管道蝶閥口徑" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494296875/9390800.png"></div></p><br /><p>文章來源地址: 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