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clearfix"><div id="l8f22f3" class="twoCol"><div id="ntvh3m9" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應</a>?<a href="http://www.cdcfah.com/cp/first-_jxjxysb/">機械及行業(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_qitafamenbd/">其他閥門</a>?沙坡頭區(qū)止回閥哪個好甘肅誠禹惠物資供應</p><div id="vol7tv8" class="leftbox clearfix"><h1>沙坡頭區(qū)止回閥哪個好甘肅誠禹惠物資供應</h1><div id="jszgne2" class="proBig"><div id="dmo7kba" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024128642578/100910.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="hbdk88t" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024128642578/100910.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="jnpw3ui" 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>甘肅省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>沙坡頭區(qū)止回閥哪個好,止回閥</p><p><span>***更新：</span>2020-10-29 09:23:08</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="pe2yk8q" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">甘肅誠禹惠物資有限公司</a></p><p><span>聯(lián)系人：</span>楊和平</p><p><span>郵箱: </span>349134533@qq.com</p><p><span>電話: </span>18294448288</p><p><span>傳真: </span>0931_</p><p><span>網(wǎng)址: </span>http://www.gscyhwz.com</p><p><span>手機: </span>0931-7840458</p><p><span>地址: </span>北濱河西路1226之27號(立達建材城A區(qū)11棟104室)</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="2ujqxjq" class="page-proshow02"><p class="title">詳細說明</p><div id="vuzw7xr" class="box"><p><p> <span style="font-size:16px;">為了可靠，止回閥的尺寸必須適當?！庇袝r人們認為管線的尺寸決定了閥門的尺寸。并非如此，尤其是對于止回閥。為了獲得穩(wěn)定的性能和長壽命，止回閥的尺寸必須適合其要處理的流量。他們需要經(jīng)歷足夠的流量以在正常流量條件下保持完全打開?！翱偸沁M行尺寸計算，要保持止回閥完全打開，通常需要每秒10到12英尺的流體速度，例如水。要開始打開止回閥，“破裂壓力”大約需要4到8英尺/秒。保持止回閥打開的壓降通常是開啟壓力的二到五倍。止回閥過大會導致流速低，沙坡頭區(qū)止回閥哪個好，從而無法保持閥門始終打開，沙坡頭區(qū)止回閥哪個好。這會導致不穩(wěn)定，閥可能會顫動或顫動。反過來，由于頻繁地更換閥門/閥芯，沙坡頭區(qū)止回閥哪個好，以及由于修理或更換止回閥而導致的其他系統(tǒng)停機，這會導致閥門過早的機械磨損以及可能帶來的額外維護成本。</span> 旋啟式止回閥。旋啟式止回閥對流體的阻力較小。沙坡頭區(qū)止回閥哪個好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="沙坡頭區(qū)止回閥哪個好,止回閥" src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024128642578/100910.png"></div><p> <span style="font-size:16px;">止回閥按結(jié)構(gòu)劃分，可分為升降式止回閥、旋啟式止回閥和蝶式止回閥三種。升降式止回閥可分為立式和直通式兩種。旋啟式止回閥分為單瓣式、雙瓣式和多瓣式三種。蝶式止回閥分為蝶式雙瓣、蝶式單瓣，以上幾種止回閥在連接形式上可分為螺紋連接、法蘭連接、焊接和對夾式連接四種。安裝止回閥是為了保證水泵內(nèi)部水流的流向，從而保障水泵的正常工作。所以關(guān)于止回閥的安裝位置，到底是安裝在水泵前還是水泵后，可以分兩種情況：一種是安裝在水泵前豎吸管端頭，也叫底閥。目的是為了不用抽一次水向水泵充一次水，因為水泵內(nèi)以及泵前的吸管內(nèi)無水時水泵只能空轉(zhuǎn)抽不上水，所以水泵內(nèi)必須充滿水才能抽出水。這種水泵的安裝是高于液面時的一種方法，也叫負壓法。</span> 沙坡頭區(qū)止回閥哪個好蝶式止回閥分為蝶式雙瓣、蝶式單瓣。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="沙坡頭區(qū)止回閥哪個好,止回閥" src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024100673828/8890789.png"></div><p> <span style="font-size:16px;">止回閥過大會導致流速低，從而無法保持閥門始終打開。這會導致不穩(wěn)定，閥可能會顫動或顫動。反過來，由于頻繁地更換閥門/閥芯，以及由于修理或更換止回閥而導致的其他系統(tǒng)停機，這會導致閥門過早的機械磨損以及可能帶來的額外維護成本。止回閥尺寸過小會導致通過該閥的流量過高，從而導致系統(tǒng)中不必要的高壓力損失。它還可能在流中產(chǎn)生過度的湍流，這可能導致閥不穩(wěn)定并增加機械磨損，從而導致更高的維護成本。同樣，通過尺寸過小的閥門的較高流速可能會增加閥門內(nèi)部的腐蝕磨損。閥門的流量系數(shù)Cv用于計算壓力損失。對于水，Cv是壓差為1psi（lb/平方英寸）時的流量，單位為gpm（gal/min）。對于SI單位，Kv是相似的流量系數(shù)：對于水，壓差為1bar時。</span> </p><p> <span style="font-size:16px;">止回閥又叫逆止閥，是一種自動閥門，它依靠管道內(nèi)流動介質(zhì)的壓力推動閥瓣，來實現(xiàn)閥門的關(guān)閉和開啟，當介質(zhì)停止流動，止回閥閥瓣關(guān)閉，它能有效防止管道內(nèi)介質(zhì)發(fā)生倒流，這對于保障管道的安全起到了很大的作用。一種是安裝在水泵前豎吸管端頭，也叫底閥。目的是為了不用抽一次水向水泵充一次水，因為水泵內(nèi)以及泵前的吸管內(nèi)無水時水泵只能空轉(zhuǎn)抽不上水，所以水泵內(nèi)必須充滿水才能抽出水。這種水泵的安裝是高于液面時的一種方法，也叫負壓法。另一種是安裝在水泵的后方。這種安裝方法是液面高于水泵的情況下，方便啟停水泵時不用關(guān)水泵出水閥，特別是對于母管制水泵系統(tǒng)，防止發(fā)生倒流的情況。止回閥必須安裝在泵的出口、出口控制閥之前的位置，以便檢修止回閥。一般泵的出口道是</span><span style="font-size:16px;">軟連接（減震器），接下來是止回閥，再接下來是隔斷閥。</span> 由于是對夾式連接結(jié)構(gòu)，不宜用于大口徑(DN600以上)、高壓(Class900及以上)場合;</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="沙坡頭區(qū)止回閥哪個好,止回閥" src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024327724609/9438807.png"></div><p> <span style="font-size:16px;">止回閥是指啟閉件為圓形閥瓣并靠自身重量及介質(zhì)壓力產(chǎn)生動作來阻斷介質(zhì)倒流的一種閥門。屬自動閥類，又稱逆止閥、單向閥、回流閥或隔離閥。分類及其作用按照閥瓣運動方式分為升降式和旋啟式。升降式止回閥與截止閥結(jié)構(gòu)類似，*缺少帶動閥瓣的閥桿。介質(zhì)從進口端(下側(cè)）流入，從出口端（上側(cè)）流出。當進口壓力大于閥瓣重量及其流動阻力之和時，閥門被開啟。反之，介質(zhì)倒流時閥門則關(guān)閉。旋啟式止回閥有一個斜置并能繞軸旋轉(zhuǎn)的閥瓣，工作原理與升降式止回閥相似。止回閥常用作抽水裝置的底閥，可以阻止水的回流。止回閥與截止閥組合使用，可起到安全隔離的作用。缺點是阻力大，關(guān)閉時密封性差。安裝方法旋啟式止回閥：旋啟式止回閥的閥瓣呈圓盤狀，繞閥座通道的轉(zhuǎn)軸作旋轉(zhuǎn)運動，因閥內(nèi)通道成流線型，流動阻力比升降式止回閥小，適用于低流速和流動不常變化的大口徑場合，但不宜用于脈動流，其密封性能不及升降式。旋啟式止回閥分單瓣式、雙瓣式和</span><span style="font-size:16px;">多半式三種，這三種形式主要按閥門口徑來分，目的是為了防止介質(zhì)停止流動或倒流時，減弱水力沖擊。</span> 止回閥是指啟閉件靠介質(zhì)流動和力量自行開啟或關(guān)閉。沙坡頭區(qū)止回閥哪個好</p><p style="text-indent:25px">止回閥在連接形式上可分為螺紋連接、法蘭連接、焊接和對夾式連接四種。沙坡頭區(qū)止回閥哪個好</p><p> <span style="font-size:16px;">升降式止回閥：閥瓣沿著閥體垂直中心線滑動的止回閥，升降式止回閥只能安裝在水平管道上，在高壓小口徑止回閥上閥瓣可采用圓球。升降式止回閥的閥體形狀與截止閥一樣（可與截止閥通用），因此它的流體阻力系數(shù)較大。其結(jié)構(gòu)與截止閥相似，閥體和閥瓣與截止閥相同。閥瓣上部和閥蓋下部加工有導向套簡，閥瓣導向簡可在閥盞導向簡內(nèi)自由升降，當介質(zhì)順流時，閥瓣靠介質(zhì)推力開啟，當介質(zhì)停流時，閥瓣靠自垂降落在閥座上，起阻止介質(zhì)逆流作用。直通式升降止回閥介質(zhì)進出口通道方向與閥座通道方向垂直；立式升降式止回閥，其介質(zhì)進出口通道方向與閥座通道方向相同，其流動阻力較直通式小。旋啟式止回閥有一個斜置并能繞軸旋轉(zhuǎn)的閥瓣，工作原理與升降式止回閥相似。止回閥常用作抽水裝置的底閥，可以阻止</span><span style="font-size:16px;">水的回流。止回閥與截止閥組合使用，可起到安全隔離的作用。缺點是阻力大，關(guān)閉時密封性差。</span> 沙坡頭區(qū)止回閥哪個好</p><p style="text-indent:25px">甘肅誠禹惠物資有限公司主營品牌有誠禹惠球閥,誠禹惠閘閥,誠禹惠閥門，發(fā)展規(guī)模團隊不斷壯大，該公司服務型的公司。是一家有限責任公司企業(yè)，隨著市場的發(fā)展和生產(chǎn)的需求，與多家企業(yè)合作研究，在原有產(chǎn)品的基礎(chǔ)上經(jīng)過不斷改進，追求新型，在強化內(nèi)部管理，完善結(jié)構(gòu)調(diào)整的同時，良好的質(zhì)量、合理的價格、完善的服務，在業(yè)界受到寬泛好評。公司擁有專業(yè)的技術(shù)團隊，具有誠禹惠閥門，球閥批發(fā)，閥門批發(fā)，蝶閥批發(fā)等多項業(yè)務。甘肅誠禹惠物資自成立以來，一直堅持走正規(guī)化、專業(yè)化路線，得到了廣大客戶及社會各界的普遍認可與大力支持。</p></p><br /><p>文章來源地址: 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