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class="container clearfix tcPro"><section class="home-main container clearfix"><div id="zty2dxo" class="twoCol"><div id="nxu2qi2" 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_qitafamenbd/">其他閥門</a>?肅南止回閥電話甘肅誠(chéng)禹惠物資供應(yīng)</p><div id="yrjby72" class="leftbox clearfix"><h1>肅南止回閥電話甘肅誠(chéng)禹惠物資供應(yīng)</h1><div id="ptly7uk" class="proBig"><div id="gvcu9kh" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024352636718/6696423.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="a7jod4e" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024352636718/6696423.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="vkcu9vn" 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>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>肅南止回閥電話,止回閥</p><p><span>***更新：</span>2020-10-30 07:21:13</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="tdashgm" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">甘肅誠(chéng)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(jī): </span>0931-7840458</p><p><span>地址: </span>北濱河西路1226之27號(hào)(立達(dá)建材城A區(qū)11棟104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="zo3ewgh" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ynuwgh7" class="box"><p><p> <span style="font-size:16px;">止回閥是*允許介質(zhì)沿一個(gè)方向流動(dòng)的裝置，閥瓣依靠自身重量及介質(zhì)壓力產(chǎn)生動(dòng)作，肅南止回閥電話，實(shí)現(xiàn)阻斷介質(zhì)倒流的一種閥門。它根據(jù)系統(tǒng)中的壓力自動(dòng)工作，運(yùn)行中不需要用戶或執(zhí)行裝置來干預(yù)，屬于自動(dòng)閥類。又稱為逆止閥、單向閥、回流閥或隔離閥。按結(jié)構(gòu)分為升降式、旋啟式和蝶式止回閥。主要作用：防止介質(zhì)倒流、防止水泵反轉(zhuǎn)、防止容器內(nèi)的介質(zhì)泄露。升降式止回閥的閥瓣沿著閥體垂直中心線動(dòng)作，結(jié)構(gòu)與截止閥類似，但只有閥瓣，而沒有人為旋起的閥桿，肅南止回閥電話，肅南止回閥電話。介質(zhì)從進(jìn)口端(下側(cè))流入，從出口端(上側(cè))流出。當(dāng)進(jìn)口壓力大于閥瓣重量及其流動(dòng)阻力之和時(shí)，閥門被開啟。反之，介質(zhì)倒流時(shí)閥門則關(guān)閉。工作原理：旋啟式止回閥的閥瓣繞閥座通道里的轉(zhuǎn)軸做旋轉(zhuǎn)運(yùn)動(dòng)，順流時(shí)閥瓣打開，有逆向流動(dòng)時(shí)閥瓣關(guān)閉。適用于低</span><span style="font-size:16px;">流速和水流方向不變的大口徑管網(wǎng)系統(tǒng)。</span> 常在閥的通道隔板上設(shè)置多個(gè)閥瓣，成為多瓣式;肅南止回閥電話</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="肅南止回閥電話,止回閥" src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024352636718/6696423.png"></div><p> <span style="font-size:16px;">止回閥尺寸過小會(huì)導(dǎo)致通過該閥的流量過高，從而導(dǎo)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(dǎo)致閥不穩(wěn)定并增加機(jī)械磨損，從而導(dǎo)致更高的維護(hù)成本。同樣，通過尺寸過小的閥門的較高流速可能會(huì)增加閥門內(nèi)部的腐蝕磨損。閥門的流量系數(shù)Cv用于計(jì)算壓力損失。對(duì)于水，Cv是壓差為1psi（lb/平方英寸）時(shí)的流量，單位為gpm（gal/min）。對(duì)于SI單位，Kv是相似的流量系數(shù)：對(duì)于水，壓差為1bar時(shí)，立方米/小時(shí)對(duì)于給定的流量，較高的Cv意味著較低的壓力損失。在其他類型的閥門中，通常需要更高的Cv。止回閥則不是，這需要不同的方法。對(duì)于止回閥，關(guān)鍵因素是要有足夠的流量以使閥在正常系統(tǒng)流量下保持打開狀態(tài)。尺寸合適時(shí)，它們需要相應(yīng)的壓降才能有效運(yùn)行。Bregman說，在單向閥選擇過程中，“您需要知道將閥保持在全開位置所需的小流速或壓力降?！睉?yīng)用注意事項(xiàng)由于上游的泵，彎頭或其他流量干擾，即使是尺寸合適的止回閥在處理湍流時(shí)也可能會(huì)不穩(wěn)定。優(yōu)良作法是在閥的上游留出一定長(zhǎng)度的直管，以使湍流消散（如果有空間的話）。通常，長(zhǎng)度為10D就足夠了。</span> 肅南止回閥電話由于是對(duì)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(chǎng)合;</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="肅南止回閥電話,止回閥" src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024406582031/6664710.png"></div><p> <span style="font-size:16px;">"止回閥"的選型1為了防止介質(zhì)逆流，在設(shè)備、裝置和管道上都應(yīng)安裝止回閥；2止回閥一般適用于清凈介質(zhì)，不宜用于含有固體顆粒和粘度較大的介質(zhì)；3一般在公稱通經(jīng)50mm的水平管道上都應(yīng)選用立式升降止回閥；4直通式升降止回閥在水平管道和垂直管道上都可安裝；5對(duì)于水泵進(jìn)口管路，宜選用底閥，底閥一般只安裝在泵進(jìn)口的垂直管道上，并且介質(zhì)自下而上流動(dòng)；6升降式旋啟式密封性好，流體阻力大，臥式宜裝在水平管道上，立式裝在垂直管道上；7旋啟式止回閥的安裝位置不受限制，它可裝在水平、垂直或傾斜的管線上，如裝在垂直管道上，介質(zhì)流向要由下而上；8旋啟式止回閥不宜制成小口徑閥門、可以做成很高的工作壓力，PN可達(dá)到42MPa，而且DN也可以做到很大，比較大可以達(dá)到2000mm以上。根據(jù)殼體及密封件的材質(zhì)不同可以適用任何工作介質(zhì)和任何工作溫度范圍。介質(zhì)為水、蒸汽、氣體、腐蝕性介質(zhì)、油品、藥品、等。介質(zhì)工作溫度范圍在-196--800℃之間。</span> </p><p> <span style="font-size:16px;">止回閥的作用是“止回”，但其副作用是“增加排煙阻力”，而一個(gè)好的止回閥是保證止回的同時(shí)達(dá)到排煙阻力小。那么究竟如何選購煙道止回閥呢？小編總結(jié)出了選購三要點(diǎn)：1、單擋板止回閥在排煙阻力方面不給力，而雙開型止回閥通風(fēng)比較大、不進(jìn)煙道、完全通用，解決了單檔板止回閥在公共煙道仍然會(huì)返味的問題；2、效果好的止回閥是有橡膠或硅膠密封圈的；3、止回閥的擋板和框之間，是平面與立面相接的才是好止逆閥。由于現(xiàn)在市面上大部分抽油煙機(jī)里都會(huì)有一個(gè)煙道止回閥，所以小編建議大家把自己購買的止回閥安裝在煙道口上，但是也要注意長(zhǎng)久使用以后油漬沾到葉片導(dǎo)致葉片吹不起來或吹起來合不上去，影響了吸煙的效果，葉片合不上跟沒安裝止回閥是一樣的，所以定期檢查煙道止回閥是很有必要的。</span> 由于具有彈簧輔助復(fù)位結(jié)構(gòu)，故對(duì)于介質(zhì)壓力較低的工況條件，應(yīng)特殊設(shè)定彈簧剛度，規(guī)定裂隙壓力;</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="肅南止回閥電話,止回閥" src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024476875000/9919477.png"></div><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(dòng)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(dǎo)向套簡(jiǎn)，閥瓣導(dǎo)向簡(jiǎn)可在閥盞導(dǎo)向簡(jiǎn)內(nèi)自由升降，當(dāng)介質(zhì)順流時(shí)，閥瓣靠介質(zhì)推力開啟，當(dāng)介質(zhì)停流時(shí)，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(jìn)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(jìn)出口通道方向與閥座通道方向相同，其流動(dòng)阻力較直通式小。旋啟式止回閥有一個(gè)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(diǎn)是阻力大，關(guān)閉時(shí)密封性差。</span> 一種是安裝在水泵前豎吸管端頭，也叫底閥。肅南止回閥電話</p><p style="text-indent:25px">止回閥又叫逆止閥，是一種自動(dòng)閥門。肅南止回閥電話</p><p> <span style="font-size:16px;">倒流防止器和止回閥的區(qū)別1，功能方面倒流防bai止器主要用于防止水的回du流，即使其內(nèi)部所有可能的密封全部失效,仍能確保不發(fā)生dao回流污染事故.是保障水質(zhì)的**技術(shù)措施.止回閥主要用于保證水的單向流動(dòng)，防止水倒流.但無防污性能,當(dāng)止回密封面失效，不能有效防止水的回流污染。設(shè)有倒流防止器的管段,不需要再設(shè)止回閥；反之不能替代。2，結(jié)構(gòu)方面止回閥只有單級(jí)止回密封結(jié)構(gòu),結(jié)構(gòu)長(zhǎng)度小,自重輕減壓型倒流防止器包含有兩個(gè)**止回密封+自動(dòng)感應(yīng)的泄水器,體長(zhǎng)質(zhì)重.低阻力倒流防止器包含兩級(jí)止回密封+**式自動(dòng)泄水器，外形小,自重輕3，水頭損失方面止回閥的水頭損失一般小于；減壓型倒流防止器的水頭損失:一般在。為低壓隔斷形式，如果水損過低,隔斷安全性將無法保證；低阻力倒流防止器的水頭損失小于。</span> 肅南止回閥電話</p><p style="text-indent:25px">甘肅誠(chéng)禹惠物資有限公司是一家服務(wù)型類企業(yè)，積極探索行業(yè)發(fā)展，努力實(shí)現(xiàn)產(chǎn)品創(chuàng)新。甘肅誠(chéng)禹惠物資是一家有限責(zé)任公司企業(yè)，一直“以人為本，服務(wù)于社會(huì)”的經(jīng)營(yíng)理念;“誠(chéng)守信譽(yù)，持續(xù)發(fā)展”的質(zhì)量方針。公司業(yè)務(wù)涵蓋誠(chéng)禹惠閥門，球閥批發(fā)，閥門批發(fā)，蝶閥批發(fā)，價(jià)格合理，品質(zhì)有保證，深受廣大客戶的歡迎。甘肅誠(chéng)禹惠物資順應(yīng)時(shí)代發(fā)展和市場(chǎng)需求，通過**技術(shù)，力圖保證高規(guī)格高質(zhì)量的誠(chéng)禹惠閥門，球閥批發(fā)，閥門批發(fā)，蝶閥批發(fā)。</p></p><br /><p>文章來源地址: 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