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<meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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href="http://www.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="oi8xnf8" class="twoCol"><div id="sg47i8d" 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>?海北州止回閥批發(fā)價格甘肅誠禹惠物資供應(yīng)</p><div id="dcmd3o3" class="leftbox clearfix"><h1>海北州止回閥批發(fā)價格甘肅誠禹惠物資供應(yīng)</h1><div id="po9hzgn" class="proBig"><div id="rqa27kj" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024375351562/9522742.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="8llisur" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024375351562/9522742.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="y8b3w9f" 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>海北州止回閥批發(fā)價格,止回閥</p><p><span>***更新：</span>2021-01-28 05:11:49</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="37y4nc8" 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(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="icm7xry" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="wqnpwi7" class="box"><p><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(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，海北州止回閥批發(fā)價格，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，海北州止回閥批發(fā)價格，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，海北州止回閥批發(fā)價格，減弱水力沖擊。</span> 常在閥的通道隔板上設(shè)置多個閥瓣，成為多瓣式;海北州止回閥批發(fā)價格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="海北州止回閥批發(fā)價格,止回閥" src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024375351562/9522742.png"></div><p> <span style="font-size:16px;">倒流防止器和止回閥是消防行業(yè)內(nèi)比較常見的兩個概念，字面意思來看兩者的作用都是防止介質(zhì)回流、強制單向流動，但是對于兩者的關(guān)系，初學(xué)者大多有點模糊不清。首先對兩者的定義作一個簡單的介紹：止回閥：又稱單向閥或者逆止閥，依靠介質(zhì)本身流動而自動開、閉閥瓣，用來防止介質(zhì)倒流。倒流防止器：一種采用止回部件組成的可防止給水管道水流倒流的裝置單從定義來看，很難發(fā)現(xiàn)兩者有何不同，“中成教育”從構(gòu)造、作用和設(shè)置的部位等3個方面來對比二者的區(qū)別。止回閥：主要用于保證介質(zhì)的單向流動，防止介質(zhì)倒流.但無防污性能,當(dāng)止回密封面失效，不能有效防止介質(zhì)的回流污染。2、倒流防止器：防止介質(zhì)的回流（即使其內(nèi)部所有可能的密封全部失效,仍能確保不發(fā)生回流污染事故），防止上下游的介質(zhì)發(fā)生接觸</span><span style="font-size:16px;">。</span> 海北州止回閥批發(fā)價格止回閥的安裝位置如何確定？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="海北州止回閥批發(fā)價格,止回閥" src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024327724609/9438807.png"></div><p> <span style="font-size:16px;">有哪些判斷標(biāo)準(zhǔn)來選擇適合的止回閥1、止回閥被大量運用主要是為了阻止流質(zhì)的逆向流動。在一些特定的設(shè)備和管道上如果需要流質(zhì)單向的流動則應(yīng)該加裝止回閥；2、止回閥的適用范圍一般都是比較干凈清潔的流體，不適用于粘度大以及含有固體顆粒和污水的流體系統(tǒng)當(dāng)中；3、立式升降止回閥一般都用于管徑在5cm左右的水平管道上；4、相對于立式升降止回閥而言直通式升降止回閥不*可以運用于水平管道上，在垂直管道中也得到了大量的運用；底閥在大多數(shù)情況下都是用于泵進(jìn)口的垂直管道上的，所以如果是水泵的進(jìn)口管路一般都用底閥，并且通常情況而言流體都是從下往上流動的情況；6、對于升降式旋轉(zhuǎn)止回閥而言它擁有良好的密封性，這是其他止回閥無法比擬的，但是它的運用范圍要小很多，一般臥式的都安裝在水</span><span style="font-size:16px;">平管道上，而立式的則多用于垂直管道。</span> </p><p> <span style="font-size:16px;">水錘是在突然停電或者在閥門關(guān)閉太快時,由于壓力水流的慣性,產(chǎn)生水流沖擊波,就象錘子敲打一樣,所以叫水錘。泵站水錘有啟動水錘、關(guān)閥水錘和停泵水錘（由于突然停電等原因形成的）。前兩種水錘在正常操作程序下，不會引起危及機組安全的問題。后者形成的水錘壓力值往往很大，從而釀成事故。所謂停泵水錘是指突然斷電或其他原因造成開閥停車時，在水泵和壓力管道中由于流速的突然變化而引起壓力升降的水力沖擊現(xiàn)象。例如電力系統(tǒng)或電器設(shè)備發(fā)生故障、水泵機組偶發(fā)故障等原因，都可能發(fā)生離心泵開閥停車，從而引發(fā)停泵水錘。停泵水錘的比較高壓力可達(dá)正常工作壓力的200%，甚至更高可以使管道及設(shè)備擊毀，一般事故造成“跑水”、停水；嚴(yán)重事故造成泵房被淹、設(shè)備損壞、設(shè)施被毀，甚至于造成人身傷亡事</span><span style="font-size:16px;">故。</span> 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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="海北州止回閥批發(fā)價格,止回閥" src="https://tyunfile.71360.com/UploadFile/gscyhwz/637318024300068359/4895710.png"></div><p> <span style="font-size:16px;">止回閥是指依靠介質(zhì)本身流動而自動開、閉閥瓣，用來防止介質(zhì)倒流的閥門，又稱逆止閥、單向閥、逆流閥、和背壓閥。止回閥屬于一種自動閥門，其主要作用是防止介質(zhì)倒流、防止泵及驅(qū)動電動機反轉(zhuǎn)，以及容器介質(zhì)的泄放止回閥根據(jù)其結(jié)構(gòu)和安裝方式主要分為：升降式止回閥、旋啟式止回閥、蝶式止回閥、管道式止回閥和壓緊式止回閥。作為配管專業(yè)當(dāng)然就是要考慮止回閥的安裝方式</span><span style="font-size:16px;">了。止回閥的安裝要求：1.升降式止回閥，閥瓣是沿著閥體垂直中心線滑動的止回閥，閥門型號是H41——，升降式止回閥只能安裝在水平管道上。2.旋啟式止回閥，閥瓣是圍繞閥座外的銷軸旋轉(zhuǎn)的止回閥，閥門型號是H44——，水平和垂直管道都可以，只是安裝方向有要求。不過比較好還是水平安裝，當(dāng)然對于介質(zhì)流動方向為從下到上的，也可以垂直安裝。3.碟式止回閥，閥瓣圍繞閥座內(nèi)的銷軸旋轉(zhuǎn)，閥門型號是H45——，碟式止只能安裝在水平管道上。4.管道式止回閥，它的閥瓣是沿著閥體中心線滑動的閥門，水平和垂直方向都可以，但是也是需要注意安裝方向的。5.壓緊式止回閥：一般是鍋爐給水和蒸汽切斷用閥，它具有升降式止回閥和截止閥或角閥的綜合機能，也是需要水平安裝。</span> 止回閥的安裝位置如何確定呢？隴南止回閥聯(lián)系人</p><p style="text-indent:25px">當(dāng)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。海北州止回閥批發(fā)價格</p><p> <span style="font-size:16px;">止回閥啟閉動作較為頻繁，內(nèi)部連接部分及密封部件容易發(fā)生損壞，為便于修理，防止發(fā)生由于止回閥故障而停運整個系統(tǒng)的情況，從這個角度考慮，止回閥會裝在出口閘閥或蝶閥之前，止回閥有多種樣式，它們使用不同的機制來阻止倒流，包括盤，球，活塞和其他形式。流量可以是直通，成角度或舉升形式。每種類型的止回閥都有其優(yōu)勢。旋啟式止回閥可允許使用通過管道的清管器清潔或檢查管道。其他人在垂直流方面表現(xiàn)比較好。有些可以在線維修。某些含有固體或纖維材料的可耐受流動。配件可以微調(diào)閥門的性能。杠桿和配重，彈簧，氣墊或減震器的各種組合可幫助控制閥門的關(guān)閉速度以匹配應(yīng)用，并防止閥門猛擊和水錘問題。其他附件，例如位置指示器，提供操作信息。Bregman說，在許多應(yīng)用中，比較好包括一個</span><span style="font-size:16px;">反</span><span style="font-size:16px;">沖洗裝置，以***積聚在閥門底部的任何碎屑。</span> 海北州止回閥批發(fā)價格</p><p style="text-indent:25px">甘肅誠禹惠物資有限公司主要經(jīng)營范圍是機械及行業(yè)設(shè)備，擁有一支專業(yè)技術(shù)團隊和良好的市場口碑。公司業(yè)務(wù)涵蓋誠禹惠閥門，球閥批發(fā)，閥門批發(fā)，蝶閥批發(fā)等，價格合理，品質(zhì)有保證。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠信為本的理念，打造機械及行業(yè)設(shè)備良好品牌。甘肅誠禹惠物資立足于全國市場，依托強大的研發(fā)實力，融合前沿的技術(shù)理念，飛快響應(yīng)客戶的變化需求。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3044242.html</p></div></div></div></div></div><div id="rvx7jln" class="page-right twoColRt"><div id="rb28axz" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="smjq2q8" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="hw2byv2" class="recomPic 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