河北FSA真空管道蝶閥哪家好頂耕國(guó)際貿(mào)易供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="⑴截止和開(kāi)放介質(zhì)用的閥門(mén)流道為直通式的閥門(mén)，其流阻較小，通常選擇作為截止和開(kāi)放介質(zhì)用的閥門(mén)。向下閉合式閥門(mén)（截止閥、柱塞閥）由于其流道曲折，流阻比其他閥門(mén)高，故較少選用。在允許有較高流阻的場(chǎng)合，可選用閉合式閥門(mén)。⑵控制流量用的閥門(mén)通常選擇易"><meta name="keywords" content="河北FSA真空管道蝶閥哪家好"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta 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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="akhe8f5" 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>河北FSA真空管道蝶閥哪家好</p><p><span>***更新：</span>2020-06-21 12:22:53</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="oifxeln" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">頂耕國(guó)際貿(mào)易（上海）有限公司</a></p><p><span>聯(lián)系人：</span>查劍來(lái)</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="cr83sul" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="jtip8l5" class="box"><p><p> ⑴ 截止和開(kāi)放介質(zhì)用的閥門(mén) </p> <p> 流道為直通式的閥門(mén)，其流阻較小，通常選擇作為截止和開(kāi)放介質(zhì)用的閥門(mén)。向下閉合式閥門(mén)（截止閥、柱塞閥）由于其流道曲折，流阻比其他閥門(mén)高，故較少選用。在允許有較高流阻的場(chǎng)合，可選用閉合式閥門(mén)。 </p> <p> ⑵ 控制流量用的閥門(mén) </p> <p> 通常選擇易于調(diào)節(jié)流量的閥門(mén)作為控制流量用。向下閉合式閥門(mén)（如截止閥）適于這一用途，因?yàn)樗拈y座尺寸與關(guān)閉件的行程之間成正比關(guān)系。旋轉(zhuǎn)式閥門(mén)（旋塞閥、蝶閥、球閥）和撓曲閥體式閥門(mén)（夾緊閥、隔膜閥）也可用于節(jié)流控制，但通常只能在有限的閥門(mén)口徑范圍內(nèi)適用。閘閥是以圓盤(pán)形閘板對(duì)圓形閥座口做橫切運(yùn)動(dòng)，它只有在接近關(guān)閉位置時(shí)，河北FSA真空管道蝶閥哪家好，才能較好地控制流量，故通常不用于流量控制，河北FSA真空管道蝶閥哪家好。 </p> <p> ⑶ 換向分流用的閥門(mén) </p> <p> 根據(jù)換向分流的需要，這種閥門(mén)可有三個(gè)或更多的通道。旋塞閥和球閥較適用于這一目的，因此，大部分用于換向分流的閥門(mén)都選取這類閥門(mén)中的一種。但是在有些情況下，河北FSA真空管道蝶閥哪家好，其他類型的閥門(mén)，只要把兩個(gè)或更多個(gè)閥門(mén)適當(dāng)?shù)叵嗷ミB接起來(lái)，也可作換向分流用。 </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河北FSA真空管道蝶閥哪家好" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494189453/4103674.png"></div><p> 閥門(mén)的種類繁多，說(shuō)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(guó)大多數(shù)習(xí)慣是按壓力和結(jié)構(gòu)種類來(lái)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(guò)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(kāi)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(kāi)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(guò)規(guī)定數(shù)值時(shí)，能自動(dòng)排除過(guò)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(guò)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="河北FSA真空管道蝶閥哪家好" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737496279297/8393517.png"></div><p> 真空閥門(mén)是指閥門(mén)內(nèi)腔為真空狀態(tài)，通常叫負(fù)壓，內(nèi)腔壓力低于大氣壓，用于真空管道系統(tǒng)的閥門(mén)，有真空球閥，真空蝶閥，真空隔膜閥等。介質(zhì)為高純度。 </p> <p> 球閥、閘閥、截止閥等等均能生產(chǎn)成真空閥和普通常規(guī)閥門(mén)。從外形上無(wú)區(qū)別，在閥門(mén)連接部位設(shè)計(jì)上是有分別的，只是細(xì)節(jié)上的問(wèn)題。 </p> <p> 真空閥門(mén)相對(duì)于正壓閥門(mén)具有下列特點(diǎn)： </p> <p> 壓力低于大氣壓，而閥瓣上的壓降不能超過(guò)1公斤力/厘米2。介質(zhì)的工作溫度取決于使用裝置的工藝過(guò)程。溫度一般不超過(guò)-70 ~ +150℃的范圍。 </p> <p> 對(duì)這類閥門(mén)**基本的要求是保證連接的高度密封性和結(jié)構(gòu)與墊片材料的致密性。 </p> <p> 按介質(zhì)壓力真空閥門(mén)可分成四組： </p> <p> 1）低真空閥門(mén)：介質(zhì)壓力p=760~1毫米汞柱； </p> <p> 2）中真空閥門(mén)：p=1×10-3 毫米汞柱。 </p> <p> 3）高真空閥門(mén)：p=1×10-4 ~1×10-7 毫米汞柱； </p> <p> 4）超高真空閥門(mén)：p≤1×10-8 毫米汞柱。 </p> <p> 真空閥門(mén)很多采用的的閥桿作直線運(yùn)動(dòng)的真空波紋管截止閥。閘閥卻受到較大的限制，但大通徑來(lái)說(shuō)，可用的還有球閥、柱塞閥和蝶閥。 </p></p><br /><p>文章來(lái)源地址: 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