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<script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://m.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 id="qgqbi"></u><noframes id="qgqbi"></noframes><menu 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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ji2egip" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shzpzkgs/637364813920146485/6119494.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="icryaho" class="content"><p><span>需求數量：</span>0</p><p><span>價格要求：</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>產品關鍵詞：</span>羅茨真空泵油價格,羅茨真空泵</p><p><span>***更新：</span>2021-02-03 05:20:53</p><p><span id="click" >瀏覽次數：3次</span></p><a rel="nofollow" class="button">聯系我們</a></div></div><div id="cwdvhjq" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海卓帕真空技術有限公司</a></p><p><span>聯系人：</span>范裕軍</p><p><span>郵箱: </span>469585075@qq.com</p><p><span>電話: </span>17317798775</p><p><span>傳真: </span>021_</p><p><span>網址: </span>http://www.zapavac.cn</p><p><span>手機: </span>021-52999935</p><p><span>地址: </span>曹楊路1017號一幢三樓3193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="gasegnz" class="page-proshow02"><p class="title">詳細說明</p><div id="dsf3fzb" class="box"><p><p style="text-indent:25px">羅茨泵不能將被抽的氣體直接排向大氣，羅茨真空泵油價格，這樣它就必須配置前級真空泵，使羅茨泵的排氣端造成一定的預真空，否則不能獲得較高的真空度。并且會因過載過熱使轉子卡住甚至損壞。羅茨泵所需的前級泵，根據抽氣系統的用途，可以選用能從大氣壓開始運轉的泵，如油封機械其空泵、水環(huán)真空泵、以及帶有大氣噴射器的水環(huán)式真空泵等。前級泵的大小，羅茨真空泵油價格，根據使用的條件和前級泵的抽氣特性，一般宜選用羅茨泵抽速的1/10-1/2。當泵在較高壓力下連續(xù)運轉時，應選用大抽速的前級泵，羅茨真空泵油價格，當泵在較高真空度下進行工作時，選用小抽速的前級泵。羅茨真空泵常被串聯在擴散泵與油封式機械真空泵之間，用來提高中間壓力范圍的抽氣量。羅茨真空泵油價格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="羅茨真空泵油價格,羅茨真空泵" src="https://tyunfile.71360.com/UploadFile/shzpzkgs/637364813920146485/6119494.png"></div><p style="text-indent:25px">羅茨真空泵在運輸與貯存中的作用：溫度原油從油層開采出來的原油中，總是伴有數量不等的低分子量的甲烷、乙烷、丙烷等烴類氣體和硫化氫氣體，這些氣體必須在貯運和蒸餾之前除去，使原油得穩(wěn)定。同時將低分子烴氣揮發(fā)時所帶走的航空汽油成分，特別是它們的異構物(嫩料中具有高度抗震性能的烴類)得以回收和利用。為了減少原油在貯運過程中的過多損失，穩(wěn)定原油及汽油產品成分，并在貯存中不易改變餾分的組成，在國外的一些油田中，建立了大型的真空原油穩(wěn)定裝置，在310-350mmHg的真空度下對原油進行脫氣以達到穩(wěn)定原油的目的。羅茨真空泵油價格羅茨泵的壓縮過程中產生的熱量被傳到轉子和泵體上。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="羅茨真空泵油價格,羅茨真空泵" src="https://tyunfile.71360.com/UploadFile/shzpzkgs/637425239725104389/6946834.png"></div><p style="text-indent:25px">直排大氣的濕式羅茨真空泵的極限真空不高，一般約為60~40Torr，其真空度高低與泵制造的質量有關。不過這種羅茨真空泵常常是用在抽粗真空的場合，所要求的真空度比極限真空低得多，因此這種泵的極限真空對使用來說意義不大。在試驗羅茨真空泵的極限真空時，按照部頒標準規(guī)定一般要求開動10~20min以達到極限真空，同時還要注意泵的濕度應保持正常。新出廠的羅茨真空泵達到極限壓強的時間可能更長一些，因為零件上可能有易揮發(fā)的清洗液，或因泵的潤滑油吸收了水份和氣體，需要一定的時間才能充分揮發(fā)。比較好能試驗二、三次，以便加以比較。</p><p style="text-indent:25px">羅茨真空泵在運輸與貯存中的作用：真空制冷為了把原油中分離出來的丙烷和丁烷等在常壓鐮中很方便地貯存起來，過去采用深度冷凍的辦法使其液化，但目前國外有很多廠家采用真空制冷，使冷凍的部分丙烷在真空下蒸發(fā)，便能很容易地得到低于一48℃的低溫，然后把丙烷和丁烷分別在-48℃和-10℃的低溫下液化，裝罐貯存或運輸。排出油罐中的空氣沒有經過穩(wěn)定的原油裝入貯罐中后，由于輕組分揮發(fā)的緣故，當油罐“呼吸”時，會造成大量的損失。如果利用真空裝置對貯罐進行抽空，就能使液化石油氣(丙烷和丁烷)及液化天然氣(甲烷和乙烷)被除掉、并加以回收和利用。羅茨泵故障所帶來的意外停機停產也影響著生產的效率和產品的質量，加大了企業(yè)的成本投入。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="羅茨真空泵油價格,羅茨真空泵" src="https://tyunfile.71360.com/UploadFile/shzpzkgs/637425239483141491/169413.png"></div><p style="text-indent:25px">羅茨真空泵在顯示器件方面，錄象磁頭、高密度錄象帶以及平面顯示裝置的透明導電膜、攝像管光導膜、顯示管熒光屏的鋁襯等也都是采用真空鍍膜法制備。在元件方面，在真空中蒸發(fā)鎳鉻，鉻或金屬陶瓷可以制造電阻，在塑料上蒸發(fā)鋁、一氧化硅、二氧化鈦等可以制造電容器，蒸發(fā)硒可以得到靜電復印機用的硒鼓、蒸發(fā)鈦酸鋇可以制造磁致伸縮的起聲元件等等。真空蒸發(fā)還可以用于制造超導膜和慣性約束巨變反應用的微珠鍍層。此外還可以對珠寶、鐘表外殼表面、紡織品金屬花紋、金絲銀絲線等蒸鍍裝飾用薄膜，以及采用濺射鍍或離子鍍對刀具、模具等制造超硬膜。近兩年內所興起的多弧離子鍍制備鈦金制品，如不銹鋼薄板、鏡面板、包柱、扶手、較好的床托架、樓梯欄桿等目前正在盛行。羅茨泵的極限真空除取決于泵本身結構和制造精度外，還取決于前級泵的極限真空。羅茨真空泵油價格</p><p style="text-indent:25px">茨泵是一種無內壓縮的真空泵，通常壓縮比很低，故高、中真空泵需要前級泵。羅茨真空泵油價格</p><p style="text-indent:25px">近一段時期，中美貿易摩擦持續(xù)影響對外貿易發(fā)展，機械行業(yè)銷售企業(yè)通過多種渠道加強深化與傳統貿易伙伴的合作，并積極拓展新貿易伙伴、謀求新發(fā)展。在機械行業(yè)中主要研發(fā)產品有真空泵，分子泵，羅茨泵，凍干泵等，現如今在市場經濟體制的影響下，企業(yè)為積極參與市場競爭，實施品牌戰(zhàn)略，大力發(fā)展自主品牌，創(chuàng)立了自己的品牌，才能在競爭中贏得一席之地。同時，環(huán)保政策將趨向嚴格——2020年起將加速私營合伙企業(yè)“國三”標準以下設備報廢清退;起重機與挖機不同，屬于道路移動機械，環(huán)保政策更為嚴格，設備報廢清退執(zhí)行更為徹底，目前可銷售設備為“國五”及以上，但存量設備有一半左右為“國四”及以下標準，2019年7月開始推行“國六”，判斷“國三”、“國四”清退也為“國六”設備銷售騰挪空間。實施轉換的獨一途徑是依靠科技創(chuàng)新驅動發(fā)展。真空技術領域內的技術開發(fā)、技術咨詢、技術服務、技術轉讓、銷售、真空設備、真空泵、機電設備、機械設備及配件、自動化設備、儀器儀表、橡膠制品、五金交電、金屬材料、化工原料（除危險化學品、監(jiān)控化學品、民用物品、煙花爆竹、易制毒化學品），從事貨物及技術的進出口業(yè)務。是我國真空技術領域內的技術開發(fā)、技術咨詢、技術服務、技術轉讓、銷售、真空設備、真空泵、機電設備、機械設備及配件、自動化設備、儀器儀表、橡膠制品、五金交電、金屬材料、化工原料（除危險化學品、監(jiān)控化學品、民用物品、煙花爆竹、易制毒化學品），從事貨物及技術的進出口業(yè)務。工業(yè)的裝備技術基礎，圍繞真空技術領域內的技術開發(fā)、技術咨詢、技術服務、技術轉讓、銷售、真空設備、真空泵、機電設備、機械設備及配件、自動化設備、儀器儀表、橡膠制品、五金交電、金屬材料、化工原料（除危險化學品、監(jiān)控化學品、民用物品、煙花爆竹、易制毒化學品），從事貨物及技術的進出口業(yè)務。工業(yè)結構調整的需要，發(fā)展**真空技術領域內的技術開發(fā)、技術咨詢、技術服務、技術轉讓、銷售、真空設備、真空泵、機電設備、機械設備及配件、自動化設備、儀器儀表、橡膠制品、五金交電、金屬材料、化工原料（除危險化學品、監(jiān)控化學品、民用物品、煙花爆竹、易制毒化學品），從事貨物及技術的進出口業(yè)務。裝備技術，提高國產真空技術領域內的技術開發(fā)、技術咨詢、技術服務、技術轉讓、銷售、真空設備、真空泵、機電設備、機械設備及配件、自動化設備、儀器儀表、橡膠制品、五金交電、金屬材料、化工原料（除危險化學品、監(jiān)控化學品、民用物品、煙花爆竹、易制毒化學品），從事貨物及技術的進出口業(yè)務。裝備制造水平，是我國真空技術領域內的技術開發(fā)、技術咨詢、技術服務、技術轉讓、銷售、真空設備、真空泵、機電設備、機械設備及配件、自動化設備、儀器儀表、橡膠制品、五金交電、金屬材料、化工原料（除危險化學品、監(jiān)控化學品、民用物品、煙花爆竹、易制毒化學品），從事貨物及技術的進出口業(yè)務。產業(yè)由大轉強的重要基礎和關鍵。羅茨真空泵油價格</p></p><br 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