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class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749327031250/8086057.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="3mt2fmd" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749327031250/8086057.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="u8q4pqm" 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>甘肅鋼廠真空管道蝶閥制造廠家</p><p><span>***更新：</span>2020-05-31 06:16:12</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="fdu8g7u" 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="zsjio88" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="pxokwvr" class="box"><p><p> 常用的通徑單位有mm、寸、分，寸用”表示一、1寸=二、寸是公稱(chēng)直徑的英制叫法，mm是國(guó)標(biāo)公制叫法三，甘肅鋼廠真空管道蝶閥制造廠家、在管道的規(guī)格上沒(méi)有***的換算公式，對(duì)于小于100只能以1寸=25來(lái)模糊計(jì)算，甘肅鋼廠真空管道蝶閥制造廠家，甘肅鋼廠真空管道蝶閥制造廠家，取其相近的數(shù)，對(duì)于大于100的管子用1寸=25可以完全匹配計(jì)算。深圳名閥常用的如下：公稱(chēng)直徑DN6對(duì)應(yīng)的俗稱(chēng)1分1/8寸公稱(chēng)直徑DN8對(duì)應(yīng)的俗稱(chēng)2分1/4寸公稱(chēng)直徑DN10對(duì)應(yīng)的俗稱(chēng)3分3/8寸公稱(chēng)直徑DN15對(duì)應(yīng)的俗稱(chēng)4分1/2寸公稱(chēng)直徑DN20對(duì)應(yīng)的俗稱(chēng)6分3/4寸公稱(chēng)直徑DN25對(duì)應(yīng)的俗稱(chēng)1寸公稱(chēng)直徑DN32對(duì)應(yīng)的俗稱(chēng)1寸2分11/4”公稱(chēng)直徑DN40對(duì)應(yīng)的俗稱(chēng)1寸半11/2”公稱(chēng)直徑DN50對(duì)應(yīng)的俗稱(chēng)2寸公稱(chēng)直徑DN65對(duì)應(yīng)的俗稱(chēng)2寸半公稱(chēng)直徑DN80對(duì)應(yīng)的俗稱(chēng)3寸公稱(chēng)直徑DN100對(duì)應(yīng)的俗稱(chēng)4寸公稱(chēng)直徑DN125對(duì)應(yīng)的俗稱(chēng)5寸公稱(chēng)直徑DN150對(duì)應(yīng)的俗稱(chēng)6寸公稱(chēng)直徑DN200對(duì)應(yīng)的俗稱(chēng)8寸以此類(lèi)推。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甘肅鋼廠真空管道蝶閥制造廠家" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749327031250/8086057.png"></div><p> <p> 國(guó)外閥門(mén)密封等級(jí)的選用 </p> 前蘇聯(lián)對(duì)閥門(mén)密封等級(jí)分類(lèi)主要是20世紀(jì)50年代應(yīng)用，隨著前蘇聯(lián)的解體，現(xiàn)大多數(shù)國(guó)家都不選用此密封等級(jí)分類(lèi)，而是選用歐美標(biāo)準(zhǔn)的密 </p> <p> <br /> </p> <p> 封等級(jí)分類(lèi)。歐洲標(biāo)準(zhǔn)EN 12266—1密封等級(jí)分類(lèi)符合國(guó)際標(biāo)準(zhǔn)化組織標(biāo)準(zhǔn)ISO 5208的規(guī)定，但缺AA、CC和EE三個(gè)等級(jí)。ISO 5208與1999版相比，新增了AA、CC、E、EE、F和G六個(gè)等級(jí)。ISO 5208標(biāo)準(zhǔn)給出了與API 598和EN 12266標(biāo)準(zhǔn)幾個(gè)密封等級(jí)的比較。 </p> <p> <br /> </p> <p> ④。其他公稱(chēng)尺寸密封等級(jí)的比較可按口徑計(jì)算泄漏量得出 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甘肅鋼廠真空管道蝶閥制造廠家" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749325380860/6768130.png"></div><p> 閥門(mén)密封是整個(gè)閥門(mén)中**重要的組成部分，其主要目的就是防止泄露，閥門(mén)密封座也叫密封圈，它是直接接與管路內(nèi)介質(zhì)接觸，并且阻止介質(zhì)流通的一個(gè)組織。閥門(mén)在使用中，管道內(nèi)有各種不同的介質(zhì)，如液體、氣體、油品、腐蝕性的介質(zhì)等等，而不同的閥門(mén)的密封件，使用的地方也不一樣，能夠適應(yīng)各種不同的介質(zhì)。那么，閥門(mén)密封件材料主要可以分成兩大類(lèi)，即為金屬材料和非金屬材料，非金屬密封一般多用于常溫常壓的管道，而金屬密封而使用范圍則比較廣，可用于高溫高壓！下面就簡(jiǎn)單介紹一下各類(lèi)密封材料的使用條件，以及常用的閥門(mén)類(lèi)型。1、合成橡膠合成橡膠的耐油、耐溫、耐腐蝕等綜合性能優(yōu)于天然橡膠。一般合成橡膠的使用溫度t≤150℃，天然橡膠t≤60℃，橡膠用于公稱(chēng)壓力PN≤1MPa的截止閥、閘閥、隔膜閥、蝶閥、止回閥、夾管閥等閥門(mén)的密封。2、尼龍尼龍具有摩擦系數(shù)小、耐腐蝕性好等特點(diǎn)。尼龍多用于溫度t≤90℃、公稱(chēng)壓力PN≤32MPa的球閥、截止閥等。3、聚四氟乙烯聚四氟乙烯多用于溫度t≤232℃、公稱(chēng)壓力PN≤、閘閥、球閥等。4、鑄鐵鑄鐵用于溫度t≤100℃、公稱(chēng)壓力PN≤、煤氣和油類(lèi)用的閘閥、截止閥、旋塞閥等。5、巴氏合金巴氏合金用于溫度t-70~150℃、公稱(chēng)壓力PN≤。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甘肅鋼廠真空管道蝶閥制造廠家" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737896250000/4170655.jpg"></div></p><br /><p>文章來(lái)源地址: 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