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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>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>浙江真空精煉真空管道蝶閥廠家供應(yīng)</p><p><span>***更新：</span>2020-06-09 10:22:12</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="b82zgi8" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">頂耕國際貿(mào)易（上海）有限公司</a></p><p><span>聯(lián)系人：</span>查劍來</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: </span>021-61637356</p><p><span>地址: </span>大葉公路5225號1幢2370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="lfc8zg8" class="page-proshow02"><p class="title">詳細說明</p><div id="7yv9g33" class="box"><p><p> 鋼制閥門的密封面一般采用堆焊方法制造。用于閥門堆焊的材料按合金類型分為4大類,即鈷基合金、鎳基合金，浙江真空精煉真空管道蝶閥廠家供應(yīng)、鐵基合金和銅基合金。這些合金材料被制成電焊條、焊絲(含藥芯焊絲)、焊劑(含過渡合金型焊劑)和合金粉末等,采用手工電弧焊、氧乙炔焰焊、鎢極氬弧焊、埋弧自動焊和等離子弧焊等方法堆焊。選用閥門密封面堆焊材料一般根據(jù)閥門的使用溫度、工作壓力和介質(zhì)的腐蝕性,或閥門的類型、密封面結(jié)構(gòu)形式、密封比壓和許用比壓,或企業(yè)生產(chǎn)制造條件、設(shè)備加工能力和堆焊技術(shù)能力及用戶要求。還應(yīng)采用優(yōu)化設(shè)計,在滿足閥門使用性能的條件下,選用價格低、生產(chǎn)工藝簡單和生產(chǎn)效率高的密封面材料。用于閥門密封面堆焊的材料有的只有一種形態(tài),或電焊條或焊絲或合金粉末,因而只能采用一種堆焊方法。有的制成電焊條、焊絲或合金粉末多種形態(tài),如stellitel6合金,既有電焊條(D802),又有焊絲(HS111)和合金粉末(PT2102),則可采用手工電弧焊、氧2乙炔焰焊、鎢極氬弧焊、送絲等離子弧焊和粉末等離子弧焊等多種方法堆焊。在選擇閥門密封面堆焊材料時,應(yīng)兼顧選擇本企業(yè)技術(shù)成熟、工藝簡單，浙江真空精煉真空管道蝶閥廠家供應(yīng)、生產(chǎn)效率高的堆焊方法，浙江真空精煉真空管道蝶閥廠家供應(yīng),從而在密封面堆焊制造上保證實現(xiàn)其使用性能。密封面是閥門的關(guān)鍵部位。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江真空精煉真空管道蝶閥廠家供應(yīng)" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494189453/4103674.png"></div><p> 密封面是閥門**關(guān)鍵的工作面，密封面質(zhì)量的好壞關(guān)系到閥門的使用壽命，通常密封面材料要考慮耐腐蝕，耐擦傷，耐沖蝕，抗氧化等因素。通常分兩大類：（一）軟質(zhì)材料1、橡膠（包括丁睛橡膠，氟橡膠等）2、塑料（聚四氟乙烯，尼龍等）（二）硬密封材料1、銅合金（用于低壓閥門）2、鉻不銹鋼（用于普通高中壓閥門）3、司太立合金（用于高溫高壓閥門及強腐蝕閥門）4、鎳基合金（用于腐蝕性介質(zhì)）閥桿材料閥桿在閥門開啟和關(guān)閉過程中，承受拉、壓和扭轉(zhuǎn)作用力，并與介質(zhì)直接接觸，同時和填料之間還有相對的摩擦運動，因此閥桿材料必須保證在規(guī)定溫度下有足夠的強度和沖擊韌性，有一定的耐腐蝕性和抗擦傷性，以及良好的工藝性。常用的閥桿材料有以下幾種。一、碳素鋼用于低壓和介質(zhì)溫度不超過300℃的水、蒸汽介質(zhì)時，一般選用A5普通碳素鋼。用于中壓和介質(zhì)溫度不超過450℃的水、蒸汽介質(zhì)時，一般選用35質(zhì)量碳素鋼。二、合金鋼用于中壓和高壓，介質(zhì)溫度不超過450℃的水、蒸汽、石油等介質(zhì)時，一般選用40Cr（鉻鋼）。用于高壓、介質(zhì)溫度不超過540℃的水、蒸汽等介質(zhì)時，可選用38CrMoALA滲氮鋼。用于高壓、介質(zhì)溫度不超過570℃的蒸汽介質(zhì)時，一般選用25Cr2MoVA鉻鉬釩鋼。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江真空精煉真空管道蝶閥廠家供應(yīng)" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737496894532/5616452.png"></div><p> (1)閥體和閥蓋的質(zhì)量，特別是在鍛造或鑄造時應(yīng)避免其產(chǎn)生折疊、夾渣、氣孔、組織疏散、隱裂紋等缺點和成分不均。 </p> <p> <br /> </p> <p> (2)閥桿和閥體連接處零件等的加工質(zhì)量，特別是閥桿和填料函的粗糙度、閥桿的直線度、閥蓋填料函孔的垂直度和加工的精度。 </p> <p> <br /> </p> <p> (3)閥門填料函的結(jié)構(gòu)選擇，由于閥桿處的密封為動密封，閥桿在轉(zhuǎn)動或滑動過程中填料容易磨損，需選用特制的低泄漏填料密封及填料密封組合，并嚴格控制填料與閥桿的間隙，填料與填料箱的間隙。 </p> <p> <br /> </p> <p> 綜上所述，閥門類型的選用除了滿足工藝條件和標準規(guī)范外，還應(yīng)充分考慮各種使用工況，工程設(shè)計中應(yīng)力求選用的閥門密封等級滿足安全、合理和經(jīng)濟的原則。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江真空精煉真空管道蝶閥廠家供應(yīng)" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737718496094/8657721.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/201690.html</p></div></div></div></div></div><div id="8f3b2rl" class="page-right twoColRt"><div id="fumbikw" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="kz3a9pm" 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" 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