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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_diefakna/">蝶閥</a>?甘肅RH真空管道蝶閥維修電話頂耕國際貿(mào)易供應(yīng)</p><div id="vfcuaco" class="leftbox clearfix"><h1>甘肅RH真空管道蝶閥維修電話頂耕國際貿(mào)易供應(yīng)</h1><div id="v8sgsu3" class="proBig"><div id="sgd88s3" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737890507813/9234469.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="k7jb23i" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737890507813/9234469.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="2hpqdtt" 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>甘肅RH真空管道蝶閥維修電話</p><p><span>***更新：</span>2020-06-07 05:14:05</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="kzwognk" 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="ixuwovh" class="page-proshow02"><p class="title">詳細說明</p><div id="3heby32" class="box"><p><p> 壓緊時不艱苦，但耐壓，甘肅RH真空管道蝶閥維修電話、耐溫能力都較差，只用于壓力低、溫度不高方。自然橡膠有一定耐酸堿性能，甘肅RH真空管道蝶閥維修電話，使用溫度不宜跨越60℃；氯丁橡膠也能耐某些酸堿，使用溫度80℃；丁腈橡膠耐油，可用至80℃；氟橡膠耐侵蝕性能很好，耐溫性能也比一般橡膠強，可150℃介質(zhì)中使用。(2)橡膠O形墊圈：斷面外形是正圓，有一定自緊作用，密封效果比平墊圈好，壓緊力更小。(3)塑料平墊圈：塑料**年夜特點是耐侵蝕性好,年夜部門塑料耐溫性能欠好，甘肅RH真空管道蝶閥維修電話。聚四氟乙烯為塑料之冠，耐侵蝕性能優(yōu)良，耐溫范圍比力寬闊，可-180℃～+200℃之內(nèi)持久使用。(4)聚四氟乙烯包墊圈：充實闡揚聚四氟乙烯優(yōu)點，同時彌補它彈性較差錯誤謬誤，做成聚四氟乙烯包裹橡膠或石棉橡膠墊圈。這樣，既同聚四氟乙烯平墊圈一樣耐侵蝕，又有***彈性，增強密封效果，減小壓緊力。(5)石棉橡膠墊圈：由石棉橡膠板剪成。它組分是60～80%石棉和10～20%橡膠，和填充劑、硫化劑等。它有很好耐熱性、耐冷性、化學(xué)穩(wěn)定性，貨源豐碩，價格廉價。使用時，壓緊力沒必要很年夜。它能粘附金屬，比較好概況涂一層石墨粉，以免拆卸時費勁。(6)金屬平熱圈：鉛，耐溫100℃；鋁430℃；銅315℃；低碳鋼550℃；銀650℃；鎳810℃；蒙乃爾(鎳銅)合金810℃。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甘肅RH真空管道蝶閥維修電話" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737890507813/9234469.jpg"></div><p> 它擔任閥門密封直接接觸的面。那閥門密封材料都有哪些呢，我們知道閥門密封圈材料有金屬和非金屬兩大類。閥門密封材料是閥門密封的重要組成部分，它擔任閥門密封直接接觸的面。那閥門密封材料都有哪些呢，我們知道閥門密封圈材料有金屬和非金屬兩大類。下面就簡單介紹一下各類密封材料的使用條件，以及常用的閥門類型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℃，橡膠用于公稱壓力PN≤1MPa的截止閥、閘閥、隔膜閥、蝶閥、止回閥、夾管閥等閥門的密封。2尼龍尼龍具有摩擦系數(shù)小、耐腐蝕性好等特點。尼龍多用于溫度t≤90℃、公稱壓力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℃、公稱壓力PN≤、閘閥、球閥等。4鑄鐵鑄鐵用于溫度t≤100℃、公稱壓力PN≤、煤氣和油類用的閘閥、截止閥、旋塞閥等。5巴氏合金巴氏合金用于溫度t-70~150℃、公稱壓力PN≤。6銅合金銅合金常用材料有6-6-3錫青銅和58-2-2錳黃銅等。銅合金耐磨性好，適用于溫度t≤200℃、公稱壓力PN≤，常用于閘閥、截止閥、止回閥、旋塞閥等。7鉻不銹鋼鉻不銹鋼常用牌號有2Cr13、3Cr13經(jīng)調(diào)質(zhì)處理，耐腐蝕性能好。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甘肅RH真空管道蝶閥維修電話" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129749325380860/6768130.png"></div><p> 美國石油協(xié)會標準API 598是美標閥門**常用的檢驗和壓力試驗標準。制造商標準MSSSP61常作“全開”和“全關(guān)”的鋼制閥門的檢驗，但 </p> <p> <br /> </p> <p> 不適用于控制閥門。美標閥門通常不選用MSS SP61檢驗。API 598適用于下列API標準制造的閥門密封性能試驗： </p> <p> <br /> </p> <p> 法蘭式，凸耳，對夾式和對焊連接止回閥 API 594 </p> <p> <br /> </p> <p> 法蘭、螺紋和對焊連接的金屬旋塞閥 API 599 </p> <p> <br /> </p> <p> 石油和天然氣工業(yè)用DNl00及以下鋼制閘閥截止閥和止回閥 API 602 </p> <p> <br /> </p> <p> 法蘭和對焊連接的耐腐蝕栓接閥蓋閘閥 API 603 </p> <p> <br /> </p> <p> 法蘭、螺紋和對焊連接的金屬球閥 API 608 </p> <p> <br /> </p> <p> 雙法蘭式，凸耳和對夾式蝶閥 APl609 </p> <p> <br /> </p> <p> 工程設(shè)計中應(yīng)注意：API 598--2004與1996版相比，取消了對API 600((石油和天然氣工業(yè)用螺栓連接閥蓋鋼制閘閥》的檢驗和壓力試驗。API 600一2001(ISO 10434--1998)標準規(guī)定閥門的密封性能試驗參照ISO 5208，但標準中表17和表18的泄漏量卻同API 598--1996標準的規(guī)定，而不是采用ISO5208的密封等級分類法。2009年9月1 13實施的API 600標準中糾正了2001版中的這個矛盾，規(guī)定閥門的密封性能試驗按照API 598，但沒有規(guī)定版本，這又與API 598--2004相矛盾。因此，工程設(shè)計中選用API 600和其密封性能試驗API 598標準時一定要明確標準的版本，確保標準內(nèi)容的統(tǒng)一性。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甘肅RH真空管道蝶閥維修電話" src="http://tyunfile.71360.com/WaterMark/UploadFile/shdign/637129737494296875/9390800.png"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/174111.html</p></div></div></div></div></div><div id="dc8ro7o" 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