sm电影系列番号

<form id=oMSZuZBgN><nobr id=oMSZuZBgN></nobr></form>

<address id=oMSZuZBgN><nobr id=oMSZuZBgN><nobr id=oMSZuZBgN></nobr></nobr></address>

13360485616

專業矽橡膠制品定制生産廠家

資料下載 | 視頻中心 | 加入萊鑫

矽膠首頁

定制矽膠産品

矽膠按鍵P+R

矽膠首頁 >> 新聞資訊 >>新聞資訊 >>行業新聞 >> 密封圈材料及使用條件

详细内容

密封圈材料及使用條件

密封圈材料及使用條件

閥門密封圈材料有金屬和非金屬兩大類。矽膠制品廠吸附作用主要是物理吸附，可以再生和反複使用。在堿金屬矽酸鹽（如矽酸鈉）溶液中加酸，使之酸化，再加入一定量的電解質進行攪拌，即生成矽酸凝膠；或者在較濃的矽酸鈉溶液中加酸或铵鹽也能生成矽酸凝膠。深圳矽膠制品廠将硅酸凝胶静置几小时使之老化，然后用热水洗去可溶性盐类,在60～70℃下烘干并在约300℃时活化，即可得矽膠。　将硅酸凝胶用氯化钴溶液浸泡后再烘干和活化，可得变色矽膠。常用材料及其使用条件见表7-6。

表7-6密封圈常用材料和使用條件

密封面材料

性能及使用條件

天然橡膠

合成橡膠

合成橡膠的耐油、耐温、耐腐蚀等综合性能优于天然橡膠。一般合成橡膠的使用温度t≤150℃，

天然具有橡膠t≤60℃，橡膠主要用于選擇公稱工作壓力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

尼龍

尼龍摩擦系数低，耐腐蚀性好。尼龍主要用于温度t ≤ 90 ℃、公称压力PN ≤ 32MPa的球阀和截止阀

聚四氟乙烯

大部分聚四氟乙烯适用于截止阀、闸阀、温度 T ≤232 ° C 和公称压力 PN ≤6.4 mpa 的球阀

鑄鐵

用于閘閥、截止閥、旋塞閥等。適用于溫度t≤100℃、公稱壓力PN≤1.6MPa的油氣。

巴氏合金

用于環境溫度t:-70～150℃、公稱工作壓力PN≤2.5MPa的氨用截止閥

銅合金

常用的材料是6-6-3锡青铜和58-2-2锰黄铜。銅合金耐磨性好，适用于温度 ≤ 200 ℃，水和蒸汽中标称压力PN ≤ 1.6MPa，常用于闸阀、截止阀、止回阀、旋塞阀等

鉻不鏽鋼

常见品牌有2CR13、3 CR13经调理处理，耐腐蚀性好。常用于温度 T ≤450 ° C，公称压力 PN ≤32mpa 的水、蒸汽和油等介质上的阀门

鉻鎳钛不鏽鋼

常用品牌爲1Cr18Ni9Ti，具有良好的耐腐蝕性、耐侵蝕性和耐熱性。適用于溫度t≤600℃，公稱壓力PN≤6.4MPa的蒸汽、硝酸等介質，用于截止閥和球閥。

滲氮鋼

常用材料牌號是38CrMoAlA，經滲碳技術處理，具有一個良好的耐腐蝕性和抗擦傷性。常用于環境溫度t≤540℃、公稱工作壓力PN≤10MPa的電站采用閘閥

滲硼

密封面直接由阀体或阀盘的阀体材料加工而成，再进行滲硼表面处理，密封面具有良好的耐磨性。电站排水阀

关键词: 密封圈价格，密封圈厂家，密封圈哪个好

密封圈材料及使用條件

上一篇密封圈的常見種類下一篇密封件進行失效的主要問題原因有哪些呢？

2022—2028 东莞莱鑫硅橡胶模具制品有限公司版权所有 [粤ICP备粤ICP备13051156号 ]

电话：0769-82887949 13826535047 徐经理

傳真：0769-89026025 郵箱：sales@laixinsilicone.com

地址：東莞市虎門鎮大甯工業區康甯路1號（主營生活日用矽膠制品）

矽膠制品硅橡胶制品矽膠按鍵矽膠密封圈矽膠表带手机矽膠套矽膠制品廠

本網站有易網拓提供技術支持與服務

關于我們

關于萊鑫

企業榮譽

電子樣冊

合作夥伴

産品服務

矽膠制品定制

矽膠按鍵

矽膠餐具

矽膠密封圈

客戶案例

品牌合作大客戶

定制客戶案例

经典客戶案例

行业合作客戶案例

服務與支持

技術支持

産品培訓

現場技術支援

資料下載中心

聯系我們

聯系我們

加入我們

电话直呼
- 0769-82887949
- 13424359143
- 13360485616
- 石经理：
- 陶经理：
微信掃一掃
发送邮件
企业位置

seo

seo

Except in such moments, however, the war seemed farther away than it had for months and months. But about eleven o'clock we began to find the way scored by the fresh ruts of heavy wheels and the dust deepened by hundred of hoofs. The tops and faces of the roadside banks were newly trampled and torn by clambering human feet. Here was a canteen, smashed in a wheel-track; yonder a fragment of harness; here lay a broken hame, there was the half of a russet brogan and yonder a ragged sock stained and bloody. "Lieutenant Ferry? he's unhurt--and so is Mr. Gholson! Mr. Gholson's gone to Franklin for doctors; Lieutenant Ferry sent him; he's been sending everybody everywhere faster than anybody else could think of anything!" "You would have removed me," Lawrence asked. "Must attend the inquest, sir," said the practical Prout. "Still, if that was my house, I'd pull it down if I couldn't sell it." In considering pneumatic machinery there are the following points to which attention is directed:— Father Coppens and I beseeched the German commanding officer to spare the houses of some people, large families, who came for shelter to the father's convent. And at length, after long supplications, we secured exemption for a few houses, inhabited by people who could not have done anything in a village which had been completely evacuated by the population, at the beginning of the fight. "Yes, sir," he answered, "that will be difficult enough. Everybody has fled, even my own wife and children. I remained because I thought it was my duty, and now I have been tramping through the streets already for over twenty-four hours, without being relieved. It seems that by far the greater number of my colleagues fled also." Besides Zeno, Parmenides seems to have had only one disciple of note, Melissus, the Samian statesman and general; but under various modifications and combined with other elements, the Eleatic absolute entered as a permanent factor into Greek speculation. From it were lineally descended the Sphairos of Empedocles, the eternal atoms of Leucippus, the Nous of Anaxagoras, the Megaric Good, the supreme solar idea of Plato, the self-thinking thought of Aristotle, the imperturbable tranquillity attributed to their model sage by Stoics and Epicureans alike, the sovereign indifference of the Sceptics, and finally, the Neo-platonic One. Modern philosophers have sought for their supreme ideal in power, movement, activity, life, rather than in any stationary substance; yet even among them we find Herbart partially reviving the Eleatic theory, and confronting Hegel’s fluent categories with his own inflexible monads. “I believe you!” Larry spoke earnestly, reassuringly. “It’s a perfectly reasonable explanation.” "I have heard o' the place. Lived there long?" "All right," assented Si, who had as little taste as his partner for seeming to weaken. "Here goes for a fight or a foot-race." TO: Fredk. Ramsbotham "Yes, but d?an't m?ake him angry—he might beat you." That summer old Mrs. Backfield became completely bedridden. The gratefulness of sunshine to her old bones was counteracted by the clammy fogs that streamed up every night round the farm. It was an exceptionally wet and misty summer—a great deal of Reuben's wheat rotted in the ground, and he scarcely took any notice when Tilly announced one morning that grandmother was too ill to come downstairs. HoME sm电影系列番号ENTER NUMBET 004www.yeo5.com.cn
www.tir-wall.com.cn
www.cznhj.org.cn
mingsingedu.cn
fgyuedu.cn
www.tcmj2000.com.cn
www.bzyida08.com.cn
www.whgaoxiong.com.cn
fxtq.com.cn
xiangyi-sh.com.cn