一区二区三区不卡av_91亚洲精品在线观看_北条麻妃中文_大地资源网高清在线观看动漫_91精品国产一区自在线拍_日韩一区二区三区久久

Hello, welcome to the Jiangsu Ideal Valve Co., Ltd. official website!
TEL:+86-515-87214888      EMAIL:fnjslxfy@163.com      

Material comparison of several commonly used rubber sealing rings for valves

Time:2020-05-29
What are the sealing rings made of? What are the characteristics?

Seal ring refers to the ring cover composed of one or several parts, which is fixed on one ring or washer of the bearing and contacts with another ring or washer or forms a narrow labyrinth gap to prevent the leakage of lubricating oil and the invasion of foreign matters. Because its section is O- shaped, it is called O-shaped seal ring. What are the sealing rings made of? What are the characteristics?


1、 NBR nitrile rubber sealing ring

It is suitable for use in petroleum hydraulic oil, glycol hydraulic oil, diester lubricating oil, gasoline, water, silicon grease, silicon oil and other media. It is the most widely used and lowest cost rubber seal at present. Not suitable for polar solvents such as ketones, ozone, nitrohydrocarbons, MEK and chloroform. Generally, the temperature range is - 40 ~ 120 ℃.


2、 HNBR hydrogenated NBR sealing ring

It has excellent corrosion resistance, tear resistance, compression deformation resistance, ozone resistance, sunlight resistance and weather resistance. It has better wear resistance than NBR. It is suitable for washing machine and automobile engine system. It is not recommended to use in alcohol, ester or aromatic solution. Generally, the temperature range is - 40 ~ 150 ℃.


3、SIL sealing ring

It has excellent heat resistance, cold resistance, ozone resistance and atmospheric aging resistance. It has good insulation performance. However, the tensile strength of rubber is worse than that of general rubber and does not have oil resistance. It is suitable for household appliances such as electric water heater, electric iron, microwave oven, etc. It is also suitable for all kinds of articles in contact with human body, such as water bottles, drinking fountains, etc. It is not recommended to be used in most concentrated solvents, oil products, concentrated acids and sodium hydroxide. Generally, the temperature range is - 55 ~ 250 ℃.


4、 Viton fluororubber sealing ring

High temperature resistance is better than silicone rubber, with excellent weather resistance, ozone resistance and chemical resistance, and poor cold resistance. It is resistant to most oils and solvents, especially acids, aliphatic hydrocarbons, aromatic hydrocarbons, animal and vegetable oils. It is suitable for sealing requirements of diesel engine, fuel system and chemical plant. It is not recommended to use in ketones, low molecular weight esters and mixtures containing nitrate. Generally, the temperature range is - 20 ~ 250 ℃.


5、 FLS fluorosilicone rubber sealing ring

Its performance has the advantages of both fluororubber and silicone rubber. It has good oil resistance, solvent resistance, fuel oil resistance and high and low temperature resistance. It can resist the attack of oxygenated compounds, aromatic solvents and chlorinated solvents. Generally, the temperature range is - 50 ~ 200 ℃.


6、 EPDM EPDM EPDM sealing ring

It has good weather resistance, ozone resistance, water resistance and chemical resistance. It can be used for alcohols and ketones, and also for sealing in high temperature steam environment. Generally, the temperature range is - 55 ~ 150 ℃.


7、 CR neoprene sealing ring

It has excellent sunlight and weather resistance. It is not afraid of refrigerants such as dichlorodifluoromethane and ammonia. It is resistant to dilute acid and silicone grease lubricating oil, but it has a large expansion in mineral oil with low aniline point. It is easy to crystallize and harden at low temperature. It is suitable for all kinds of environments contacting with atmosphere, sunlight and ozone, as well as all kinds of fire-resistant and chemical corrosion-resistant sealing links. It is not recommended to use in strong acid, nitrohydrocarbon, ester, chloroform and ketone chemicals. Generally, the temperature range is - 55 ~ 120 ℃.


8、 IIR butyl rubber sealing ring

It has good air tightness, heat resistance, sunlight resistance, ozone resistance and insulation performance; it has good resistance to polar solvents such as alcohol, ketone, ester, etc., and can be exposed to animal and vegetable oil or oxide. Suitable for chemical resistant or vacuum equipment. It is not recommended to use with petroleum solvents, kerosene or aromatics. Generally, the temperature range is - 50 ~ 110 ℃.


9、 ACM acrylic rubber sealing ring

It has excellent resistance to oil products, high temperature and weather resistance, but mechanical strength, compression deformation rate and water resistance are slightly poor. Generally used in automobile transmission system and power steering system. Not suitable for hot water, brake oil, phosphate. Generally, the temperature range is - 25 ~ 170 ℃.


10、 NR natural rubber sealing ring

Rubber products have good wear resistance, elasticity, breaking strength and elongation. However, it is easy to age in the air and become sticky in case of heat. It is easy to expand and dissolve in mineral oil or gasoline. It is alkali resistant but not acid resistant. It is suitable for use in automobile brake oil, ethanol and other liquid with hydrogen peroxide ion. Generally, the temperature range is - 20 ~ 100 ℃.


11、 PU polyurethane rubber sealing ring

Polyurethane rubber has very good mechanical properties, and its wear resistance and high pressure resistance are far superior to other rubbers. It has good aging resistance, ozone resistance and oil resistance, but it is easy to hydrolyze at high temperature. Generally used for high pressure, wear- resistant sealing link. Generally, the temperature range is - 45 ~ 90 ℃.



主站蜘蛛池模板: 永久天堂网AV手机版 | 国产麻豆一区二区三区 | 超频97人妻在线视频 | av成人免费观看 | 色戒网址 | 欧美亚洲日韩不卡在线在线观看 | 欧美日韩中文字幕在线视频 | 一级黄色录像影片夫妻性生活影片 | 艳妇乳肉豪妇荡乳后续丁字裤视频 | 一级黄色片网址 | 国产精品亚洲一区二区z | 国产丝袜91久久久久久久久久久 | eeuss影院www在线观看 | 久久久一级毛片 | 新版中文在线官网 | 国产一级片一区二区 | 一区二区三区三州在线观看视频 | 久久精品国产网站高清综合 | 99蜜久久精品国产首页 | 日韩精品视频一区二区三区 | 看全色黄大色黄大片大学生 | 国产精品视频一二三区 | 黄色录像一级片播放 | 久热这里只精品国产8 | 国产精品国产三级国产AV主播 | 久久免费国产视频 | 国产女人本色高清在线观看 | 国产欧洲在线 | 亚洲一区二区三区中文字幕 | 日韩视频―中文字幕 | 日韩精品国产精品 | 亚洲日本中文字幕 | 中文字幕3区| 一级小视频| 国产超污精品A级毛片 | 性少妇vid| 69堂国产在线视频 | av在线不卡免费看 | 性精品 | 91亚色视频在线观看 | 法国《性迷宫》在线播放k8 |