久久综合九色综合国产_精品一区二区日韩_youjazz性欧美_中文字幕一区二区三A片_日韩大片在线永久观看视频网站免费_亚洲成人bt

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: 欧美三级三级三级爽爽爽_国产欧美亚洲日韩图片_欧美日韩免费视频_亚洲23p_欧美一区二区三区免费视频_91导航在线_久久久一区国产精品无码_国产91黄色 | 国产综合图_精品99免费_日日操夜夜操免费视频_国产精品激情欧美可乐视频_热99精品里视频精品_99国产精品久久久久久久..._国产无套抽出白浆来_高清成人免费视频 | 一级视频毛片_成人观看免费视频_97影院九七理论片在线一二_免费av一区二区三区_午夜A级成人免费毛片_一级高清免费毛片_狠狠五月激情六月丁香_久久99精品这里精品6 | 国产情侣酒店自拍_jojo的奇妙冒险星尘斗士埃及篇免费观看_孕交VIDEOSGRATIS孕妇性欧美_日韩影院一区二区_日韩视频中文字幕精品偷拍_91麻豆国产级在线_国产人久久人人人人爽_久久夜av | 99爱免费观看国语_青青草国产免费国产是公开_91超碰rencao97精品_国产明星xxxx精品hd_av观看网站_欧美mmm_自拍偷拍色综合_91干在线 | 小明成人永久免费视频在线观看_中文在线国产_一区二区三区AV高清免费波多_亚洲一级毛片在线_成人av毛片_亚洲伦理在线_野花社区观看在线www官网_国产亚洲AV无码专区A∨麻豆 | 东京热无码人妻一区二区av_久久久国产免费_色欧美片视频在线观看_极品少妇被猛得白浆直流草莓视频_最新永久免费AV无码网站_JIZZ国产丝袜18老师女人生产_亚洲色大18成人网站WWW在线播放_偷拍自拍第二页 | 蜜桃AV无码免费看永久_国产精品揄拍100视频_国产在线1_久久三级_九九热免费精品视频_国产午夜精品久久久_超碰97国产精品人人cao_成人免费高潮片视频软件 | 国产午夜精品理论片a大结局_69激情视频_欧美人与动性xxxxBBBB_久久人爽人人爽人人片AV_少妇人妻88久久中文字幕_日本国产精品视频_在线观看av播放_亚洲欧美另类在线图片区 | 中文字幕制服丝袜一区二区_午夜香港三级A三级三点_夜夜躁狠狠躁日日躁欧美_91九色丨porny最新地址_黄色片网站免费看_最新Av中文字幕无码专区_久久伊人一区_在线小视频你懂的 | 69ww免费视频播放_av区无码字幕中文色_国产精品农村妇女α片_浮生影视在线观看免费_日本欧美产无码久久久久又大又粗_成人免费视频网站在线看_99在线观看_国产精品成人一区二区三区夜夜夜 | 亚洲国产熟妇无码日韩_国产亚洲欧美日韩国产片_女人天天干夜夜爽视频_日韩在线观看视频一区二区三区_中国XVIDEOS厕所偷窥_狠狠色狠狠色综合日日不卡_在线观看免费亚洲_国产又色又爽又黄的网站在线 | www.夜夜操_91亚洲精品中文字幕_亚洲精品一区二区三区三区_极品福利在线_国产网址_日韩美国国产一级毛片_91午夜精品亚洲一区二区三区_日本高清黄色网站 | 久久精品青青大伊人av_在线日本看片免费人成视久网_日本色呦呦_一级黄色视频久久网_久久资源免费视频_久久狼人综合_午夜影院在线免费_出差被绝伦上司侵犯中文字幕 | 国产精品自在拍视频首页_中文字幕乱码亚洲无线码按摩_成人激情视频在线观看_www.四虎com_国产在线视频99_2002亚洲精品真实在线_国产精选在线播放_色先锋影音岛国av资源 | 男女18禁啪啪无遮挡激烈网站_黄色毛片免费进入_学园默示录免费观看_辽宁人妻Chinese_在线婷婷_黄的网站在线观看_欧美特级黄色大片_日本在线视频免费 | 国产乱来乱子视频_国产精品推荐_国产一区二区啪啪_欧美日韩一区二区三区自拍_看av在线_av国产片_国产亚洲久_91成年人 | 欧美另类高清ZO欧美_老太BBwwBBww高潮_最新91视频_午夜精品久久久久久久久久久久久久_欧美一区二区视频高清专区_午夜无码A级毛片免费视频_全国最大的成人网_亚洲综合日韩精品欧美国产 | 欧美午夜精品久久久久免费视_中国性孕妇孕交tv_日韩人妻无码精品久久免费一_欧美深夜福利_伊人网五月天_办公室挺进少妇双腿间小说_日本久久久一区二区三区_韩国三级l中文字幕无码 | www.久_国产成人在线网址_小视频在线看_91视频免费看片_欧美裸体XXXX极品少妇_免费国产精品视频_草逼网页_99热中文 | 老赵揉着粉嫩的双乳小说_在线观看无码AV免费不卡软件_日日爽视频_久久蜜臀_免费大黄网站在线观_久热精品在线中文字幕播放_欧美一级理论性理论a_色婷婷综合久久久久中文一区二区 | 一区二区中文字幕_狠狠色丁香婷婷_国产成人AV片免费_中文字幕日韩精品在线观看_精品人妻无码一区二区三区视频_免费的黄色一级片_中文字幕二区三区_亚洲欧美国内爽妇网 | 精品99久久_日本人妻人人人澡人人爽_黄色片免费看_黄绝一级毛片_国产精品性色一区二区三区_天天做爰天天爽_性暴力欧美猛交在线播放_久久精品国产亚洲77788 | 四虎影视8848h_日本一卡2卡三卡4卡无卡免费网站_亚洲欧美精品_超清精品丝袜国产自在线拍_精品国产福利在线_xxx国产在线_二区top_麻豆91av | 德国妓女精品性HD_狼人精品一区二区三区在线_性猛交xxxx乱大交中国_国产一级片中文字幕_四虎永久在线精品免费播放_日日婷婷夜日日天干A片_91成熟丰满女人少妇777_好好热av | 福利在线看_日本在线天堂_热久久国产_日韩不卡在线观看日韩不卡视频_国产日产欧产精品精品蜜芽_韩国一级片免费_亚洲欧美日韩综合在线_免费不卡视频 | 乱子伦xxxx_国产精品第一_色多多A级毛片免费看_二级黄的全免费视频_国产片网站_日韩中文字幕高清_91在线精品视频观看_色综合久久天天综合绕观看 | 成年人黄色一级片_99精品国产在热久久_蜜桃在线播放_国产台湾无码av片在线观看_日本aaa大片_国产成人久久AV一区二区_国产成人精品一区二区视频免费_国产69精品久久久久99尤 | 亚洲人成色4444在线观看_美女视频黄又黄又免费高清_西游性淫片a级在线观看_欧美成a人片在线观看久_特级黄色毛片视频片子_青草久久久国产线免观_国产精品999在线观看_色欧美色美色一区二区在线 | 亚洲在线高清_亚洲精品成人在线_黄色一级免费观看_天天澡天天揉揉av在线_欧美国产一区二区在线_国内精品久久久久影院网站_国产成人精品无缓存在线播放_91啦91丨porny丨论坛 | 午夜久久成人_chinesemature老熟妇_亚洲精品中字_狠狠色噜噜狠狠狠7777奇米_黑人特级欧美aaaaaa片_777国产偷窥盗摄精品视频_成年人免费观看的视频_色婷婷久久99综合精品jk白丝 | 成人亚洲a片v一区二区三区_亚洲日本精品国产第一区_噜噜噜私人影院_www.超碰在线观看_亚洲精品久久激情国产片_国产欧美日韩在线视频_精品亚洲一区二区三区在线播放_亚洲国产成人精品无码区 | av黄色在线观看_国产一级片一区二区_一本大道香蕉久中文在线播放_开心色播五月_国内揄拍国内精品少妇_久草久热_久久996热在线播放_我的公把我弄高潮了视频 | 日本一区二区不卡高清更新_啦啦啦在线观看免费版中文_国产专区精品_亚洲熟女乱色综合亚洲小说_免费看午夜无码福利专区_国产区视频一区_大黑人交xxxx18视频_四lll少妇bbbb搡bbbb | 日韩118页_日韩在线无毛_成人网av_国产青青_国产精品系列无码专区_男人午夜视频在线观看_国产精一区二区三区_亚洲AV无码久久精品蜜桃 | 佐野ゆいな在线播放_人人看97_成年人在线播放_国产一区二区三区不卡av_精品人妻无码一区二区三区在线_2022精品久久久久久中文字幕_国产亚洲一卡2卡3卡4卡老狼_毛片24种姿势无遮无拦 | 91爱国产_丰满少妇被猛烈进入高清播放软件_国产一区二区三区_久久亚洲国产_91香蕉亚洲精品_亚洲夜夜欢a∨一区二区三区_www.日本国产_亚洲一区二区中文播放av | 国产日韩在线一区_色婷婷激情一区二区三区_狠狠做五月深爱婷婷伊人_成人二区_国产又黄又大又粗视频_亚洲性免费视频_日韩三级精品_91经典在线 | 亚洲午夜视频_久久78_麻豆国产原创视频在线播放_成人在线视频免费播放_远方的山楂树免费观看视频48集_亚洲另类春色国产精品_国产影院一区二区三区_无套内射AV五十区 | 中文字幕久久熟女人妻av免费_h漫在线观看_www.天天干.com_99热最新网址_国产AV无码专区亚洲AV麻豆_99成人精品视频_成熟女人色惰片免费视频_久久亚洲综合色一区二区三区 | 国产一区免费播放_亚洲精品天堂久久久老牛_女人被做到高潮视频_国产超碰久久av青草_丁香色狠狠色综合久久_日本高清网色_手机在线看黄色片_欧美精品色一区二区三区 |