国产亲子伦一级A片,欧美激情在线精品一区二区三区,国产亚洲精品久久久久久郑州,专干老妇熟女6070频

News center

The current position | home page > News and information > Common problems

How to choose gasket

Since there are many types of gaskets and we can recommend the corresponding gasket models for different parts of different industrial and mining occasions, such as automobile gaskets (please inform the cylinder gasket?Transmission pad?Water pump pad?Vent gasket?Such as OEM matching or after-sale maintenance market repair use, please try to provide a variety of parameters in order to choose the quality and affordable products you need.

Selection of the gasket
Any type of gasket must have the following eight important characteristics to ensure effective sealing for a long time in harsh service environment:

Air tightness 
For the media of the sealing system, the gasket does not leak at the recommended temperature and pressure for a certain period of time.

compressibility 
The gasket and flange contact surface should be well matched after the connection bolts are tightened to ensure the sealing.

Creep resistance 
Under the influence of pressure load and service temperature, the creep resistance of the gasket should be better, otherwise, the bolt torque loss will be caused, resulting in the decrease of the surface stress of the gasket, and the leakage of the hard gas system.

Chemical resistance 
The chosen gasket should not be subject to chemical medium corrosion, and can not be polluted by the medium.

resilience 
Even under the stable condition of the system, the two connected flanges will certainly have a small displacement due to the influence of temperature and pressure, the elastic function of the gasket should be able to make up for this displacement to ensure the sealing of the system.

The uf resistance 
The gasket shall be easily removed from the flange after use and shall not be glued

No corrosive 
The gasket shall be non-corrosive to the surface of the connecting flange.

Resistance to temperature 

The selected gaskets shall be used normally at the lowest and highest temperatures of the system.

刘涛AV婬乱一级A片 亚洲精品国产精品乱码 | 果冻传媒婬片AAAA片小说直播 | 91精品人妻无码 | 国产黄色视频网站 | 专干老熟女300部合集 | 成人3D动漫一区二区三下载 | 好吊妞这里只有精品 | 农村寡妇高潮一级毛片 | 国产成人免费观看 | 亚洲综合激情五月久久 | 女性自慰A片免费播放 | 99精品国产一区二区 | 99人妻碰碰碰久久久久禁片 | 欧美午夜福利视频 | 午夜成人免费电影 | 真实乱子伦免费视频 | 91丨人妻丨国产丨蚪窝 | 蜜桃在线码无精品秘 入口九色 | 麻豆91精品91久久久停运原因 | 揄拍成人国产精品视频 | 中文无码一区二区三区 | 一区二区三区久久久 | 国产精品久久欧美久久一区 | 成人无码区免费A片久久鸭软件 | 国产精品国产三级国产专区53 | 狠狠色噜噜色狠狠狠综合久久成人 | 亚洲蜜臀AV乱码久久精品蜜桃 | 无套内谢少妇毛片A片流出白浆 | 国产美女精品一区二区三区 | 摸BBB揉BBB揉BBB视频 | 精品人妻少妇嫩草一区二区无码 | 日本A片无码少妇下载免费看直播 | 人妻–ThePorn已婚少妇 | 2018年的中文在线看 | 无码人妻一区二区三区精品不付款 | 日韩国产欧美在线观看 | 17.c蜜桃视频红桃视频 | 亚洲蜜桃精久久久久久久久久久久 | 天堂VA蜜桃一区二区三区漫画版 | 亚洲视频中文字幕 | 福利视频1000 |