国产熟妇婬乱A片免费看牛牛,又粗又硬又爽18级A片,一级婬片A片AAA毛片裸体书屋,少妇搡BBBB搡BBB搡野外

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.

黄色视频网站免费看 | 黑人 亚洲人 娇小 | 北京熟妇搡BBBB搡BBBB | 国产精品久久久久久久不卡 | 亚洲无码视频免费在线观看 | 精品人伦一区二区三区蜜桃免费 | 东北嫖老熟女一区二区视频网站 | 婷婷五月天综合网 | 黑人巨大精品A片一区二区七区 | 亚洲精品乱码久久久久久按摩观 | 亚洲高清无码一区 | 三级片网站在线观看 | 100部A级毛片免费看 | 精品香蕉一区二区三区 | 国产又大又黄视频 | 中文字幕一区二区三区四区50岁 | 搡BBBB搡BBB搡视频一级看 | 无码精品毛片免费视频 | www.国产免费 | 18 精品 爽 国产白嫩 | 亲子乱婬一级A片 | www.日韩无码.com | 欧美国产一区二区三区 | 无码内射在线观看 | 91在线无码精品秘 国产血腥 | 日本一级婬片A片免费播放妖精 | 久久久久久91香蕉国产 | 日韩高清无码一区 | 国产激情婬妇A片视频天美 国产睡熟迷奷系列精品视频 | 国产精品久久午夜夜伦鲁鲁 | 国精产品一二三区精华液 | 国产暴力暴力强伦轩第三部视频 | 成人欧美一区二区三区在线播放 | 国产精品久久久午夜夜伦鲁鲁 | 91人妻人人澡人人爽人人玩 | 特级西西444www高清大胆免费看 | 国产精品无码在线播放 | 国产一级a毛一级a毛免费观看 | 深圳妇女搡BBBB搡BBBB | 啊啊啊好大流水了国产精品无码 | 亚洲精品国产麻豆 |