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.

无码人妻一区二区三区线花季软件 | 艳妇乳肉豪妇荡乳AV无码福利 | 99久久精品无码一区二区麻豆 | 污污内射久久一区二区欧美日韩 | 欧美成人午夜无码A片秀色直播 | 国产熟妇毛片A片AAAAPp | 少妇搡BBBB搡BBB搡打电话 | 中文高清无码在线观看 | 精品国产鲁一鲁一区二区真希友田 | 一级 a一级 a 免费观看免免黄‘/ | 99久久久国产精品免费最新章节 | 精品国产一区二区三区久久久 | 免费观看www成人A片麻豆 | 水蜜桃视频在线观看 | 欧美日韩国产在线 | 无码人妻一区二区三区精品不付款 | 国产无遮挡A片又黄又爽小直播 | 香蕉一级婬片A片久久精 | 国产精品秘 久久久久久 | 亚洲一区二区三区在线 | 乱色精品无码一区二区国产盗 | 中文无码一区二区三区 | 午夜福利免费视频 | 国产中文字幕在线观看 | 波多野结衣乳巨码无在线观看迅雷下载 | 黄色网战在线观看 | 国产乱婬片A片AAAAPp地址 | 韩国青草最新无码自慰GIF | 国产美女裸体无遮挡免费视频网站 | 国产亲子乱婬一级A片 | 国产 高清秘 成人久久 | 无码精品一区二区三区四区爱奇艺 | 亚洲AV乱码一区二区三区老胖妞 | 日产国产亚洲A片无 码 | 一级全黄少妇性色生活片 | 新婚夜少妇被躁BD免费视频 | 欧美一级婬片A片AAA毛片闺蜜 | 国产成人无码综合亚洲日韩 | 又黄又爽一级A片野外 | 无码精品人妻一区二区三区芙青椒 | 久久久无码国产精品无码三区三区 |