Introducing the properties of goggle type board Plug valve, analyzing the characteristics of the valve, proposing the methods of improving sealing structure.

介绍了眼镜式插板阀的性能，分析了该阀门的密封特点，提出了改进密封结构的方法。

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Pneumatic valve and plug valve of a type is the same, only it's shut down parts of a sphere, the sphere rotates around the body center line to achieve the opening and closing a valve.

气动球阀和旋塞阀是同属一个类型的阀门，只有它的关闭件是个球体，球体绕阀体中心线作旋转来达到开启、关闭的一种阀门。

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A kind of slope slots and embeded plates hoisting expanding type valve sealing mechanism which is suitable for ball valves, butterfly valves and plug valves is introduced.

介绍了一种适用于球阀、蝶阀和旋塞阀的斜槽插板升降撑拢式阀门密封结构。

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