The design calculation of the large O ring rubber self energized seal (without bolt and nut )used for the vacuum equipment and its application results are introduced.

介绍真空设备法兰采用大直径O形环橡胶自紧式密封（不用螺栓和螺母）的设计计算及其应用效果。

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Our leading products are: IVAK brand rotation axis with seal, O-ring, supporting the production of automobile and motorcycle shock absorber rubber parts.

本厂主导产品为：IVAK品牌旋转轴用骨架油封、O型圈，配套生产汽车、摩托车减震器用橡胶件。

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According to the research the main question is that the high temperature of the welding make rubber seal O-ring spoiled, the insulating joint become waste product.

经调查，大管径绝缘接头的缺陷主要表现在焊接高温对橡胶密封材料的损伤方面，这会使刚已经生产完成的绝缘接头变成废品，浪费资源。

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