According to needs and delivery medium, can be used two kinds of mechanical seals and packing seal, and the structure of these two kinds of interchangeability.

根据需要和输送介质，可采用机械密封和填料密封两种，且这两种结构具有互换性。

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Packing is an indispensable part as well as a major medium for promotion of the image of an enterprise.

包装是企业形象中不可缺少的一个重要组成部分，是体现传播企业形象的一个重要媒介物。

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V type packing structure has been employed to effectively transform the pushing force of the gland flange and the medium pressure into the sealing force against the stem.

阀杆采用V型填料密封结构，V型填料能将填料压盖的压紧力及介质力有效地转化成阀杆的密封力。

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