阀杆、塔型盖、格兰通过填料压紧密封，阀杆与执行机构通过固定于支架上的推力螺母实现上下运动。

A valve body is connected with a tower cover through soft seal, and pressed by a bracket through a bolt. The valve rod, the tower cover and a gland are pressed and sealed by filler.

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该艉轴填料密封装置能自动压紧密封填料，及时可靠地消除填料磨损间隙，具有稳定密封装置密封性能的优点。

The packing seal device of the screw shaft can automatically press the sealing packing, reliably eliminate wearing clearances of the packing in time and has the advantage of stable sealability.

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