这种设计结构不依赖密封填料来定位闸板，因此使得密封填料的更换更加简单。
The design doesn't rely on the packing to position the gate, making packing replacement easier.
从填料密封结构的优化、填料的优选对本厂聚丙烯聚合釜轴封技术进行了深入的研究。
By means of optimizing seal construction and packing material, the shaft seal technique of polypropylene polymerizer in this plant are deeply researched.
摘要针对闸阀阀杆填料密封泄漏的问题，提出了正确选择密封填料的材料和改进闸阀填料压盖密封件结构的技术改进措施。
In allusion to the leaking of packing of gate valve, this paper presents technical improvement measures in properly selecting packing material and varying the structure of packing assembly.
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