Packing : packing contains corrosion inhibitor to avoid stem pitting . stuffing box is deep , assuring long packing life 填料：填料内含防腐剂，避免锈蚀阀杆。深度填料函确保较长的填料使用寿命。
Gland eye bolts : eye bolts are securely fastened to the bonnet yet swing away to permit easy access to the stuffing box 压盖有眼螺栓：有眼螺栓能够安全地紧固阀盖，也可以旋转拆卸，便于方便容易地进入填料函。
Large stuffing box accommodates all packing arrangements , including live - loaded design and lantern ring type for severe services 大型填料函可适应所有填料配置排列，包括适用于严酷应用环境的动负载结构和套环。
Base on failure analysis and stress distribution analysis of the stuffing box using the lame formula and software ansys in predigested model , it is found that the composition of the material accorded with the requirement for stuffing box , and the microstructure with few impurity was qualified 摘要对产生裂纹的填料盘进行了失效分析，通过拉梅公式和有限元分析软件对填料盘简化模型进行了受力分析。
To ensure the charging pump working reliably , the following measures should be adopted : ( 1 ) adopting modified circular casing to reduce the radial force of the impeller and decrease the seal clearance ; ( 2 ) using radical ribs on impeller and helical sealing on shaft to realize minor pressure differential ; ( 3 ) using back pressure stuffing box to ensure sealing under small packing force ; ( 4 ) adopting self - lubricant flexible graphite stuffing for absorption of solids entering in the graphite in case of leaking 为确保灌注泵可靠工作，提出改进措施： ( 1 )采用改型环形泵体降低叶轮的径向力，减小轴封间隙，抑制泄漏； ( 2 )采用背叶片降低叶片根部压头，获得微压，使轴封两端承受较小压差； ( 3 )采用螺旋密封降低轴封两端压差，在保持微压的同时避免出现负压，密封效果更好； ( 4 )采用反压式填料密封结构，在很小的压紧力下，即可保证密封； ( 5 )采用具有润滑功效的柔性石墨填料，即使发生轴封泄漏，进入石墨内部的固相颗粒也将随着石墨的消耗而被钻井液吸收。
