阀杆密封填料可采用唇形结构，密封可靠、操作力矩小。
Valve rod seal packing can adopt lip shape structure, seal up dependable, Operates moment of force small.
而压力侧以相同的力削弱了密封，这样使阀盖腔室和阀杆填料几乎总是承受最大管道压力。
The same force tends to reduce the seal on the pressure side with the result that bonnet cavity and the valve stem packing are nearly always subjected to maximum pipeline pressure.
阀杆和填料密封装置同样采用不锈钢，具有耐腐蚀性能。
The stem and packing gland are also stainless steel for corrosion protection.
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