填料密封腐蚀磨损是填料密封装置失效的主要原因。
Corrosion wear is the major reason of the packing seal destruction.
杆和填料密封装置同样采用不锈钢，具有耐腐蚀性能。
The valve axis adopt stainless steel, it has good abradability and anti-causticity.
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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