wedge gate valve

The analysis and control of prism-angle error on seating faces of wedge gate valve;

楔式闸阀密封面棱角误差的分析及其控制

Replaceable packing with pressure inside screw nonrising stem type wedge gate valve;

暗杆楔式闸阀阀杆密封结构改进

Seal Structure of a New Type Wedge Gate Valve's Tow Pices;

新型楔式闸阀双闸板密封结构