精品少妇无码av无码专区_亚洲深喉一区二区在线看片_亚洲A级毛片中文字幕免费观看_亚洲精品无码午夜福利字幕日韩精品_精品国产a∨无码一区二区三区

EN
CN

Butterfly Valve

Butterfly valves, also known as flap valves, are regulating valves with a simple structure. They can be used for switching control of low-pressure pipeline media The closing parts (discs) are discs that rotate to open and close the valve.

Valves can be used to control the flow of various types of fluids such as air, water, steam, corrosive media, mud, oil, liquid metals and radioactive media. They are mainly used to cut off and throttle flow in pipelines.