蝶阀

球阀

旋塞阀

控制阀

Ball valve

Plug valve

Butterfly Valve

Control valve

蝶阀又叫翻板阀，是一种结构简单的调节阀，可用于低压管道介质的开关控制的蝶阀是指关闭件（阀瓣或蝶板）为圆盘，围绕阀轴旋转来达到开启与关闭的一种阀。

阀门可用于控制空气、水、蒸汽、各种腐蚀性介质、泥浆、油品、液态金属和放射性介质等各种类型流体的流动。在管道上主要起切断和节流作用。蝶阀启闭件是一个圆盘形的蝶板，在阀体内绕其自身的轴线旋转，从而达到启闭或调节的目的。

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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.