原文：
阀门是一种管路附件。它是用来改变通路断面和介质流动方向，控制输送介质流动的一种装置。具体来讲，阀门有以下几种用途： (1)接通或截断管路中的介质。如闸阀、截止阀、球阀、旋塞阀、隔膜阀、蝶阀等。 (2)调节、控制管路中介质的流量和压力。如节流阀、调节阀、减压阀、安全阀等。 (3)改变管路中介质流动的方向。如分配阀、三通旋塞、三通或四通球阀等。 (4)阻止管路中的介质倒流。如各种不同结构的止回阀、底阀等。 (5)分离介质。如各种不同结构的蒸汽疏水阀、空气疏水阀等。 (6)指示和调节液面高度。如液面指示器、液面调节器等。 (7)其他特殊用途。如温度调节阀、过流保护紧急切断阀等。 在上述的各种通用阀门中，用于接通和截断管路中介质流动的阀门，其使用数量约占全部阀门总数的80％。

“ Use a variety of valves ”是由提供的国际阀门新闻，译文仅供参考。另外，中国旋塞阀网还提供相关产品搜索： 、 、 、 、 、等。

译文：
Valve is a pipe attachment. It is used to change the channel section and flow direction of medium to control the flow of a device transmission medium. Specifically, the valve has the following purposes: (1) connect or disconnect the line of media. Such as gate valve, globe valve, ball valves, plug valves, diaphragm valves, butterfly valves and so on. (2) regulating, controlling the flow pipe and pressure in the medium. Such as throttle, regulating valve, reducing valve, safety valve and so on. (3) pipeline in the medium to change the direction of flow. Such as the distribution of valves, three cocks, three, or four-way ball valve and so on. (4) to prevent the line of medium back. A variety of different structures such as check valve, bottom valve. (5) separation medium. A variety of different structures, such as steam traps, air traps and so on. (6) direct and regulate fluid levels. Such as liquid level indicators, liquid level regulator, etc.. (7) other special purposes. Such as temperature control valve, over-current protection such as emergency shut-off valve. In the above-mentioned valves in a variety of common, used to connect and disconnect the line media flow valve, the use of all the valves of the total number of about 80%.