译文：
按用途和作用分类 截断阀类主要用于截断或接通介质流。包括闸阀、截止阀、隔膜阀、球阀、旋塞阀、碟阀、柱塞阀、球塞阀、针型仪表阀等。 调节阀类主要用于调节介质的流量、压力等。包括调节阀、节流阀、减压阀等。 止回阀类用于阻止介质倒流。包括各种结构的止回阀。 分流阀类用于分离、分配或混合介质。包括各种结构的分配阀和疏水阀等。 安全阀类用于介质超压时的安全保护。包括各种类型的安全阀。 按主要参数分类 （一）按压力分类 真空阀工作压力低于标准大气压的阀门。 低压阀公称压力PN小于1.6MPa的阀门。 中压阀公称压力PN2.5~6.4MPa的阀门。 高压阀公称压力PN10.0~80.0MPa的阀门。 超高压阀公称压力PN大于100MPa的阀门。 （二）按介质温度分类 高温阀t大于450C的阀门。 中温阀120C小于t小于450C的阀门。 常温阀-40C小于t小于120C的阀门。 低温阀-100C小于t小于-40C的阀门。 超低温阀t小于-100C的阀门。 （三）按阀体材料分类 非金属材料阀门：如陶瓷阀门、玻璃钢阀门、塑料阀门。 金属材料阀门：如铜合金阀门、铝合金阀门、铅合金阀门、钛合金阀门、蒙乃尔合金阀门 铸铁阀门、碳钢阀门、铸钢阀门、低合金钢阀门、高合金钢阀门。 金属阀体衬里阀门：如衬铅阀门、衬塑料阀门、衬搪瓷阀门。 通用分类法 这种分类方法既按原理、作用又按结构划分，是目前国际、国内最常用的分类方法。一般分闸阀、截止阀、节流阀、仪表阀、柱塞阀、隔膜阀、旋塞阀、球阀、蝶阀、止回阀、减压阀安全阀、疏水阀、调节阀、底阀、过滤器、排污阀等。

“ Occasions and the advantages and disadvantages of the application of the valve ”是由提供的国际阀门新闻，译文仅供参考。另外，中国气动阀门网还提供相关产品搜索：、、、、等。

原文：
Classified according to purpose and role of Cut off valve is mainly used for cut off or switched media stream. Including the gate valve, globe valve, diaphragm valves, ball valves, plug valves, butterfly valve, plunger valve, ball plug valve, needle-type meter valve. Regulating valves primarily for regulating the media flow and pressure. Including regulating valve, throttle, valve and so on. Check class is used to prevent the media back. Including the structure of valve. Shunt valve used to separate, distribution or mixed media. Including the distribution of various structures such as valves and traps. Over-pressure safety valve when the class is used to medium security. Including various types of safety valve. Classification by main parameters (A) of the pressure classification Vacuum valve working pressure less than the standard atmospheric pressure valve. Low-pressure valve Nominal pressure PN is less than 1.6MPa valve. Medium-pressure valve nominal pressure PN2.5 ~ 6.4MPa valve. High-pressure valve nominal pressure PN10.0 ~ 80.0MPa valve. Ultra-high pressure valve Nominal pressure PN is greater than 100MPa valve. (B) The medium temperature classification T is greater than 450C high-temperature valve valve. Medium temperature valve 120C is less than t less than the 450C of the valve. Valve-40C ambient temperature is less than t less than the 120C of the valve. Low-temperature valve-100C is less than t less than-40C of the valve. Ultra-low temperature valve t is less than-100C valve. (C) Classification according to Body Material Non-metallic materials valves: valve, such as ceramics, glass, steel valves, plastic valves. Metal valves: such as copper alloy valves, aluminum valves, lead alloy valves, titanium valves, Monel valves Cast iron valves, carbon steel valves, cast steel valves, low-alloy steel valves, high alloy steel valves. Metal Valve Lining Valve: If the lead-lined valves, plastic lined valves, valves lining enamel. General Classification This classification method is not only according to principles, the role of another division according to the structure, is the international, the most commonly used classification method. The general sub-gate valve, globe valve, throttle, instrument valves, plunger valves, diaphragm valves, plug valves, ball valve, butterfly valve, check valve, pressure reducing valve safety valves, steam traps, regulating valves, bottom valves, filters, sewage valve.