阀门的分类

　　Classification of valves

　　按动力分

　　Divided by power

　　自动阀：依靠介质自身力量进行动作的阀门。如止回阀、减压阀、疏水阀、安全阀等。

　　Automatic valve: a valve that operates based on the force of the medium itself. Such as check valves, pressure reducing valves, drain valves, safety valves, etc.

　　驱动阀：依靠人力、电力、液力、气力等外力进行操纵的阀门。如截止阀、节流阀、闸阀、碟阀、球阀、旋塞阀等。

　　Drive valve: a valve that relies on external forces such as human, electric, hydraulic, and pneumatic to operate. Such as globe valves, throttle valves, gate valves, disc valves, ball valves, plug valves, etc.

　　按结构特性分

　　Classified by structural characteristics

　　按用途分

　　Classified by purpose

　　开断阀：切断或接通管路介质。如截至阀、闸阀、球阀、旋塞阀等；

　　Cut off valve: Cut off or connect the medium in the pipeline. Such as globe valves, gate valves, ball valves, plug valves, etc;

　　调节阀：调节介质的压力或流量。如减压阀、调节阀；

　　Regulating valve: regulating the pressure or flow rate of the medium. Such as pressure reducing valves and regulating valves;

　　止回阀：防止介质倒流。如止回阀。

　　Check valve: prevents medium backflow. Like a check valve.

　　分配阀：改变介质的流向，起分配作用。如三通旋塞、三通截止阀等。

　　Distribution valve: changes the flow direction of the medium and plays a distribution role. Such as three-way plug valves, three-way globe valves, etc.

　　安全阀：压力超限定数值时，排放多余的介质，保证设备安全。如安全阀、事故阀；

　　Safety valve: When the pressure exceeds the limit value, excess medium is discharged to ensure equipment safety. Such as safety valves and accident valves;

　　阻气排水阀：留存气体、排除凝结水，如疏水阀。

　　Gas blocking drain valve: retains gas and eliminates condensed water, such as a drain valve.

　　开断阀：切断或接通管路介质。如截至阀、闸阀、球阀、旋塞阀等；

　　Cut off valve: Cut off or connect the medium in the pipeline. Such as globe valves, gate valves, ball valves, plug valves, etc;

　　调节阀：调节介质的压力或流量。如减压阀、调节阀；

　　Regulating valve: regulating the pressure or flow rate of the medium. Such as pressure reducing valves and regulating valves;

　　止回阀：防止介质倒流。如止回阀。

　　Check valve: prevents medium backflow. Like a check valve.

　　分配阀：改变介质的流向，起分配作用。如三通旋塞、三通截止阀等。

　　Distribution valve: changes the flow direction of the medium and plays a distribution role. Such as three-way plug valves, three-way globe valves, etc.

　　安全阀：压力超限定数值时，排放多余的介质，保证设备安全。如安全阀、事故阀；

　　Safety valve: When the pressure exceeds the limit value, excess medium is discharged to ensure equipment safety. Such as safety valves and accident valves;

　　阻气排水阀：留存气体、排除凝结水，如疏水阀。

　　Gas blocking drain valve: retains gas and eliminates condensed water, such as a drain valve.

　　按操纵方法分

　　Classified by manipulation method

　　手动阀门:借助手轮、手柄、杠杆、链轮、齿轮、蜗轮等，由人力来操纵的阀门。

　　Manual valve: a valve that is manually operated using a handwheel, handle, lever, sprocket, gear, worm gear, etc.

　　电动阀门:借助电力来操纵的阀门。

　　Electric valve: a valve operated by electricity.

　　气动阀门:借助压缩空气来操纵的阀门。

　　Pneumatic valve: a valve operated by compressed air.

　　液动阀门:借助水、油等液体，传递外力来操纵的阀门。

　　Hydraulic valve: a valve operated by transmitting external force through liquids such as water and oil.

　　按压力分

　　Divided by pressure

　　真空：绝对压力小于1公斤/厘米2的阀门。

　　Vacuum: Valve with an absolute pressure less than 1 kg/cm2.

　　低压：公称压力小于16公斤/厘米2的阀门。

　　Low pressure: valves with a nominal pressure less than 16 kg/cm2.

　　中压：公称压力25－64公斤/厘米2的阀门。

　　Medium pressure: valves with a nominal pressure of 25-64 kg/cm2.

　　高压：公称压力100－800公斤/厘米2的阀门。

　　High pressure: valves with a nominal pressure of 100-800 kg/cm2.

　　超高：公称压力达到或大于1000公斤/厘米2的阀门。

　　Ultra high: Valves with a nominal pressure of 1000 kg/cm2 or greater.

　　按介质温度分

　　Divided by medium temperature

　　普通阀门：－40至450℃（介质温度）}的阀门。

　　Ordinary valves: valves ranging from -40 to 450 ℃ (medium temperature).

　　高温阀门：450至600℃（介质温度）的阀门。

　　High temperature valve: a valve with a temperature range of 450 to 600 ℃ (medium temperature).

　　耐热阀门：600℃以上（介质温度）的阀门。

　　Heat resistant valve: a valve with a medium temperature above 600 ℃.

　　低温阀门：－40至－70℃（介质温度）的阀门。

　　Low temperature valve: a valve with a temperature range of -40 to -70 ℃ (medium temperature).

　　深冷阀门：－70至－196℃（介质温度）的阀门。

　　Cryogenic valve: a valve with a temperature range of -70 to -196 ℃ (medium temperature).

　　超低温阀门：－196℃以下（介质温度）的阀门。

　　Ultra low temperature valve: a valve with a medium temperature below -196 ℃.

　　按公称通径分

　　Divided by nominal diameter

　　小口径：公称通径小于40毫米的阀门。

　　Small caliber: valves with a nominal diameter less than 40 millimeters.

　　中口径：公称通径50至300毫米的阀门。

　　Medium caliber: valves with a nominal diameter of 50 to 300 millimeters.

　　大口径：公称通径350至1200毫米的阀门。

　　Large caliber: valves with nominal diameters ranging from 350 to 1200 millimeters.

　　特大口径：公称通径大于1400毫米的阀门。

　　Extra large caliber: valves with a nominal diameter greater than 1400 millimeters.

　　以上分类并不是绝对的，可以从其他角度分类，只需掌握了这些基本分类，对了解品类繁多的阀门还是有很大好处的。

　　The above categories are not absolute and can be classified from other perspectives. As long as you master these basic categories, it is still very beneficial for understanding the wide variety of valve categories.

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