阀门的驱动方式

阀门按驱动方式，根据不同的驱动方式可分：

1. 手动：借助手轮、手柄、杠杆或链轮等，有人力驱动，传动较大力矩时，装有蜗轮、齿轮等减速装置。

2. 电动：借助电击或其他电气装置来驱动。

3. 液动：借助(水、油)来驱动。

4. 气动;借助压缩空气来驱动。

四、按压力，根据阀门的公称压力可分：

1. 真空阀：绝对压力<0.1MPa即760mm汞柱高的阀门，通常用mm汞柱或mm 　　水柱表示压力。

2. 低压阀：公称压力PN≤1.6MPa的阀门(包括PN≤1.6MPa的钢阀)

3. 中压阀：公称压力PN2.5—6.4MPa的阀门。

4. 高压阀：公称压力PN10.0—80.0MPa的阀门。

5. 超高压阀：公称压力PN≥100.0MPa的阀门。

五、按介质的温度分，根据阀门工作时的介质温度可分：

1. 普通阀门：适用于介质温度-40～425℃的阀门。

2. 高温阀门：适用于介质温度425～600℃的阀门。

3. 耐热阀门：适用于介质温度600℃以上的阀门。

4. 低温阀门：适用于介质温度-40～-150℃的阀门。

5. 超低温阀门：适用于介质温度-150℃以下的阀门。

Valve according to the driving mode, according to different driving mode can be divided:

 

1. Manual: with the help of hand wheel, handle, lever or sprocket, there is human drive, transmission torque is large, equipped with worm gear, gear and other reduction devices.

 

2. Electric: driven by electric shock or other electrical devices.

 

3. Hydraulic: driven by (water, oil).

 

Pneumatic; 4. Powered by compressed air.

 

Four, according to the pressure, according to the nominal pressure of the valve can be divided:

 

1. Vacuum valve: absolute pressure < 0.1mpa, that is, 760mm mercury high valve, usually with mm mercury or MM water column to represent the pressure.

 

2. Low pressure valve: nominal pressure PN≤ 1.6mpa valve (including PN≤ 1.6mpa steel valve)

 

3. Medium pressure valve: nominal pressure PN2.5-6.4mpa valve.

 

4 high pressure valve: nominal pressure PN10.0-80.0MPa valve.

 

5. Ultra high pressure valve: nominal pressure PN≥100.0MPa valve.

 

Five, according to the temperature of the medium, according to the valve working medium temperature can be divided:

 

1. Ordinary valve: suitable for medium temperature -40 ~ 425℃ valve.

 

2. High temperature valve: suitable for the medium temperature of 425 ~ 600℃ valve.

 

3. Heat resistant valve: suitable for the medium temperature of 600℃ or above the valve.

 

4 low temperature valve: suitable for medium temperature -40 ~ -150℃ valve.

 

5 ultra-low temperature valve: suitable for the medium temperature below -150℃ valve.低温阀门（cryogenic valve）≥-196°C

 

高温带散热层阀门（High temperature cooling layer valve） ≤500°C