閥門的驅(qū)動(dòng)方式

閥門按驅(qū)動(dòng)方式，根據(jù)不同的驅(qū)動(dòng)方式可分：

1. 手動(dòng)：借助手輪、手柄、杠桿或鏈輪等，有人力驅(qū)動(dòng)，傳動(dòng)較大力矩時(shí)，裝有蝸輪、齒輪等減速裝置。

2. 電動(dòng)：借助電擊或其他電氣裝置來驅(qū)動(dòng)。

3. 液動(dòng)：借助(水、油)來驅(qū)動(dòng)。

4. 氣動(dòng);借助壓縮空氣來驅(qū)動(dòng)。

四、按壓力，根據(jù)閥門的公稱壓力可分：

1. 真空閥：絕對(duì)壓力<0.1MPa即760mm汞柱高的閥門，通常用mm汞柱或mm 　　水柱表示壓力。

2. 低壓閥：公稱壓力PN≤1.6MPa的閥門(包括PN≤1.6MPa的鋼閥)

3. 中壓閥：公稱壓力PN2.5—6.4MPa的閥門。

4. 高壓閥：公稱壓力PN10.0—80.0MPa的閥門。

5. 超高壓閥：公稱壓力PN≥100.0MPa的閥門。

五、按介質(zhì)的溫度分，根據(jù)閥門工作時(shí)的介質(zhì)溫度可分：

1. 普通閥門：適用于介質(zhì)溫度-40～425℃的閥門。

2. 高溫閥門：適用于介質(zhì)溫度425～600℃的閥門。

3. 耐熱閥門：適用于介質(zhì)溫度600℃以上的閥門。

4. 低溫閥門：適用于介質(zhì)溫度-40～-150℃的閥門。

5. 超低溫閥門：適用于介質(zhì)溫度-150℃以下的閥門。

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.低溫閥門（cryogenic valve）≥-196°C

 

高溫帶散熱層閥門（High temperature cooling layer valve） ≤500°C