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| 西門子SKP70...系列燃氣閥門執行器 |
| SKP70...系列燃氣閥門執行器
品牌：SIEMENS（西門子）
產地：德國 |
| 產品介紹 |
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Air / gas ratio controllers with integrated safety shutoff function for natural gas, town gas or liquid gas in the low pressure range. Electro-hydraulic actuator for delayed opening and rapid closing.
The VG… gas valves with their electro-hydraulic SKP70... actuators are designed for use with gas families I, II, III and with air. They are used primarily in gas-fired combustion plant. The actuators open slowly and close rapidly. All types of VG… gas valves can be combined with the SKP70... actuators which are fitted to the valve body by means of 4 screws contained in the terminal compartment. The square flange can be turned in steps of 90°, thus offering a choice of 4 different mounting positions. The actuator can be mounted or replaced while the valve is under pressure. Sealing materials are not required. The SKP70... features an integrated precision gas pressure controller. This type of actuator with its integrated controller not only reduces the length of the gas train, but usually also permits the selection of a smaller valve size (refer to Flow chart in the valve′s data sheet). The actuator can also be supplied with limit or auxiliary switches, e.g. for indicating the fully closed position.
The SKP70... for use with forced draught gas burners controls the pressure of the combustion air so that the gas to air ratio remains constant over the entire output range (shifting the setpoint by the static pressure of the combustion air). Changes in the air volume caused by voltage fluctuations, dirty fan wheels and the like have therefore no impact on the quality of the combustion process – in contrast to conventional ratio control. Using the SKP70..., deviations from the correct gas to air ratio caused by varying pressures in the combustion chamber can be eliminated in a straightforward manner. To accomplish this, the SKP70... can be connected to the combustion chamber via an additional impulse pipe, using the combustion chamber pressure as a disturbance value. |
| 型號表 |
| 主電壓 |
AC100...110V |
AC220...240V |
|
標準版本 |
| 不帶輔助開關IV |
- |
SKP70.110B27 |
| 帶輔助開關IV |
SKP70.111B17 |
SKP70.111B27 |
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大型號版本 |
| 帶輔助開關IV |
- |
- |
| 不帶輔助開關IV |
SKP70.121B17 |
SKP70.121B27 | |
| 技術參數 |
| 主要參數 |
| 主要電壓 |
AC220V -15%...AC240V +10% |
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AC100V -15%...AC110V +10% |
| 主頻率 |
50...60Hz ±6% |
| 功率 |
9...13.5VA |
| 輔助開關 |
6A,AC250V |
| 輔助開關設置范圍 |
4...96% |
| 全部開啟時間 |
6...12s |
| 關閉時間 |
<1s |
| 負荷從大轉小時的最小時間 |
5s |
| 允許測試壓力（燃氣） |
1bar |
| 允許運行壓力（燃氣） |
200mbar |
| 保護等級 |
IP54 |
| 重量 |
| 不帶壓力控制器 |
1250g |
| 帶壓力控制器 |
1650g | | |
| 環境條件 |
| 運輸環境 |
IEC 721-3-2 |
| 內部條件 |
class 2K2 |
| 機械條件 |
class 2M2 |
| 溫度范圍 |
-15...+60ºC |
| 濕度 |
<95% |
| 運行環境 |
IEC 721-3-3 |
| 內部條件 |
class 3K5 |
| 機械條件 |
class3M2 |
| 溫度范圍 |
-15...+60ºC(低于0ºC，打開時間增加) |
| 濕度 |
<95% |
| 不得進水 | | | |
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