|
|
 |
|
 |
如果您对该产品感兴趣的话,可以 
产品名称:
SKP10系列
产品型号:
SKP10
产品展商:
上海霍平实业发展有限公司
简单介绍
Valve actuators for safety shut-off valves open/closed.
Two-stage or with integrated constant pressure governor.
Datasheet contains dimensions for valves VGF..., VGG... and VGH... .
|
SKP10系列
的详细介绍 |
|
USE
The VG... gas valves with their electrohydraulic SKP... actuators are designed for gas families I, II, III and air. They are used primarily in gas-fired combustion plant. The valves open slowly and close rapidly. All types of VG... gas valves can be combined with the available types of actuators. The actuator is fitted to the valve body by means of the 4 screws contained in the terminal compartment. The square flange can be turned in steps of 90°, thus providing 4 different mounting positions. The actuator can be fitted or replaced while the valve is under pressure. Sealing materials are not required.
Actuator type SKP2... is equipped with an integrated precision gas pressure governor. This type of actuator with gas pressure governor not only reduces the length of the gas train, but usually also permits selection of a smaller valve size. For detailed information about valve sizing, refer to ?Flow chart?. The actuator is also available with limit and auxiliary changeover switches, e.g. for indicating the fully closed position or for stroke limitation in connection with 2-stage gas release, etc.
The SKP20.130... operates as a balanced gas pressure governor and controls the gas pressure according to the pressure of the combustion air so that the gas / air ratio remains constant over the entire load range (shifting the setpoint by the static pressure of the combustion air).
Therefore – in contrast to conventional gas / air ratio control – air volume changes due to mains pressure variations, soiled fan wheel, etc., have no impact on the quality of the combustion process.
Mechanical design
Actuator SKP1...
The actuator’s hydraulic drive system consists of a cylinder filled with oil and an electric oscillating pump with piston and relief valve. The relief valve is located in the bypass between the suction and pressure side of the pump. With the actuators of the B-series, it is a valve hydraulically actuated by the pump pressure; with the 2-stage actuators of the A-series, it is a normally open solenoid valve. The cylinder carries a seal which hydraulically separates the inlet from the outlet side of the pump, also serving as a guidance for the piston. The piston is also guided by a rod which is rigidly connected to it. This rod transfers the piston’s travel directly to the valve stem. The rod is provided with a disk the position of which is visible through a window in the console (indication of stroke).
Using a lever system, the disk also actuates
- the auxiliary switch for indicating the fully closed position, or
- other positions, as well as the limit changeover switches for positioning the lowand high-fire stroke with the two-stage actuators.
The switching points of these switches are adjustable over the entire stroke. The adjusting screws are located in the terminal compartment.
|
 |
|
|