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西门子执行器


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产品名称: 西门子执行器
产品型号: SKP10... 系列
产品展商: 其他品牌
简单介绍
SKP10....系列 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... .

西门子执行器

的详细介绍

SKP10

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... .


USE

The VG... gas valves with their electrohydraulic SKP... actuators are designed for gas families

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

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

-

The switching points of these switches are adjustable over the entire stroke. The adjusting screws are located in the terminal compartment.

other positions, as well as the limit changeover switches for positioning the lowand high-fire stroke with the two-stage actuators.
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.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).
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