Siemens Actuator SKP25 Series
Product Description
Siemens SKP25 Series Gas Valve Actuators with Pressure Governors
Siemens SKP25 Series actuators combine electrohydraulic gas valve operation with integrated gas pressure regulation. They are engineered for industrial burner installations and combustion systems requiring controlled gas supply pressure and dependable safety shutoff.
When installed on compatible Siemens VGx/VRx gas valves, the SKP25 controls valve opening, closes rapidly during shutdown, and regulates gas pressure to the selected setting. These actuators are primarily used in forced-draft gas burner systems and industrial combustion equipment.
Key Features
- Electrohydraulic gas valve actuator incorporating a gas pressure governor
- Gas pressure control through a setpoint spring or combustion air pressure signal, depending on the actuator version
- Controlled, damped valve opening and fast closing for gas safety shutoff
- Designed for compatible Siemens VGx/VRx gas valves
- Supports gas families I-III, subject to the connected valve's suitability
- Integrated valve stroke indication
- Optional factory-adjusted end switch for closed-position indication
- IP54 enclosure protection, with IP65 possible using specified accessories
SKP25 Actuator Variants
- SKP25.0: Constant gas pressure control for mechanical or electronic air/fuel ratio systems
- SKP25.2: Two-stage gas pressure setpoint switching
- SKP25.3: Proportionate gas pressure governing
- SKP25.4: High-pressure control with regulation ranges reaching 200 kPa
- SKP25.6: Zero-pressure gas governor
Industrial Applications
- Industrial gas burner installations
- Steam boiler and industrial boiler systems
- Forced-draft gas-fired burners
- Gas train pressure regulation systems
- Industrial process heating equipment
- Gas-fired combustion control installations
Selection Note: Confirm the exact actuator model, rated supply voltage, pressure regulation range and compatibility with the selected gas valve before ordering. Installation and commissioning must be carried out by qualified personnel.
Specifications
Siemens SKP25 Electrohydraulic Actuators – Technical Data
| Manufacturer | Siemens |
|---|---|
| Actuator Family | SKP25 Series |
| Product Classification | Electrohydraulic Gas Valve Actuator |
| Integrated Control Function | Gas Pressure Governor |
| Primary Functions | Gas pressure regulation and safety shutoff with compatible gas valves |
| Rated Supply Voltage | AC 230 V (-15%/+10%) - E2 models AC 120 V (-15%/+10%) - E1 models Japan-specific versions available |
| Power Supply Frequency | 50/60 Hz ±6% (European versions) |
| Electrical Power Requirement | Maximum 10 VA (standard Ex versions) Maximum 35 VA (SKP25.2xxEx, stage 2) |
| Valve Closing Response | Less than 1 second |
| Typical Valve Opening Rate | Approximately 2 mm/s |
| Ingress Protection | IP54 / IP65 with specified AGA66 accessories and installation |
| Electrical Protection Class | Class I |
| Applicable Gas Families | I-III |
| Maximum Permissible Working Pressure | 120 kPa - SKP25.0/.2/.3/.6 230 kPa - SKP25.4 with VGJ valve |
| Ambient Operating Temperature | -10 to +60°C (general range; model-specific restrictions apply) |
| Permitted Duty Cycle | 100% |
| Approximate Actuator Weight | 1.6 kg (SKP25.0) 2.1 kg (SKP25.2) |
| Compatible Siemens Gas Valves | Siemens VGx/VRx Series, subject to compatibility requirements |
SKP25 Model Comparison – Gas Pressure Regulation Ranges
| Actuator Model | Gas Pressure Adjustment Range |
|---|---|
| SKP25.0 | 0.05-25 kPa |
| SKP25.2 | 0.2-6 kPa |
| SKP25.2xxxxL | 0.2-2 kPa |
| SKP25.3 | 0.05-5 kPa |
| SKP25.4 | 7-200 kPa |
| SKP25.6 | Zero-pressure governor (regulating pressure below atmospheric reference) |
Technical Note: The available regulation range varies with the actuator configuration and selected setpoint spring. The maximum permissible working pressure of the complete valve assembly is determined by its lowest-rated component.
Product Specifications
Siemens SKP25 Electrohydraulic Actuators – Technical Data
| Manufacturer | Siemens |
|---|---|
| Actuator Family | SKP25 Series |
| Product Classification | Electrohydraulic Gas Valve Actuator |
| Integrated Control Function | Gas Pressure Governor |
| Primary Functions | Gas pressure regulation and safety shutoff with compatible gas valves |
| Rated Supply Voltage | AC 230 V (-15%/+10%) - E2 models AC 120 V (-15%/+10%) - E1 models Japan-specific versions available |
| Power Supply Frequency | 50/60 Hz ±6% (European versions) |
| Electrical Power Requirement | Maximum 10 VA (standard Ex versions) Maximum 35 VA (SKP25.2xxEx, stage 2) |
| Valve Closing Response | Less than 1 second |
| Typical Valve Opening Rate | Approximately 2 mm/s |
| Ingress Protection | IP54 / IP65 with specified AGA66 accessories and installation |
| Electrical Protection Class | Class I |
| Applicable Gas Families | I-III |
| Maximum Permissible Working Pressure | 120 kPa - SKP25.0/.2/.3/.6 230 kPa - SKP25.4 with VGJ valve |
| Ambient Operating Temperature | -10 to +60°C (general range; model-specific restrictions apply) |
| Permitted Duty Cycle | 100% |
| Approximate Actuator Weight | 1.6 kg (SKP25.0) 2.1 kg (SKP25.2) |
| Compatible Siemens Gas Valves | Siemens VGx/VRx Series, subject to compatibility requirements |
SKP25 Model Comparison – Gas Pressure Regulation Ranges
| Actuator Model | Gas Pressure Adjustment Range |
|---|---|
| SKP25.0 | 0.05-25 kPa |
| SKP25.2 | 0.2-6 kPa |
| SKP25.2xxxxL | 0.2-2 kPa |
| SKP25.3 | 0.05-5 kPa |
| SKP25.4 | 7-200 kPa |
| SKP25.6 | Zero-pressure governor (regulating pressure below atmospheric reference) |
Technical Note: The available regulation range varies with the actuator configuration and selected setpoint spring. The maximum permissible working pressure of the complete valve assembly is determined by its lowest-rated component.
Company Information
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