Overview
The Siemens SKP25.012U2 is a high-performance electro-hydraulic actuator designed to provide safety shut-off and gas pressure regulation in a single, compact unit. Engineered for industrial and commercial burner applications, it is used in combination with Siemens VG series gas valve bodies. The actuator features a modular design that allows for easy mounting and simplified gas train assembly by reducing the number of required components and fittings. This specific model operates on 220/230Vac and includes integrated Proof of Closure (POC) and auxiliary switches for enhanced system monitoring and safety.
Features
- Safety shut-off and constant pressure regulation combined in one unit
- Integrated Proof of Closure (POC) over-travel switch and auxiliary switch
- Slow opening and fast closing (< 0.8 seconds) for safety-critical operation
- Visible position indicator and “power on” indication light
- Modular design compatible with VG series gas valves from 1/2-inch to 6-inch sizes
- Applicable as a 1:1 air/gas proportionator or zero governor
- Excellent pressure control characteristics with zero regulator droop
- Quick-connect wiring terminals and 360-degree actuator rotation for flexible installation
Specifications
- Model: SKP25.012U2
- Operating Voltage: 220 to 240 Vac (+10% / -15%)
- Operating Frequency: 50 to 60 Hz
- Power Consumption: 13.5 VA
- Protection Rating: IP54 (standard) or NEMA 4 (optional)
- Ambient Operating Temperature: 5 F to 140 F (-15 C to 60 C)
- Maximum Stroke: 1 inch (26 mm)
- Weight: Approximately 1.6 kg (3.5 lbs)
- Approvals: UL Listed, FM Approved, CSA Certified
Applications
- Industrial and commercial gas-fired burner systems
- Large-scale boilers and furnace operations
- Ovens, dryers, and process heating equipment
- Gas train configurations requiring safety shut-off and pressure regulation
- Systems utilizing air/gas ratio control or zero governor applications


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