Overview
The Siemens SKP25.012U1 is a high-performance electro-hydraulic actuator designed for use with VG series gas valve bodies. This multifunctional unit serves as a safety shut-off valve and a constant pressure regulator for industrial and commercial burner applications. By combining these critical functions into a single compact component, it reduces the complexity, size, and weight of the gas train. The actuator features a slow-opening and immediate-closing mechanism upon power interruption to ensure fail-safe operation.
Features
- Integrated safety shut-off and gas pressure regulation in one unit
- Proof of Closure (POC) over-travel switch and an adjustable auxiliary switch
- Modular design allows for 360 degree rotation for flexible installation
- Visual position indicator and “Power On” indication light for easy monitoring
- Slow opening and rapid closing (less than 0.8 seconds) for enhanced safety
- Suitable for use with all VG series gas valve bodies from 1/2-inch to 6-inch sizes
- Agency approvals include UL listed, FM approved, and CSA certified
Specifications
- Model: SKP25.012U1
- Operating Voltage: 110V to 120V AC (50/60 Hz)
- Power Consumption: 13.5 VA
- Protection Rating: IP54 (NEMA 4 optional with AGA66 kit)
- Operating Temperature: 5 F to 140 F (-15 C to 60 C)
- Closing Time: Less than 0.8 seconds
- Weight: Approximately 3.5 lbs (1.6 kg)
- Connection: Four pre-mounted screws for square flange mounting
Applications
- Supervision of gas flames in industrial and commercial burner systems
- Use in boilers, ovens, dryers, and process heating systems
- Applicable as a 1:1 air/gas ratio regulator or zero governor
- Suitable for high-demand burner operations requiring precise manifold pressure control
- Safety shut-off control for gas trains in HVAC and industrial combustion systems



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