Siemens VKF Series
Gas Solenoid Valves for Industrial Burner Fuel Safety Control. Reliable fuel shut-off and admission for combustion systems.
Series Overview
The Siemens VKF Series consists of gas solenoid valves designed for fuel shut-off and control in industrial and commercial burner systems. These valves function as safety-relevant fuel control components within combustion systems. They are electrically actuated and operate as part of the burner safety chain, ensuring that fuel gas is only released when all required safety conditions are satisfied.
Within a combustion control architecture, the VKF Series is positioned as a controlled fuel admission device, directly governed by the burner control unit.
Functional Role in Burner Systems
In a typical industrial gas burner configuration, VKF solenoid valves operate together with:
- Burner control units (e.g., LME, LDU, LMV systems)
- Gas pressure switches (e.g., QPD Series)
- Air pressure switches (e.g., QPL Series)
- Flame supervision devices (e.g., LFS Series)
Operational sequence:
- Airflow and gas pressure verified.
- Burner controller initiates ignition.
- VKF solenoid valve opens to allow fuel supply.
- Flame detection confirms ignition.
- Continuous supervision maintained.
If any safety condition fails, the burner control unit immediately de-energizes the VKF valve, closing fuel supply. This positions the VKF Series as a core element in fuel safety management.
Typical Applications
VKF Series gas solenoid valves are commonly used in:
- Industrial gas burners
- Commercial gas-fired boilers
- Process heating systems
- Furnace and oven combustion systems
- Dual-fuel burner installations (gas supply side)
They are suitable for installations where rapid and reliable gas shut-off is required.
Safety Shut-Off
Normally closed design ensures immediate fuel interruption upon power loss or safety trip.
Industrial Design
Robust construction engineered for reliability in demanding industrial combustion environments.
Core Technical Characteristics
While specific models differ in size and configuration, VKF Series valves typically feature:
- Electromagnetic Actuation: Reliable solenoid operation for fast response times.
- Normally Closed Configuration: Failsafe design ensures valve closure on power loss.
- Fast Opening / Closing: Rapid response to control signals for precise ignition and shut-off.
- Industrial Construction: Robust design for longevity in demanding environments.
- Safety Compliance: Engineered to meet strict combustion safety requirements.
Model Differentiation Logic
Different VKF models are defined primarily by:
- Nominal diameter (flow capacity)
- Operating pressure range
- Electrical voltage specification
- Connection type (Flanged / Threaded)
- Flow characteristics
Model selection depends on burner capacity, gas supply pressure, and required shut-off response time.
VKF Series Variants
| Variant Type | Flow Capacity | Typical Application |
|---|---|---|
| Compact VKF models | Lower flow range | Small commercial burners |
| Standard VKF models | Medium flow capacity | Industrial boiler systems |
| High-capacity VKF models | Larger flow range | Industrial process burners |
Note: Exact specifications vary by individual model.
Safety Chain Positioning
Within combustion system architecture, the VKF Series performs:
Fuel Admission Control → Safety Shut-Off → System Protection
Safety logic flow:
- System safety conditions verified.
- VKF valve energized to allow gas flow.
- Continuous flame supervision active.
- If fault detected, VKF valve immediately closes.
This makes the VKF Series a critical fuel control element in combustion safety chains.
Selection Guide
Select compact VKF models for applications with lower gas flow requirements.
Use standard VKF versions for reliable fuel control in mid-sized heating systems.
Choose high-capacity variants for large industrial burners requiring significant fuel volume.
Valve Sizing Support
Ensure proper flow capacity and pressure ratings. Our team can help size the correct valve for your application.
Contact an Expert