Siemens VGD Series
Double Gas Valves for Industrial Burner Safety Shutoff Systems. Ensuring redundant isolation and system integrity.
What is the Siemens VGD Series?
The Siemens VGD Series consists of double gas valves designed for safety shutoff and controlled gas flow in industrial combustion systems.
These valves are engineered to provide reliable gas isolation in accordance with industrial burner safety standards. In case of flame failure or control system shutdown, the VGD valve assembly ensures immediate interruption of gas supply.
Role in Combustion Safety Architecture
Within a typical industrial burner system:
- The burner control unit manages ignition and flame supervision
- The actuator regulates air and fuel positioning
- The VGD gas valve ensures safe fuel isolation
The VGD Series functions as the primary safety barrier preventing unintended gas flow during system faults or shutdown conditions.
Typical Applications
VGD Series gas valves are widely used in:
- Industrial gas-fired burners
- Commercial boiler systems
- Process heating installations
- Furnace combustion systems
- Dual-stage and modulating burner assemblies
They are particularly suitable for systems requiring redundant shutoff functionality.
Double Shutoff
Dual valve design provides redundant safety for critical gas isolation.
Fast Closing
Rapid response time ensures immediate gas interruption during faults.
Safety Standards
Compliant with global industrial burner safety regulations.
Industrial Design
Rugged construction suitable for demanding plant environments.
Core Functional Characteristics
All VGD Series valves share the following safety-oriented features:
- Double valve (dual safety shutoff) configuration
- Electrically actuated solenoid operation
- Fast closing time (< 1 second)
- Designed for industrial gas pressure ranges
- Compatible with burner management systems
The dual-valve configuration enhances operational safety by providing redundant shutoff protection.
Why Double Gas Valves Matter
In industrial combustion systems, safe gas isolation is critical. Double gas valves provide:
- Redundant safety shutoff
- Reduced leakage risk
- Compliance with industrial burner safety standards
- Increased protection against uncontrolled gas flow
This design ensures that gas supply is interrupted immediately if a flame fault or control failure is detected.
Frequently Asked Questions
What is the primary function of the Siemens VGD Series?
The Siemens VGD Series is designed to provide precise and reliable control for industrial combustion systems, ensuring optimal performance, safety, and energy efficiency across various heating applications.
How do I select the right model within the VGD Series?
Selecting the correct model depends on your specific application requirements, including operating voltage, required torque or capacity, and control logic (e.g., on-off vs. modulating). Refer to the model overview table above or contact our engineering team for technical assistance.
Are VGD Series components suitable for retrofitting existing systems?
Yes, Siemens designs the VGD Series with standardization in mind, making them excellent choices for both new installations and retrofitting older or legacy combustion systems to meet modern safety and emissions standards.
Selection Guide
When selecting a VGD gas valve, consider:
- Required Gas Flow: Match valve size to burner capacity (kW/BTU).
- Connection Size: DN40, DN50, DN80, etc.
- Operating Pressure: Ensure the valve is rated for the inlet gas pressure.
- Electrical Voltage: Standard coil voltages (110V / 230V).
Integration with Burner Control Systems
VGD Series gas valves are typically integrated with:
- Siemens burner control units (LME / LDU / LMV Series)
- Flame supervision systems
- Gas pressure switches
- Combustion air management systems
The burner control unit energizes the valve during safe ignition sequences and de-energizes it immediately upon fault detection.
Selection Guide
Gas Flow Rate
Match valve size to capacity.
Pressure Rating
Check inlet pressure compatibility.
Connection Type
Threaded (Rp) or Flanged (DN).