VGD20.503 Siemens Gas Valve
$1,076.10
The Siemens VGD20.503 is a 2 inch double-body gas valve designed for integration into gas trains to provide reliable safety shut-off control. As a class A valve conforming to EN 161 standards, it features a normally closed modular design that consists of two safety shut-off valves in series. When combined with Siemens SKP series electro-hydraulic actuators, the VGD20.503 facilitates critical functions such as gas pressure regulation and air-to-gas ratio control for commercial and industrial burner applications.
Overview
The Siemens VGD20.503 is a 2 inch double-body gas valve designed for integration into gas trains to provide reliable safety shut-off control. As a class A valve conforming to EN 161 standards, it features a normally closed modular design that consists of two safety shut-off valves in series. When combined with Siemens SKP series electro-hydraulic actuators, the VGD20.503 facilitates critical functions such as gas pressure regulation and air-to-gas ratio control for commercial and industrial burner applications. Its robust construction and integrated filtration system ensure long-term durability and protection for downstream components.
Features
- Dual-valve design incorporates two safety shut-off valves within a single compact body for enhanced safety and reduced footprint
- Integrated stainless steel mesh strainer with a 0.9 mm mesh size protects valve seats and downstream equipment from debris
- Specialized valve discs featuring a flat inlet disc for safety shut-off and a contoured outlet disc for precise pressure regulation
- Flexible mounting options with exchangeable pilot gas flanges and universal mounting plates that can be fitted on either side
- High-precision dual stem guides ensure accurate disc alignment and tight, reliable shut-off
- Compatible with a wide range of gases including gas families I, II, III, and air
Specifications
- Model: VGD20.503
- Connection Size: 2 inch (available in NPT or BSP threaded versions)
- Maximum Operating Pressure: 150 kPa (1.5 bar / 20 psi)
- Static Pressure Rating: Up to 1200 mbar when closed
- Flow Capacity: Approximately 100 m3/h
- Permissible Gas Temperature: 14 F to 140 F (-10 C to 60 C)
- Body Material: Die-cast aluminum
- Vent Connection: 3/4 inch or 1 inch NPT/BSP vent port located between valves
- Weight: Approximately 3.2 kg (7.1 lbs)
Applications
- Industrial and commercial gas-fired combustion plants and boilers
- Integration into gas trains for forced draft gas burners
- Safety shut-off combined with pressure regulation when used with SKP25, SKP55, or SKP75 actuators
- Standard safety shut-off service when paired with SKP15 series actuators
- HVAC systems requiring precise air/gas ratio control in high-demand environments
| Weight | 12 lbs |
|---|---|
| Dimensions | 11 × 8 × 6 in |
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