VGD40.080 Siemens Gas Valve

Overview

The Siemens VGD40.080 is a high-performance double gas valve body designed for use in gas trains to provide safety shut-off control for industrial and commercial burners. This compact unit integrates two Class A safety shut-off valves in series within a single housing, significantly reducing the space and weight of the gas train compared to using individual valves. Engineered for reliability, it features a patented seat construction with individual closing springs for each seat to ensure a tight seal and a high close-off pressure rating. The VGD40.080 is typically combined with two Siemens SKP series electro-hydraulic actuators to perform functions such as safety shut-off, gas pressure regulation, or air-gas ratio control.

Features

• Dual safety shut-off valves integrated into a single compact body for space-saving gas train designs
• Double-seat architecture in each valve to achieve high flow rates with minimal pressure drop
• Patented seat construction with independent closing springs for reliable shut-off and high close-off pressure
• Internal stainless steel mesh strainer (0.9 mm) to protect valve seats and downstream components from debris
• Modular design compatible with all SKP15, SKP25, SKP55, and SKP75 series electro-hydraulic actuators
• Die-cast aluminum body construction providing durability and a lightweight profile
• Dual stem guides for precise disc alignment and long-term operational consistency
• Integrated pressure test points (1/4 inch NPT) for easy system monitoring and commissioning

Specifications

• Model: VGD40.080 / VGD40.080U
• Nominal Size: 3 inch (DN80)
• Connection Type: NPT Threaded (U-version) or ANSI Flanged
• Maximum Operating Pressure: 10 psi (700 mbar)
• Close-off Pressure: 75 psi
• Capacity: Approximately 5,370 CFH (Natural Gas at 1 inch W.C. pressure drop)
• Flow Rate: 250 m3/h (Air at 10 mbar pressure drop)
• Body Material: Die-cast aluminum
• Operating Temperature: 5 F to 140 F (-15 C to 60 C)
• Approvals: UL listed, FM approved, CSA certified, and CE marked

Applications

• Main gas supply lines for commercial and industrial forced draft burners
• Gas trains requiring double block-and-bleed safety configurations
• Supervision of gas families I, II, and III (natural gas, propane, and butane)
• Combined safety shut-off and pressure regulation when used with SKP25 actuators
• Air-gas ratio control systems in boiler and HVAC applications using SKP55 or SKP75 actuators