VGD40.100U Siemens Gas Valve

Overview

The Siemens VGD40.100U is a high-capacity, 4-inch flanged double gas valve body designed for use in commercial and industrial combustion plants. This normally closed, modular valve integrates two safety shut-off valves into a single, compact body, facilitating the construction of efficient gas trains. When paired with Siemens SKP series electro-hydraulic actuators, it provides essential functions such as safety shut-off, gas pressure regulation, and air-gas ratio control. Its patented seat construction and double-seat design ensure reliable shut-off and high flow rates, making it a critical component for large industrial burner systems.

Features

• Dual Safety Shut-Off: Consists of two safety shut-off valves in series within a single aluminum body.
• High Flow Capacity: Each individual valve features double seats to maximize flow and reduce pressure drop.
• Patented Seat Design: Individual closing springs for each seat ensure independent, reliable shut-off and a high close-off pressure rating.
• Integrated Filtration: A standard, internal stainless steel mesh filter (0.9 mm) protects valve seats and downstream components from contamination.
• Modular Compatibility: Designed to be used with any SKP series electro-hydraulic actuator, allowing for slow opening and rapid closing.
• Pressure Monitoring: Includes multiple 1/4-inch NPT pressure taps on the inlet, outlet, and between valves for easy testing.
• Flexible Installation: Full port vent line connection plates are available as separate accessories.

Specifications

• Model: VGD40.100U
• Connection Size: 4-inch ANSI Flanged (DN100)
• Body Material: Die-cast aluminum
• Maximum Operating Pressure: 10 psi (700 mbar)
• Close-Off Pressure: 30 psi
• Capacity: 9,680 CFH (Natural Gas at 1-inch W.C. pressure drop)
• Permissible Gases: Natural gas, propane, butane, air, and non-corrosive gases
• Operating Temperature: 5 F to 140 F (-15 C to 60 C)
• Approvals: UL listed, FM approved, CSA certified, IRI approvable, and ISO 9001/14000 certified

Applications

• Industrial and commercial gas-fired combustion plants.
• Gas trains for forced draft burners.
• Safety shut-off systems when used with SKP15 series actuators.
• Combined shut-off and pressure regulation when used with SKP25, SKP55, or SKP75 series actuators.
• High-demand burner cycles in HVAC and boiler systems requiring compact, high-flow gas control.