Viessmann 7134747 Gas Valve

The Viessmann 7134747 Gas Valve is a critical combustion control component engineered for high-efficiency Vitodens 200 WB2 and WB2A series boilers. This OEM replacement gas valve is a 20V, normally closed (NC) two-way solenoid valve designed to regulate the flow of natural gas or liquid propane to the burner assembly. Identified by the R10 designation, this valve features a precise 10-ohm internal resistance, ensuring exact signal communication with the boiler control logic for stable modulation. As a gas valve without orifice, this unit requires the technician to transfer the existing fixed orifice or utilize a specific conversion kit to match the appliance's firing rate and fuel type. Professionals servicing Vitodens 200-W models rely on this valve for its consistent manifold pressure regulation and durable solenoid construction. Integrating this genuine Viessmann part restores the precision of the combustion air-gas ratio, maintaining optimal AFUE ratings and operational safety in hydronic heating systems.

• Direct OEM Compatibility: Specifically calibrated for Viessmann Vitodens 200 WB2/WB2A boiler series.
• Precise Electrical Response: The R10 (10-ohm) internal resistance provides accurate 20V signal processing for reliable opening and closing cycles.
• Multi-Fuel Support: Suitable for both Natural Gas and Liquid Propane (LPG) configurations when used with the appropriate orifice.
• Optimized Combustion: Helps maintain steady gas flow to the burner, reducing CO emissions and preventing modulation errors.

• Does this gas valve include the orifice? No, the Viessmann 7134747 is supplied without the orifice. You must swap the orifice from the failed valve or install a new one from a fuel conversion kit.
• Which boiler models use this valve? It is designed for the Vitodens 200 series, including WB2 and WB2A variants (6-24, 8-32, 11-44, and 15-60).
• Can I use this for a 120V system? No, this is a 20V low-voltage component. Verify your control board output before installation to prevent electrical damage.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.