Maxitrol MR212D-1212 Valve

The Maxitrol MR212D-1212 is a heavy-duty 1-1/2" NPT modulating gas valve and regulator engineered specifically for direct-fired (negative pressure) burners used in high-demand industrial and commercial HVAC systems. This dual-function component provides precise gas flow modulation and pressure regulation in a single unit, rated for a maximum inlet pressure of 5 PSI. Designed for reliability in air handling units, industrial ovens, and makeup air systems, the MR212D-1212 ensures stable combustion even under fluctuating burner demands. Its rugged construction supports Selectra modulation systems, offering the responsive control required for accurate temperature maintenance and optimized fuel efficiency. Whether you are performing a field replacement or a new installation, this Maxitrol gas pressure regulator delivers the consistent discharge pressure needed for negative pressure burner manifold configurations.

Key Benefits for Contractors:

• High Pressure Capability: Rated for up to 5 PSI inlet pressure, eliminating the need for additional upstream step-down regulators in many configurations.
• Precise Modulation: Specifically tuned for direct-fired burner systems to provide smooth, hunting-free gas flow control.
• Compact Integration: Combines pressure regulation and modulation into one footprint, reducing labor time and potential leak points during installation.
• NPT Compatibility: Standard 1-1/2 inch NPT threads ensure seamless integration with existing commercial iron pipe headers.
• Industrial Durability: Engineered by Maxitrol to withstand the high-cycle demands of industrial process heating and makeup air applications.

Common Questions & Technical Insights:

Can the MR212D-1212 be used with positive pressure burners?
While optimized for negative pressure (direct-fired) applications, it is compatible with positive pressure burner systems provided the pilot and manifold pressures align with the Maxitrol MR series technical specifications.

What modulation system is required for this valve?
This valve is designed to work with Selectra electronic modulation controls. Ensure your signal output matches the requirements of the MR212 series coil for proper operation.

Is this valve suitable for Natural Gas or Propane?
The Maxitrol MR212D-1212 is commonly used with both, but always verify the specific spring range and orifice sizing for your fuel type and BTU requirements before commissioning.

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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.