Maxitrol M511R-3/4 Valve

The Maxitrol M511R-3/4 is a precision-engineered modulating gas valve specifically designed for direct-fired burners in negative pressure (pull-through) systems. As a critical component of the Maxitrol Selectra Series 14, 44, 94, and SC10 control systems, this valve provides instantaneous, non-fluctuating temperature control without the need for mechanical motors or butterfly linkages. It features a 3/4" NPT connection and a right-side outlet configuration to accommodate tight industrial heater cabinets. The integrated low-fire bypass adjustment, also located on the right side, allows for precise field calibration of the minimum firing rate to ensure stable combustion during low-demand cycles. Operating with a maximum inlet pressure of 1/2 PSI, the M511R functions as a dedicated modulator, requiring an upstream regulator to manage high-fire manifold pressure. Its linear response to DC control signals from Selectra amplifiers ensures repeatable performance and high turndown ratios in makeup air units and process heating applications.

• Precise Modulation: Provides continuous flame adjustment for stabilized area heating and consistent process temperatures.
• Negative Pressure Compatibility: Engineered specifically for direct-fired negative pressure burners often found in industrial makeup air systems.
• Simplified Maintenance: No external mechanical activation or moving linkages to wear out, reducing long-term service requirements.
• Compact Installation: Features a right-side outlet and bypass adjustment for easier access in HVACR equipment enclosures.

• Does the M511R-3/4 regulate gas pressure? No, the M-series valves are modulators only. You must use a separate upstream gas pressure regulator to set your high-fire manifold pressure.
• Can this be used with LP gas? Yes, the Maxitrol M511R-3/4 is compatible with natural, manufactured, mixed, and liquefied petroleum (LP) gases.
• What control systems are compatible? This valve is designed to work with Maxitrol Series 14, 44, 94, and SC10 electronic modulation systems.

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.