Maxitrol MR212DH-1212 Valve

For industrial heating professionals, the Maxitrol MR212DH-1212 is the standard for high-capacity flow control in direct fired burners. This 1 ½" NPT modulating gas valve serves as a dual-function component, providing both precise electronic modulation and steady pressure regulation in a single unit. Engineered specifically for negative pressure applications, or pull-through systems, the MR212DH-1212 utilizes a robust counter-spring mechanism to remain closed against the downward pull of burner suction. It is optimized for LP gas systems with a maximum inlet pressure of 5 PSI and is field-adjustable for negative pressures up to -3.5” w.c., allowing technicians to dial in exact combustion parameters. This Selectra series valve eliminates the need for expensive mechanical butterfly valves and motors, instead using a solenoid-driven plunger to deliver instantaneous response times and non-fluctuating temperature control. Whether you are servicing make-up air heaters or industrial baking ovens, this Maxitrol gas regulator ensures a consistent low-fire bypass rate while maintaining a stable high-fire ceiling for maximum thermal efficiency.

• Precise Modulation: Features electronic control for direct fired gas valves, delivering immediate temperature corrections without mechanical lag.
• Negative Pressure Specialists: Designed exclusively for pull-through burners where standard regulators fail due to suction forces.
• Integrated Pressure Regulation: Combines the Maxitrol modulating regulator and main valve into one body, simplifying the gas train layout.
• Field Adjustability: Factory set for applications up to -1.5" w.c. and adjustable up to -3.5" w.c. for versatile site commissioning.
• High Inlet Rating: Supports 5 PSI inlet pressure, making it suitable for high-demand industrial and commercial gas lines.

Can this valve be used for natural gas?
While the DH-1212 model is optimized for LP applications, the MR212 series is compatible with natural, mixed, and LG-air mixtures; however, always verify the specific orifice and spring configuration for your fuel type.

Is an upstream regulator required?
The Maxitrol MR212DH-1212 has an integral regulator, which differentiates it from the M411 or M511 series. An external upstream regulator is typically only needed if the line pressure exceeds the 5 PSI maximum inlet rating.

What systems is this compatible with?
This valve is designed for use with Maxitrol Selectra Series 14, 24, 44, and 94 systems, as well as SC10 signal conditioners.

This item is not eligible for free shipping.

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.