Maxitrol MR212DH-1010 Valve
The Maxitrol MR212DH-1010 is a high-performance 1 1/4" NPT modulating gas valve and regulator specifically engineered for direct fired burners operating under negative pressure (pull-through) conditions. As a specialized component of the Selectra electronic gas flame modulation system, this valve provides precise, non-fluctuating temperature control without the need for mechanical butterfly valves or motors. It is specifically designed for LP gas applications and can handle a 5 PSI maximum inlet pressure. The MR212 series is field adjustable for negative pressures up to -3.5” w.c., utilizing a robust counter-spring mechanism to ensure the valve remains closed against downward suction until the solenoid is energized. This valve performs the dual function of modulation and pressure regulation, maintaining a constant minimum firing rate via an adjustable bypass to prevent nuisance lockouts and ensure a stable low fire condition in industrial process heating or commercial makeup air units.
Key Benefits- Dual-Function Design: Integrates both modulation and pressure regulation in a single rugged assembly, eliminating the need for a separate upstream regulator.
- Precise Control: Allows for infinite flame adjustment and high turndown ratios (up to 30:1), minimizing equipment cycling and improving thermal efficiency.
- Negative Pressure Optimized: Specifically balanced for pull-through burners where standard regulators might fail to maintain seat integrity.
- Field Flexibility: Factory set for applications up to -1.5” w.c. but field adjustable to handle more demanding -3.5” w.c. negative pressure environments.
- Wide Operating Range: Suitable for extreme environments with an ambient temperature limit ranging from -40°F to 125°F.
Can this valve be used for positive pressure push-through systems?
No, the MR212DH-1010 is designed exclusively for negative pressure "pull-through" applications. Using this valve in a positive pressure system will result in improper regulation and potential safety risks.
Does this valve require an external motor for modulation?
No. The Selectra system uses a solenoid-driven plunger to vary the pressure in the upper chamber, providing instantaneous response without the lag or maintenance requirements of mechanical linkages.
What is the purpose of the adjustable bypass?
The bypass provides a constant minimum firing rate (low fire) when the modulator is not energized, ensuring the burner stays lit during low-demand periods while the safety shut-off remains open.
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.
Original: $911.54
-65%$911.54
$319.04Maxitrol MR212DH-1010 Valve
The Maxitrol MR212DH-1010 is a high-performance 1 1/4" NPT modulating gas valve and regulator specifically engineered for direct fired burners operating under negative pressure (pull-through) conditions. As a specialized component of the Selectra electronic gas flame modulation system, this valve provides precise, non-fluctuating temperature control without the need for mechanical butterfly valves or motors. It is specifically designed for LP gas applications and can handle a 5 PSI maximum inlet pressure. The MR212 series is field adjustable for negative pressures up to -3.5” w.c., utilizing a robust counter-spring mechanism to ensure the valve remains closed against downward suction until the solenoid is energized. This valve performs the dual function of modulation and pressure regulation, maintaining a constant minimum firing rate via an adjustable bypass to prevent nuisance lockouts and ensure a stable low fire condition in industrial process heating or commercial makeup air units.
Key Benefits- Dual-Function Design: Integrates both modulation and pressure regulation in a single rugged assembly, eliminating the need for a separate upstream regulator.
- Precise Control: Allows for infinite flame adjustment and high turndown ratios (up to 30:1), minimizing equipment cycling and improving thermal efficiency.
- Negative Pressure Optimized: Specifically balanced for pull-through burners where standard regulators might fail to maintain seat integrity.
- Field Flexibility: Factory set for applications up to -1.5” w.c. but field adjustable to handle more demanding -3.5” w.c. negative pressure environments.
- Wide Operating Range: Suitable for extreme environments with an ambient temperature limit ranging from -40°F to 125°F.
Can this valve be used for positive pressure push-through systems?
No, the MR212DH-1010 is designed exclusively for negative pressure "pull-through" applications. Using this valve in a positive pressure system will result in improper regulation and potential safety risks.
Does this valve require an external motor for modulation?
No. The Selectra system uses a solenoid-driven plunger to vary the pressure in the upper chamber, providing instantaneous response without the lag or maintenance requirements of mechanical linkages.
What is the purpose of the adjustable bypass?
The bypass provides a constant minimum firing rate (low fire) when the modulator is not energized, ensuring the burner stays lit during low-demand periods while the safety shut-off remains open.
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.
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Description
The Maxitrol MR212DH-1010 is a high-performance 1 1/4" NPT modulating gas valve and regulator specifically engineered for direct fired burners operating under negative pressure (pull-through) conditions. As a specialized component of the Selectra electronic gas flame modulation system, this valve provides precise, non-fluctuating temperature control without the need for mechanical butterfly valves or motors. It is specifically designed for LP gas applications and can handle a 5 PSI maximum inlet pressure. The MR212 series is field adjustable for negative pressures up to -3.5” w.c., utilizing a robust counter-spring mechanism to ensure the valve remains closed against downward suction until the solenoid is energized. This valve performs the dual function of modulation and pressure regulation, maintaining a constant minimum firing rate via an adjustable bypass to prevent nuisance lockouts and ensure a stable low fire condition in industrial process heating or commercial makeup air units.
Key Benefits- Dual-Function Design: Integrates both modulation and pressure regulation in a single rugged assembly, eliminating the need for a separate upstream regulator.
- Precise Control: Allows for infinite flame adjustment and high turndown ratios (up to 30:1), minimizing equipment cycling and improving thermal efficiency.
- Negative Pressure Optimized: Specifically balanced for pull-through burners where standard regulators might fail to maintain seat integrity.
- Field Flexibility: Factory set for applications up to -1.5” w.c. but field adjustable to handle more demanding -3.5” w.c. negative pressure environments.
- Wide Operating Range: Suitable for extreme environments with an ambient temperature limit ranging from -40°F to 125°F.
Can this valve be used for positive pressure push-through systems?
No, the MR212DH-1010 is designed exclusively for negative pressure "pull-through" applications. Using this valve in a positive pressure system will result in improper regulation and potential safety risks.
Does this valve require an external motor for modulation?
No. The Selectra system uses a solenoid-driven plunger to vary the pressure in the upper chamber, providing instantaneous response without the lag or maintenance requirements of mechanical linkages.
What is the purpose of the adjustable bypass?
The bypass provides a constant minimum firing rate (low fire) when the modulator is not energized, ensuring the burner stays lit during low-demand periods while the safety shut-off remains open.
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.
