Maxitrol 325-7AL210D-1 1/4L Regulator

The Maxitrol 325-7AL210D-1 1/4L is a heavy-duty 1 1/4 inch NPT gas pressure regulator designed specifically for high-capacity applications in residential, commercial, and industrial fuel systems. This pounds-to-inches regulator is ANSI Z21.80/CSA 6.22 certified, making it a reliable solution for 5 PSI piping systems using natural gas or 2 PSI systems using LP gas. Its robust lever-acting design ensures precise control and positive dead-end lockup, essential for protecting downstream equipment during zero-flow conditions. With a massive 1,250,000 BTU/hr maximum capacity, this unit effectively reduces inlet pressures to a manageable 7-11 inch w.c. outlet range. The integrated Over-Pressure Protection Device (OPD) and factory-installed vent limiters provide critical safety by limiting downstream pressure in the event of a regulator failure. This certified line pressure regulator requires a horizontal upright mounting position when using vent limiting devices to ensure consistent performance across all pilot and main burner loads.

• High-Capacity Performance: Supports up to 1,250,000 BTU/hr, making it suitable for large boilers, furnaces, and multi-appliance commercial manifolds.
• Over-Pressure Protection: Features an integrated OPD (210D) to satisfy stringent safety codes and protect downstream appliance valves from over-pressurization.
• NEMA-Standard Reliability: Durable aluminum housing and lever-acting linkage provide stable regulation from full flow down to 0.15 CFH pilot flows.
• Versatile Fuel Compatibility: Engineered for use with natural, manufactured, mixed, and liquefied petroleum (LP) gases.
• Simplified Installation: Includes vent limiters (12A49/12A39) to eliminate the need for external vent piping in most indoor applications.

Can I install this regulator in any orientation?
No. The Maxitrol 325-7AL210D must be mounted in a horizontal upright position to ensure the vent limiter ball check functions correctly and to maintain the accuracy of the 7-11" wc spring setting.

Is this suitable for outdoor use?
While the 325-L series is often used for indoor piping systems, it can be used outdoors if properly protected from the elements and if the vent is positioned to prevent water or debris from entering the diaphragm chamber.

What is the maximum emergency exposure pressure?
The inlet side is rated for an emergency exposure limit of 65 PSI, though the operational maximum remains 5 PSI for natural gas and 2 PSI for LP with the vent limiter installed.

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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.