Maxitrol 325-3-3/8-12A09 Regulator

The Maxitrol 325-3-3/8-12A09 Regulator is a specialized lever-acting gas regulator designed for high-performance pounds-to-inches pressure reduction in residential, commercial, and industrial applications. Built with a durable aluminum die-cast housing and nitrile rubber self-aligning valve, this 3/8" NPT unit excels in maintaining positive dead-end lock-up, even down to pilot flow rates. It is an essential component for 2-PSI and 5-PSI corrugated stainless steel tubing (CSST) or black iron piping systems, effectively reducing inlet pressures to manageable appliance levels. The factory-installed 12A09 vent limiter (1/8" NPT) eliminates the need for external vent piping in indoor installations by limiting gas escapement in the event of a diaphragm rupture, provided the regulator is mounted in a horizontal, upright position. This regulator handles a maximum individual load of 100,000 BTU/hr and a combined multiple appliance load of up to 150,000 BTU/hr, making it a reliable solution for multi-appliance manifold configurations using natural gas or LP/propane.

• Indoor Versatility: The integrated 12A09 vent limiting device allows for indoor mounting without the labor-intensive requirement of running vent lines to the outdoors.
• Superior Lock-Up Performance: High-leverage valve linkage ensures consistent dead-end lock-up, preventing downstream pressure spikes when appliances are in standby mode.
• Multi-Fuel Compatibility: Certified for use with natural gas (up to 5 PSI inlet) and liquefied petroleum (LP) gases (up to 2 PSI inlet).
• Precision Control: The 4-12" w.c. outlet pressure range allows for fine-tuning gas delivery to meet specific manufacturer manifold requirements.
• Rugged Construction: Features corrosion-resistant internal components and a robust design capable of withstanding emergency exposure up to 65 PSI.

• Can this regulator be mounted vertically? To utilize the vent limiter safety feature, the regulator MUST be installed in a horizontal, upright position. Vertical mounting will cause the ball check to seat prematurely, leading to sluggish response or high lock-up pressure.
• Does this unit require an Overpressure Protection Device (OPD)? For natural gas installations exceeding 5 PSI or LP installations exceeding 2 PSI, a certified OPD is required to meet ANSI Z21.80/CSA 6.22 standards.
• What happens if the diaphragm ruptures? The 12A09 vent limiter acts as a safety check, restricting gas discharge to within ANSI/CSA mandated levels, preventing hazardous accumulation in the mechanical room.

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.