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

The Maxitrol 325-3L-3/8-12A09 is a field-proven lever acting line pressure regulator engineered for 2 PSI piping systems. As a veteran-grade gas pressure regulator, it features a high-leverage valve linkage assembly to provide reliable positive dead-end lock-up, ensuring tight shut-off and downstream protection when appliances are not in operation. This model is ANSI Z21.80/CSA 6.22 certified for residential, commercial, and industrial applications, handling a max individual load of 140,000 BTU/h and a multiple load capacity of 250,000 BTU/h. The 3/8" NPT unit comes factory-equipped with a 12A09 vent limiter, allowing for multi-positional indoor installation without the need for traditional vent piping to the outdoors. It maintains a stable 7-11" WC outlet pressure even during fluctuations, making it ideal for natural gas and propane equipment such as space heaters, water heaters, and commercial dryers. The dead-end lock-up capability is critical for preventing pressure creep in high-efficiency systems.

• Safe Indoor Venting: The included 12A09 vent limiter eliminates the labor-intensive requirement for external vent lines by limiting gas escapement to safe, code-compliant levels.
• Robust Construction: Built with a durable aluminum housing and high-leverage linkage for precise flow control from full load down to pilot flow.
• Versatile Compatibility: Designed for use with natural gas, LP gas, mixed gases, and liquid petroleum mixtures across various HVACR applications.
• Extreme Temperature Rating: Fully operational in ambient conditions ranging from -40°F to 205°F, suitable for demanding mechanical rooms.

Can I install this regulator in any orientation?
When using the 12A09 vent limiter, the regulator must be mounted in an upright horizontal position to comply with its safety certification and ensure the limiter operates correctly.

Does this unit require a separate overpressure protection device (OPD)?
The 325-3L is certified for 2 PSI inlet systems; however, for systems exceeding 2 PSI nominal pressure, local codes may require an OPD to meet the ANSI Z21.80 standard.

What is the purpose of dead-end lock-up?
Positive dead-end lock-up ensures that gas flow stops completely when the downstream appliance closes its valve, preventing pressure from equalizing between the 2 PSI supply and the low-pressure appliance manifold.

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.