Maxitrol 325-5-1/2 Regulator

The Maxitrol 325-5-1/2 Regulator is a specialized lever-acting gas pressure regulator engineered for residential, commercial, and light industrial applications. This 1/2" NPT gas regulator is specifically designed for pounds-to-inches reduction, managing a 10 PSI max inlet pressure while delivering a precise 4-12" wc outlet pressure. Featuring a robust positive dead-end lock-up design, it prevents pressure equalization during downstream shutdown, protecting sensitive appliance components. With a substantial 325,000 BTU/hr max capacity, this unit facilitates reliable gas pressure regulation for high-demand equipment like boilers and furnaces. It is uniquely capable of maintaining accurate control from full flow down to pilot flow applications, ensuring operational stability across varying loads. Built with a high-leverage valve linkage and a durable die-cast aluminum housing, this lock-up gas regulator is compatible with natural, manufactured, and LP gas systems. For indoor installations without a vent line, ensure a factory-certified vent limiting device is utilized to meet local safety codes.

Key Benefits for Contractors:

• Precision Control: High-leverage valve linkage ensures stable regulation from maximum individual loads down to tiny pilot flows.
• System Protection: Positive dead-end lock-up prevents downstream over-pressure when appliances are not in operation.
• Versatile Compatibility: Rated for use with natural gas, LP, and mixed gas service in 1/2-inch piping systems.
• Rugged Construction: Corrosion-resistant aluminum housing and nitrile rubber valve seats provide long-term reliability in modern HVACR environments.
• Flexible Installation: Multi-poise mounting capabilities simplify integration into existing gas train configurations.

Common Technical Questions:

Can the Maxitrol 325-5-1/2 be installed indoors without a vent line?
Yes, if equipped with a Maxitrol vent limiter (such as the 12A39), the regulator can be installed in indoor piping systems without a vent line to the atmosphere, provided it is mounted in the upright position per manufacturer specs.

Is this regulator suitable for 2 PSI piping systems?
While the 325-5 standard series is tested for up to 10 PSI, it is frequently used in 2 PSIG systems as a line pressure regulator to reduce pressure to appliance-compatible levels (inches of water column).

How does the lock-up feature benefit the gas train?
The positive dead-end lock-up ensures that when the downstream solenoid valve closes, the regulator shuts off completely, stopping the inlet pressure from "creeping" into the 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.