Maxitrol RV47L-1/2-412 Regulator

The Maxitrol RV47L-1/2-412 is a professional-grade appliance gas regulator engineered for high-accuracy pressure control in residential and light commercial HVACR applications. Built with 1/2" NPT connections, this straight-thru design supports a 1/2 PSI maximum inlet pressure, making it a standard choice for furnaces, boilers, and commercial cooking equipment. The unit is factory-calibrated for an adjustable outlet pressure range of 4-12" WC, providing the precise manifold pressure required for efficient combustion. A key technical advantage is the integral vent limiting orifice, which complies with safety standards for indoor installation without the need for external vent piping to the outdoors. The internal rubber seat poppet ensures a tight seal and consistent lock-up characteristics, maintaining stable performance across varying flow rates. Whether you are servicing a rooftop unit or a commercial range, this Maxitrol gas regulator provides the rugged reliability seasoned technicians expect for natural gas and LP applications.

Technical Benefits for Contractors

• Internal Vent Limiting Orifice: Simplifies indoor installations by eliminating the requirement for downstream vent lines in most applications.
• Precision Pressure Regulation: Maintains a steady 4-12" water column outlet, essential for preventing burner flame-outs and ensuring equipment efficiency.
• Durable Rubber Seat Poppet: Designed for superior sealing performance, reducing callbacks related to pressure fluctuations or leakage.
• High Flow Capacity: Straight-thru flow design minimizes pressure drop and accommodates the high BTU demands of modern gas-fired appliances.
• Multi-Fuel Compatibility: Suitable for use with natural, manufactured, mixed, liquefied petroleum, and LP gas-air mixtures.

Common Installation Questions

Does this regulator require an external vent line?
No, the RV47L-1/2-412 features an integral vent limiter. It is designed to vent safely into the combustion chamber or mechanical room per local codes, making it an ideal vent-limiting gas regulator for tight interior spaces.

Can I use this for high-pressure gas mains?
This model is rated for a maximum inlet pressure of 1/2 PSI (approx. 14" WC). If your line pressure exceeds this, you must install a primary reduction regulator upstream to avoid damaging the internal diaphragm.

Is the outlet pressure adjustable in the field?
Yes, while it comes with a 4-12" WC spring, the outlet pressure can be fine-tuned using the adjustment screw under the cap to match the specific manifold requirements of the appliance.

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.