Maxitrol RV81-1 1/4 Regulator

The Maxitrol RV81-1 1/4 is a specialized appliance gas regulator engineered for high-capacity applications requiring precise pressure control at low inlet levels. Utilizing Maxitrol’s signature Straight-Thru-Flow (STF) design, this 1-1/4" NPT unit employs a unique conical valve that allows fuel to pass through without directional changes. This profile significantly reduces frictional resistance, enabling a massive 4,500,000 BTU/hr capacity while maintaining sensitivity even at extremely low pressure differentials. Built with a high-strength aluminum housing and a Teflon-coated conical valve, the RV81 is designed for long-term reliability in demanding environments.

This non-lockup regulator is CSA certified for 1/2 PSI max inlet pressure and has been Maxitrol tested for up to 1 PSI. It features a factory-standard 3-6" w.c. outlet pressure range, ideal for main burner only applications in commercial boilers, industrial furnaces, and large-scale cooking equipment. The RV81-1 1/4 is technically identical to the RV81-1 1/4-CSA, ensuring compliance with ANSI Z21.18 and CSA 6.3 standards. For proper operation, this unit must be installed in an upright position and is compatible with natural gas, LP, and mixed gas systems.

• Straight-Thru-Flow Design: Minimizes pressure drop and maximizes flow capacity through the conical poppet mechanism.
• High Volume Performance: Supports up to 2500 CFH (4.5M BTU) for heavy-duty commercial and industrial equipment.
• Precision Regulation: Delivers stable outlet pressure even when inlet pressures are as low as 3" w.c.
• Durable Construction: Features a corrosion-resistant aluminum body and synthetic rubber diaphragm for consistent response.
• Multi-Gas Compatibility: Suitable for natural, manufactured, mixed, liquefied petroleum gases, and LP gas-air mixtures.

• Can this be used as a line pressure regulator? No, the RV81 is a non-lockup appliance regulator intended for main burner loads only. It should not be used as a line regulator ahead of low-pressure controls.
• What is the proper mounting orientation? This specific model is recommended for upright, horizontal piping installations to ensure the most accurate outlet pressure settings.
• Is this regulator compatible with high-pressure systems? This unit is rated for a maximum inlet of 1 PSI. Exceeding 5 PSI (emergency exposure limit) may result in internal damage.

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.