Sensus 243-8-IRV-1 1/4 Regulator

The Sensus 243-8-IRV-1 1/4 is a heavy-duty commercial gas regulator engineered for precision in large-scale residential and light industrial gas distribution. This specific configuration features a 1-1/4" NPT inlet and a 1/2" orifice, optimized for high-capacity flow without sacrificing sensitivity. Part of the proven 243 series, the 243-8-IRV model includes an internal relief valve (IRV), providing essential overpressure protection for downstream equipment. This unit is technically identical to the 243-8-2-1 1/4, ensuring drop-in compatibility for existing service sets. Equipped with a green-black spring, it maintains a stable outlet pressure range of 6" to 14" W.C. even under fluctuating 40 PSIG maximum inlet pressure. Designed for field durability, the cast iron pipe connection and rugged diaphragm case allow for operation in extreme temperatures ranging from -20°F to 150°F, making it a standard choice for natural gas pressure regulation in demanding environments.

Technical Benefits:

• Internal Relief Valve (IRV): Simplifies installation by reducing the need for external relief piping while maintaining system safety.
• High Torque Large Diaphragm: Provides superior sensitivity and fast response to load changes in commercial gas meter applications.
• Interchangeable Orifices: The 1/2" orifice can be serviced or swapped to match specific flow capacity requirements.
• Union Nut Connection: Features a 360-degree diaphragm case rotation, allowing for flexible positioning in tight mechanical rooms or outdoor sets.
• Interchangeable Parts: High degree of parts commonality with the Sensus 243-8-2 series for streamlined maintenance.

Common Contractor Questions:

Is the 243-8-IRV compatible with LP gas?
Yes, while commonly used for natural gas, this regulator is compatible with LP vapor, though flow capacities will differ based on the specific gravity of the gas.

What is the difference between the 243-8-IRV and the 243-8-2?
The 243-8-IRV-1 1/4 is functionally identical to the 243-8-2; both include the internal relief valve feature, though model designations may vary by regional distributor catalogs.

Can I install this regulator in a vertical orientation?
Yes, the Sensus 243-8-IRV can be mounted in any position as long as the vent is protected from moisture and debris, and the internal relief spring is calibrated for the specific orientation if required by local codes.

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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.