Sensus 243-8-IRV-1 1/2 Regulator

The Sensus 243-8-IRV-1 1/2 Gas Regulator is a high-capacity, heavy-duty solution designed specifically for commercial and industrial gas distribution monitoring. Built with a 1.5-inch NPT body and a 1/2-inch 10-degree orifice, this regulator is engineered for precise pressure reduction in high-load environments such as large boiler rooms, furnaces, and commercial laundries. The internal relief valve (IRV) provide an essential layer of overpressurization protection, while the green and black spring allows for a field-adjustable outlet pressure range of 6 to 14 inches W.C., making it a staple for contractors handling medium to large service applications.

Constructed with a cast iron body (ASTM A126 Class B) and a die-cast aluminum alloy diaphragm case, this unit offers exceptional durability against the mechanical stresses of high-flow systems. The union connection between the body and the diaphragm case facilitates rapid field servicing, inspections, and orifice swaps without disconnecting the main piping. Optimized for natural gas and propane (LPG), the 243-8-IRV provides a positive dead-end lockup and consistent low-pressure gas regulation across a wide temperature spectrum from -20°F to 150°F.

Key Benefits for Professionals

• Internal Relief Protection: The integrated Sensus IRV reduces the need for external relief piping in specific installations, streamlining system architecture.
• Field Serviceability: Features a 4-bolt union connection that allows the diaphragm case to be removed/rotated easily, a critical factor for tight mechanical room footprints.
• Large Capacity Flow Control: Effectively manages gas loads for commercial burners and industrial heaters with a maximum inlet pressure of up to 80 PSIG (orifice dependent).
• Corrosion Resistance: Finished with a rugged green and black epoxy coating to withstand harsh boiler room environments.
• Dead-End Lockup: Ensures safety and system stability when downstream demand ceases unexpectedly.

Common Questions

What gases is this regulator compatible with?
While primarily used for natural gas service, the 243-8-IRV-1 1/2 is also rated for LPG vapor, air, dry CO2, nitrogen, and other inert gases.

Can the outlet pressure be adjusted?
Yes, the installed 6-14" W.C. spring (Green/Black) is fully adjustable within that range. For pressures outside this window, compatible Sensus springs are available for field replacement.

Where should the vent be positioned?
The 1-inch NPT screened vent should be positioned to prevent moisture, ice, or insect debris from obstructing the internal relief valve discharge, especially in outdoor installations.

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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.