Sensus 243-12-IRV-1 1/4 Regulator

For veteran HVACR contractors managing industrial meter sets or commercial boiler rooms, the Sensus 243-12-IRV-1 1/4 Regulator—now under the Utility Solutions Group (USG) brand—delivers the high-capacity precision required for demanding distribution tasks. This large capacity service regulator features a 1.25-inch NPT cast iron body and a 3/4-inch 10-degree orifice, engineered for a natural gas and propane delivery performance with exceptional dead-end lockup. Equipped with a green spring, it provides an adjustable outlet pressure range of 6 to 14 inches w.c. and is functionally identical to the 243-12-2-1 1/4 model, often seen in residential apartment complexes and hospitals. The integrated internal relief valve (IRV) offers critical overpressure protection, while the union connection between the body and the 12-inch diaphragm case allows for field-versatile mounting in any configuration. This Sensus commercial gas regulator is ideal for fixed-factor billing and pressure-compensated metering where droop must be minimized at high flow rates.

Key Benefits for Contractors

• Large Capacity Performance: Specifically designed for commercial industrial gas applications like boilers, furnaces, and large-scale ovens.
• Field Serviceability: The union nut connection facilitates easy inspection and orifice swaps without removing the body from the piping.
• Internal Relief Protection: The internal relief valve (IRV) provides a safety margin by venting excess gas during overpressure events.
• Versatile Compatibility: While optimized for natural gas, it performs reliably with LPG vapor, air, dry CO2, and nitrogen.
• Dead-End Lockup: Ensures a positive seal and prevents pressure buildup downstream when the burner is inactive.

Common Questions

What is the maximum inlet pressure for this configuration?
With a 3/4-inch orifice, the 243-12-IRV typically handles a maximum inlet pressure of up to 60 PSIG, though technicians should always consult the specific capacity chart for your application's required flow and droop allowance.

Can I use this regulator for propane applications?
Yes, this 1.25 inch NPT regulator is fully compatible with LPG vapor and other non-corrosive gases, making it a staple for large-scale propane delivery systems.

How do I adjust the delivery pressure?
The outlet pressure range of 6-14" w.c. is set via the green spring. Adjustments are made by rotating the adjustment screw under the vented cap to meet the specific manifold requirements of your equipment.

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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.