Sensus 243-12-IRV-1 1/2 Regulator

The Sensus 243-12-IRV-1 1/2 is a robust commercial gas regulator designed for high-capacity service with a focus on precision and safety. This Internal Relief Valve (IRV) model features a 1.5" NPT inlet and 3/4" NPT outlet, specifically configured with a 6/14" Green Orifice. It is technically identical to the Sensus 243-12-2-1 1/2, providing field-proven reliability for natural gas pressure regulation in large residential complexes and light industrial installations. The 243-12 series is engineered to handle rapid load changes and maintains a tight lock-up, preventing downstream overpressure. Utilizing a large diaphragm gas regulator design, it offers superior sensitivity and stable outlet pressure even when inlet pressures fluctuate. For contractors requiring a low-pressure gas regulator that can handle high flow rates without sacrificing accuracy, this unit provides the necessary mechanical integrity and performance standards expected from Sensus Gas Division equipment.

Key Technical Benefits

• Internal Relief Protection: The IRV mechanism provides essential overpressure protection, venting excess pressure safely through the stack.
• Interchangeable Orifices: The 6/14" orifice is optimized for specific flow coefficients, allowing for precise capacity matching in the field.
• High Flow Stability: Designed to minimize "hunting" and vibration, ensuring a steady supply to boilers, furnaces, and commercial water heaters.
• Heavy-Duty Construction: The cast iron body and rugged internal components are built to withstand harsh environmental conditions and mechanical stress.
• Standardized Footprint: Direct replacement compatibility with the 243-12-2 model ensures seamless integration into existing gas trains.

Common Questions

Is the 243-12-IRV-1 1/2 suitable for propane service?
While primarily used for natural gas regulation, this model can be converted for LP service with the appropriate spring and orifice adjustments. Always verify specific gravity and BTU requirements before installation.

What is the purpose of the Internal Relief Valve (IRV)?
The Internal Relief Valve acts as a safety secondary by relieving pressure into the vent line if the main valve fails to shut off tightly, preventing downstream damage.

How do I identify the spring range on this regulator?
Pressure ranges are determined by the internal spring color. This unit is part of the 243-12 family, which supports various gas regulator spring ranges to meet specific outlet pressure requirements from inches of water column to PSI.

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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.