Sensus 243-8-IRV-2 Regulator

The Sensus 243-8-IRV-2 is a robust, large-capacity industrial gas pressure regulator designed for commercial service, distribution work, and high-demand applications like boiler sets and furnace gas trains. Featuring a 2-inch NPT connection and a 3/8-inch orifice, this model is engineered for precision and field versatility. The Internal Relief Valve (IRV) provides critical overpressurization protection, while the Black 10 spring offers a stable outlet pressure range of 2 to 4.25 psi. Built with a durable cast iron body and a union connection, the 243-8-IRV-2 ensures easy inspection and interchangeability in diverse piping arrangements. Whether you are managing natural gas, propane vapor, or air, this commercial gas regulator maintains superior accuracy for fixed-factor billing and pressure-compensated metering. Its smart design allows for rapid adjustment and service, making it a reliable standard for veteran technicians across industrial sectors.

• Internal Relief Valve (IRV): Integrated safety mechanism provides essential overpressure protection without requiring additional external relief lines in many configurations.
• Interchangeable Design: The union connection between the body and diaphragm case allows for quick swapping of orifices and spring ranges to meet changing project specs.
• High Accuracy: Precise regulation makes this unit ideal for pressure factor measurement and fixed-factor billing applications.
• Rugged Construction: Built with a cast iron body (ASTM A126 Class B) to withstand the rigors of mechanical rooms and district regulator stations.
• Versatile Media Compatibility: Optimized for natural gas but performs consistently with LPG vapor, nitrogen, and dry CO2.

What is the maximum inlet pressure for the 243-8-IRV-2 with a 3/8" orifice?
With the 3/8-inch orifice installed, this model typically handles a maximum inlet pressure of up to 125 PSIG, though local codes and specific safety margins should always be verified against the manufacturer’s capacity tables.

Can this regulator be installed in any orientation?
Yes, the 243 series can be installed in horizontal, vertical, or diagonal positions. However, if installed indoors, ensure the 1-inch NPT vent is piped to a safe outdoor location per NFPA standards.

How do I change the outlet pressure if the current spring isn't sufficient?
The outlet pressure is determined by the internal spring. To adjust within the current 2 - 4.25 psi range, remove the seal cap and turn the adjustment screw. For ranges outside of this, you must swap the internal regulator spring for a different color-coded compatible version.

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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.