Sensus 143-IRV-3/4 Regulator

The Sensus 143-IRV-3/4 Regulator is a job-site standard for technicians requiring a mid-capacity gas pressure regulator with internal relief valve. Engineered for residential service and light commercial applications, this 143-80 series model features a 3/4" NPT connection and a 3/8" precision-machined orifice to provide stable delivery pressures. Configured with a green loading spring, it maintains a consistent outlet pressure range of 6 to 14 inches Water Column, making it a drop-in solution for natural gas and propane (LP) vapor systems. The cast iron body and aluminum diaphragm case include a chromate conversion coating and enamel topcoat to stand up to outdoor environmental stress. For overpressure protection, the internal relief valve (IRV) is factory-set to vent approximately 7" to 10" W.C. above the normal set point, ensuring downstream equipment remains within safe operating limits without requiring external relief piping in most standard configurations.

• Internal Relief Valve (IRV): Provides integrated overpressure protection to prevent downstream damage during seat failure.
• Precision Control: Utilizes a 3/8" orifice for accurate modulation in low-pressure distribution systems.
• Versatile Media: Compatible with natural gas, propane vapor, air, nitrogen, and other non-corrosive technical gases.
• Field-Serviceable Design: Features a union nut connection for rapid inspection of the valve seat and diaphragm without specialized tools.
• Rugged Construction: Built with a cast iron valve body and die-cast aluminum spring case for industrial-grade durability.

• What is the maximum inlet pressure for this configuration? This unit is rated for a maximum inlet pressure of 40 PSIG when equipped with the 3/8" orifice and green spring.
• Can this regulator be used for high-pressure propane piping? While compatible with propane vapor, it is designed for low-pressure 6-14" W.C. outlet requirements; always verify the downstream appliance requirements before installation.
• Does this model require a specific mounting orientation? The Sensus 143 series supports multi-position mounting, though it is standard practice to orient the vent to prevent moisture or debris accumulation.

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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.