Sensus 143-80-6-1 Regulator

The Sensus 143-80-6-1 Regulator is a specialized domestic service regulator engineered for technicians requiring integrated safety features in natural gas and propane systems. This low-pressure cut-off (LPCO) regulator provides a critical mechanical shutdown layer, automatically halting gas flow if the downstream pressure drops below a safe threshold, a vital requirement in many jurisdictional safety codes. Built with a rugged cast iron valve body and die-cast aluminum spring cases, it is designed to withstand 125 psig working pressures while maintaining precise control.

Equipped with a 5/16" aluminum orifice and a factory-standard green spring, this model is calibrated for an outlet pressure range of 7.5 to 15" WC. The 143-80-6 series is highly favored by contractors for its union nut connection, which allows for a full 360-degree rotation of the diaphragm case, simplifying installation in tight boiler rooms or industrial manifold configurations. The Nylon fabric-reinforced Buna-N diaphragm provides 26 square inches of effective area for consistent response across fluctuating inlet pressures up to 40 psig for this specific orifice size.

Key Benefits for Contractors:

• Fail-Safe Operation: The LPCO (Low Pressure Cut-Off) mechanism offers an essential safety barrier for residential and light commercial equipment.
• Field Versatility: Suitable for multi-gas applications including nitrogen, dry CO2, air, and LPG.
• Corrosion Resistance: Cases are dip-primed with a chromate conversion coating and finished with an enamel topcoat for outdoor durability.
• Ease of Service: The internal relief valve (IRV) is set to trigger at 7-10" WC over the set point, protected by a 1" NPT screened vent.
• Proven Temperature Rating: Stable performance across a broad range from -20°F to 150°F.

Common Technical Questions:

How do I reset the LPCO after a pressure loss event?
To initiate flow, technicians must remove the cap and manually pull the reset pin located inside the spring housing post-repair to de-activate the cut-off device.

What is the maximum inlet pressure for the 5/16" orifice?
For the 5/16" orifice size, the recommended maximum inlet pressure is 40 psig to maintain optimal regulation performance.

Can this regulator be used for high-temperature boiler applications?
Yes, it is rated for equipment like unit heaters, boilers, and furnaces, provided the ambient and flowing temperatures remain within the -20° to 150°F limit.

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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.