Sensus 121-12-2 1/2 Regulator

The Sensus 121-12-2 1/2 Regulator is an industrial-grade gas pressure regulator designed for high-capacity applications requiring precise control and rapid response. Built with a 2 1/2" NPT cast iron body and a die-cast diaphragm case, this 121 SERIES regulator is engineered for durability in commercial burners, industrial boilers, and gas engines. This specific configuration features a green spring with an outlet pressure range of 6" to 14" w.c., making it ideal for low-pressure gas systems using natural gas, LP propane, or air. Its contemporary design leverages external sensing to maintain stable delivery pressures even under varying inlet conditions. Capable of handling a maximum inlet pressure of up to 60 PSIG, the 121-12 offers a superior combination of flow capacity and fast-acting lever response. Whether used for primary pressure reduction or as a monitoring regulator, this unit ensures positive dead-end lockup and can be adapted for zero governor or differential service to meet specific mechanical room requirements.

• High Flow Capacity: Optimized internal geometry allows for maximum SCFH natural gas delivery with minimal pressure droop.
• Versatile Application: Suitable for a wide range of non-corrosive gases including natural gas, LP propane, nitrogen, and CO2.
• Technical Precision: Features a machined "knife edge" orifice and soft-seat valve for tight shutoff and improved accuracy.
• Industrial Construction: Rugged cast iron body and corrosion-resistant components designed for vault or above-ground installations.
• Fast Response: Lever-action design provides immediate reaction to downstream demand changes, critical for high-modulation boilers and burners.

What is the maximum inlet pressure for the Sensus 121-12 model?
Standard models are rated for a maximum inlet pressure of 60 PSIG; however, capacity is dependent on the specific orifice size and required outlet set-point.

Should I increase the outlet piping size on this 2 1/2" regulator?
Yes, for high-capacity runs with higher inlet pressures, it is a standard practice to increase the pipe size immediately downstream of the regulator outlet to prevent velocity-related issues.

Can this unit be used for external sensing?
Yes, the Sensus 121-12 typically utilizes an external control line (sensing line) to provide the most accurate pressure regulation at the point of consumption.

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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.