Sensus 121-8-1 1/4 Regulator

The Sensus 121-8-1-1/4 gas regulator is a heavy-duty industrial regulator designed for high-capacity applications requiring precise pressure control. Engineered for natural gas service and industrial combustion systems, this 1-1/4 inch NPT regulator features a 1.5-12 inch W.C. spring to ensure stable downstream pressure. The Model 121-8 is frequently utilized in commercial boilers and furnaces where rapid response to flow changes is critical. Its diaphragm casing design allows for exceptional sensitivity and high-volume delivery without significant droop. This Sensus gas pressure regulator provides reliable lock-up characteristics and is suitable for industrial gas regulation involving air, CO2, and propane. Contractors rely on the Sensus 121-8 performance for its rugged construction and ease of maintenance in the field, making it a standard choice for HVAC gas piping systems requiring consistent manifold pressure management.

• Large Diaphragm Area: Provides high sensitivity and accurate pressure regulation even at low inlet pressures.
• Versatile Mounting: Can be installed in various positions to accommodate tight mechanical room piping.
• Internal Sensing: Simplifies installation by eliminating the need for external control lines in standard setups.
• Interchangeable Springs: Allows for field adjustments and customization to meet specific outlet pressure requirements.

Common Questions

What is the maximum inlet pressure for the Sensus 121-8?
The Sensus 121-8 is typically rated for a maximum inlet pressure of 60 psi, though specific orifice sizes and application requirements must be verified against manufacturer flow tables.

Can this regulator be used for propane service?
Yes, the 121-8 series is compatible with propane, but orifice sizing and spring selection should be calculated based on the specific gravity of the gas.

How do I adjust the outlet pressure on this model?
Pressure adjustments are made by removing the top cap and turning the adjustment screw to compress or decompress the 1.5-12" W.C. spring.

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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.