Sensus 243-12-1 1/4 Regulator

The Sensus 243-12-1 1/4 Regulator (equivalent to model 243-12-1-1 1/4) is a high-capacity natural gas service regulator engineered for commercial and industrial applications requiring precise pressure control. Featuring a 1-1/4" NPT connection and a 3/4" orifice, this unit is designed to handle significant flow rates while maintaining a steady downstream pressure. The internal 6" to 14" w.c. outlet pressure range is established by the green spring, making it ideal for large meter sets and fixed-factor billing installations. Its large diaphragm area provides superior sensitivity to load changes, preventing "hunting" or rapid cycling. Field technicians value the 243 series for its modular construction, allowing for 360-degree diaphragm rotation to simplify piping in tight mechanical rooms. When sizing this gas pressure regulator, ensure the inlet pressure and specific gravity of the media align with the Sensus 243-12 performance curves to prevent sonic flow issues or premature seat wear.

• Interchangeable Orifice Sizes: Supports 3/4" orifice for high-volume delivery across variable inlet pressures.
• Internal Relief Valve: Provides overpressure protection and simplifies regulator installation by reducing external piping requirements.
• Robust Construction: Cast iron body and aluminum diaphragm case ensure durability in outdoor or harsh environment applications.
• Spring Flexibility: The green adjustment spring allows for precise tuning between 6" and 14" w.c..

What is the maximum inlet pressure for the Sensus 243-12?
The Sensus 243-12 regulator is typically rated for a maximum inlet pressure of 125 psi, though actual performance is restricted by the specific 3/4" orifice capacity and the desired outlet pressure setpoint.

Can this regulator be used for propane (LPG) service?
Yes, the 243-12 series is compatible with natural gas and propane applications, provided the service technician applies the correct conversion factor to the flow (SCFH) based on the specific gravity of the gas.

Is the 243-12-1 1/4 the same as the 243-12-1-1 1/4?
Yes, these model numbers represent the same 1.25" NPT gas regulator technical specifications and are functionally identical for field replacement.

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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.