Sensus 143-16-021-04 Blue Spring

The Sensus 143-16-021-04 Blue Spring is a critical calibration component engineered specifically for Sensus 243-12 and 121-12 gas pressure regulators. Designed for high-precision pressure management, this heavy-duty spring provides an outlet pressure range of 5" to 8.5" w.c. (water column), ensuring consistent delivery and stable downstream pressure in industrial and commercial natural gas applications. As a veteran-grade gas regulator replacement spring, it is optimized simple installation and accurate set-point retention, common for field-service technicians maintaining commercial gas meter accuracy.

For contractors servicing Sensus regulator models, the 143-16-021-04 is a necessary upgrade or replacement when the required delivery pressure exceeds standard domestic ranges but remains within the medium-pressure band. Utilizing Sensus genuine parts like this blue-coded spring prevents mechanical drifting and ensures that the diaphragm responds with the correct force-balance ratio. This item is the industry standard for pressure control springs in the 243 and 121 series, providing the industrial-grade durability needed for uninterrupted service in demanding HVACR environments.

• Specifically calibrated for Sensus 243-12 and 121-12 series regulators.
• Provides a reliable 5" to 8.5" w.c. outlet range for medium-pressure requirements.
• Color-coded Blue Spring for rapid field identification and error-free compatibility.
• Maintains long-term set-point stability to prevent downstream equipment damage.
• Engineered for industrial-grade durability in commercial natural gas metering.

What is the pressure range for the 143-16-021-04?
This blue spring is rated for 5" to 8.5" of water column (w.c.) when installed in compatible Sensus regulator bodies.

Is this spring compatible with the Sensus 243-8 model?
No, this specific part number is designed for the larger 243-12 and 121-12 series. For the 243-8, you should look for the corresponding 143-82 series springs.

Will this spring fit other regulator brands?
This is an OEM part designed specifically for Sensus (formerly Rockwell/Equimeter) internal spring housings; mixing brands can lead to improper calibration or failure.

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.