The Sensus 143-82-021-01 Blue/Black Spring is a critical calibration component designed specifically for the Sensus 243-8 gas regulator. In the field, technicians rely on this spring to establish a precise outlet pressure range of 5" to 8.5" w.c. (Water Column). This replacement regulator spring is engineered to maintain consistent downstream pressure, ensuring the diaphragm-case assembly responds accurately to load fluctuations. Its blue-black color coding allows for rapid identification during service regulator maintenance or setpoint conversions. This spring is a direct-fit solution for Series 243-8, as well as 122-8 and 121-8 models, providing the reliable tension required for commercial gas pressure regulation in systems using natural gas, LPG vapor, or air. By utilizing this Sensus gas regulator part, contractors can achieve stable low-pressure settings essential for boilers, burners, and industrial HVAC appliances without the risk of setpoint drift over time. Key Benefits Precise Pressure Control: Optimized for an outlet range of 5" to 8.5" w.c., providing stable lock-up and consistent delivery pressures. Broad Compatibility: Engineered for seamless integration with Sensus 243-8, 121-8, and 122-8 regulators. Color-Coded Identification: The blue/black finish ensures error-free selection and installation in the field. Industrial Durability: Constructed to withstand the high-cycle demands of industrial gas distribution and HVAC mechanical rooms. Common Questions What is the specific pressure range for the Sensus 143-82-021-01? This spring is rated for a normal delivered pressure range of 5" to 8.5" inches water column. It is essential to verify your target setpoint falls within this band before installation. Can I use this spring in a Sensus 243-12 regulator? While many Sensus regulator springs share physical dimensions, this specific 143-82-021-01 part number is technically validated for the 243-8 series. For 243-12 models, consult the manufacturer's spring chart to ensure the spring rate matches the larger diaphragm area. How do I change the spring in the field? Ensure the regulator is isolated and the setpoint adjustment screw is fully backed off before removing the seal cap. Always re-verify the outlet pressure with a calibrated manometer after swapping springs. 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.
