The Sensus 143-08-021-03 Spring is a critical calibration component designed for Model 143-80 services regulators and Model 243-8 pilot operated regulators. Engineered for precision pressure control, this orange-coded spring establishes a set point range of 12" to 28" WC (water column), making it ideal for commercial gas regulation where elevated delivery pressures are required. Field technicians utilize this spring to ensure stable downstream pressure despite fluctuating inlet conditions. Constructed from high-tensile spring steel, the 143-08-021-03 maintains its rate integrity under continuous load, preventing set point drift. Whether performing a regulator spring replacement or a custom load-out for a meter set, this component ensures the diaphragm assembly reacts accurately to gas demand. Proper installation within the spring tower is vital for achieving the desired gas pressure regulator adjustment without binding or mechanical interference, ensuring reliable performance in demanding BTU load environments. Technical Key Benefits: Broad Adjustment Range: Provides a 12" to 28" WC window, bridging the gap between standard low-pressure and high-pressure commercial requirements. Standardized Color Coding: The orange finish ensures rapid identification during field service, reducing the risk of installing the incorrect Sensus 143-80 spring. Mechanical Stability: Optimized spring rate minimizes regulator droop and improves recovery speed during rapid solenoid valve cycling. Direct OEM Compatibility: Designed specifically for Sensus 143 and 243 series platforms, ensuring perfect fitment within the adjustment screw assembly. Common Service Questions: What is the relief capacity when using the orange spring? Internal relief capacity depends on the specific orifice size and regulator body used; however, this spring allows the regulator to maintain set points higher than standard green or silver springs typically used in residential applications. Can this spring be used in 2" NPT Sensus 243 regulators? Yes, the 143-08-021-03 is listed for use in 143-80, 143-80-1, and 243-8 models, provided the regulator is configured for the 12" to 28" WC range. How do I identify this spring if the color has faded? Technicians should verify the wire diameter and coil count against the Sensus regulator spring chart to confirm the 143-08-021-03 specifications before installation. 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.
