Sensus 143-16-021-06 Orange Spring

The Sensus 143-16-021-06 Orange Spring is a critical calibration component for field technicians servicing Sensus gas pressure regulators. This performance-grade spring is specifically engineered to maintain precise outlet pressure control in high-demand residential and commercial environments. When installed in the Sensus 243-12, 122-12, or 121-12 series, it provides a stable orange spring outlet range of 12–28" WC. For higher pressure requirements in the Sensus 243-8, 121-8, and 122-8 regulators, it delivers an accurate gas pressure regulation range of 1–2 PSIG.

Constructed to rigorous OEM specifications, this regulator replacement spring ensures consistent seat-to-orifice alignment, mitigating issues like pressure droop or hunting under load. Its durable construction is designed for long-term stability in extreme temperature ranges from -20°F to +150°F. As a genuine Sensus part, it guarantees a seamless fit during regulator maintenance, maintaining the integrity of the diaphragm assembly and relief valve settings without the need for custom fabrication or field modifications.

• Precise Pressure Response: Designed for industrial combustion regulators to provide fast response times during snap-acting load changes.
• Multi-Model Compatibility: Engineered for use across the Sensus 243, 122, and 121 series, reducing truck stock requirements for contractors.
• Dual-Range Performance: Supports both inches water column and PSIG ranges depending on the specific regulator case size (8-inch vs. 12-inch).
• Sensus OEM Quality: Eliminates compatibility risks associated with aftermarket springs, ensuring correct spring rate and tension.
• High-Grade Steel: Built to withstand the mechanical stress of continuous modulation in natural gas and propane systems.

How do I identify if this is the correct spring for my regulator?
The 143-16-021-06 is color-coded orange. You should verify your regulator's model number and desired outlet range; this spring is specifically for 12–28" WC or 1–2 PSIG applications depending on the diaphragm case diameter.

Can this spring be used with propane?
Yes, this Sensus orange spring is compatible with natural gas, propane (LPG), air, and nitrogen when used in a compatible Sensus regulator body with appropriate trim.

Does a weak spring cause low downstream pressure?
Yes. In the field, a weak or incorrectly rated spring often results in low downstream pressure under load because it lacks the force to push the valve open against inlet pressure. Routine replacement during gas regulator service prevents these delivery failures.

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.