Sensus 143-16-021-04 Blue Spring sensing the pilot flame's heat

sensing the pilot flame's heat and producing the necessary voltage to keep the gas valve solenoid energized

and venter seal gaskets must be sourced separately if they are not being reused

Universal Input Compatibility: Operates on 10-30 Vac/dc or 120 Vac

always verify line voltage at the light to confirm the issue isn't a tripped high-limit or blown fuse elsewhere in the circuit

and R8404 primary controls

Sensus 143-16-021-04 Blue Spring sensing the pilot flame's heatThe 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