Armstrong International C5490 Air Vent 30067439-890 Compatible with all Selectra Series

Compatible with all Selectra Series 14 modulation systems for seamless direct-fired heating control

persistent yellow tipping

the O16-557 offers high-amp rated switching and clear scale plates for rapid field calibration by qualified contractors

While cleaning with soft materials is sometimes possible

Armstrong International C5490 Air Vent 30067439-890 Compatible with all Selectra SeriesThe Armstrong International C5490 (functionally identical to the TAVB 2) is a high performance stainless steel thermostatic air vent and vacuum breaker designed to optimize steam system efficiency. Engineered for pressures up to 150 PSI, this dual function HVACR component features a 1 2" NPT air vent connection and a 3 8" NPT vacuum breaker inlet. By automatically discharging air and non condensable gases during start up and operation, it prevents