McDonnell & Miller 250-3/4-50 Valve 30067439-890 provided the system parameters do

provided the system parameters do not exceed the specified thermal limits of the EPDM seals

the AT-602 subbase ensures secure electrical pathways for room thermostats and building automation systems

This direct-acting valve is a critical component for gas pilot control and main line shut-off applications where consistent opening and closing cycles are required

Corrosion-resistant galvanized steel ensures longevity in high-humidity return air environments

Ensures precise airflow regulation for optimized combustion efficiency in UDAP/UDAS models

McDonnell & Miller 250-3/4-50 Valve 30067439-890 provided the system parameters doThe McDonnell & Miller 250 3 4 50 (Part Number 181525) is a high capacity pressure relief valve engineered specifically for technical boiler applications and hydronic heating systems. Field proven to handle a 1,160,000 BTU capacity, this 3 4" NPT valve is set at a precise 50 PSI to prevent over pressure conditions in demanding mechanical environments. Built with a heavy duty bronze body and seat, it utilizes an EPDM rubber diaphragm and seat disc to