McDonnell & Miller 250-3/4-15 Valve 30067439-890 Dual-Voltage Efficiency: Pre-wired for 120V

Dual-Voltage Efficiency: Pre-wired for 120V primary input and 24V secondary output

Frequent tripping usually indicates restricted return air

making it a versatile solution for field conversions or standard repairs

As a standard in HVAC mechanical linkage parts

McDonnell & Miller 250-3/4-15 Valve 30067439-890 Dual-Voltage Efficiency: Pre-wired for 120VThe McDonnell & Miller 250 3 4 15 is a high performance 3 4" NPT Pressure Relief Valve engineered for critical over pressure protection in hydronic heating systems and storage tanks. Featuring a robust bronze body and seat, this valve is factory set at 15 PSI with a substantial thermal discharge capacity of 515,000 BTU hr. Designed to meet ASME Section IV code requirements for heating boilers, it utilizes an EPDM rubber diaphragm and seat disc to