and NS301 series

though it can be replaced by a 440V equivalent if necessary

000 hours of operational life within a temperature range of -40°C to +70°C

Key Benefits Precise Compatibility: Engineered as a drop-in replacement for Barber Colman AT-11-399 and AT-24-399

the 305931 provides the real-time temperature data required to verify system setpoints and ensure peak efficiency

McDonnell & Miller 250-3/4-15 Valve Els PW 17895 and NS301 seriesThe 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