this part may be listed as replaces York 800042

and NS301 series

check your damper's torque requirements for high-pressure applications

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

The C3 radial internal clearance is specifically designed to accommodate thermal expansion in high-temperature environments

McDonnell & Miller 250-3/4-15 Valve Els PW 17895 this part may be listedThe 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