Nordyne 904780 Heat Exchanger 319825-402 Steam applications require ASME Section

Steam applications require ASME Section V safety valves specifically rated for vapor service

As a direct replacement for legacy Barber Colman R504-2 models

check for 24V at the heater coils

Durable Construction: Engineered to withstand the thermal cycling typical of high-recovery commercial and residential units

The valve features a 2-inch female NPT inlet and an expanded 2-1/2 inch female NPT outlet to facilitate rapid pressure drops during relief events

Nordyne 904780 Heat Exchanger 319825-402 Steam applications require ASME SectionFor contractors servicing Nordyne, Intertherm, or Miller furnaces, the Nordyne 904780 Heat Exchanger is an essential primary component for restoring combustion efficiency and system safety. This OEM Nordyne furnace part is engineered for high performance heat transfer, effectively drawing energy from combustion gases into the residential air stream. Constructed from heavy duty aluminized steel, the replacement heat exchanger provides the thermal