Description
The Nordyne 664346R Thermal Expansion Valve is a refrigerant metering part used in cooling systems to regulate flow into the evaporator coil in 4-ton capacity equipment designed for R410A refrigerant. It maintains correct superheat by adjusting refrigerant delivery based on load conditions helping prevent liquid refrigerant from returning to the compressor and supporting stable operation. Installed in split or packaged cooling units it is positioned between the liquid line and evaporator assembly. This component plays a key role in balancing pressure, improving efficiency, and ensuring consistent temperature control in residential and light commercial systems.
