Expansion Valve

Definition

An air conditioner’s expansion valve controls how much refrigerant is allowed to flow from the condenser coil into the evaporator coil. By doing so, it helps the evaporator coil to work more efficiently, allowing enough refrigerant into the evaporator coil so that it’s chilled to the proper temperature. And, by preventing refrigerant from entering the evaporator coil once it’s properly chilled, the expansion valve keeps liquid refrigerant from flowing to the compressor.

Synonyms

Thermal Expansion Valve, Thermostatic Expansion Valve, TX Valve, Metering Device

Abbreviations