Emerson B661413-P01 HFES 3 Hz Thermal Expansion Valve is a TXV used in HVAC/R refrigerant circuits to meter refrigerant into the evaporator. It modulates refrigerant flow based on evaporator superheat to help maintain proper metering and stable operating conditions. The part is identified by the B661413-P01 designation and is part of Emerson’s HFES 3 Hz valve family.
