Emerson Flow Control (Alco) 057291 Thermal Expansion Valve 3/8" X 1/2" Sweat 5' Capillary

The Emerson Flow Control (Alco) 057291 Thermal Expansion Valve is a metering component used to control the flow of liquid refrigerant into the evaporation coil in HVAC systems. It is attached by a 5' capillary tube to the evaporator outlet, measures the conditions, and opens an internal valve to regulate the flow of refrigerant. The valve has 3/8" by 1/ 2" sweat connections that connect, to the liquid line and evaporator inlet of the refrigerant circuit. It is placed in the refrigeration pathway to regulate refrigerant flow, to ensure constant superheat levels.