The Heatcraft Refrigeration 29311828 Expansion Valve is an HVAC and refrigeration component designed to regulate refrigerant flow in compatible cooling systems. It works by controlling the amount of refrigerant entering the evaporator based on system demand, ensuring efficient heat absorption and consistent cooling performance. Commonly used in commercial refrigeration units, evaporat... https://www.partshnc.com/29311828-heatcraft-refrigeration-expansion-valve