The Hoshizaki 4A4597-01 Refrigerator Expansion Valve is controls the amount of refrigerant that flows into the evaporator to ensure that the appliance operates provides in terms of cooling. It works by changing the pressure and volume of the refrigerant depending on the change in temperature so that the heat exchange is effective. The valve is connected to the evaporator, it operates ... https://partsfe.com/4a4597-01-hoshizaki-valve-expansion