The growth valve retains again the refrigerant and maintains the high stress on the condenser. In the enlargement valve, a small orifice makes it possible for a limited amount of refrigerant to continue to circulation. Since it flows through this restriction it reaches the reduced stress aspect on the valve. https://www.penmann.co.uk/penmann-delivers-permanent-glycol-chiller-solution-for-ambrosia-creamery-in-lifton/