The growth valve retains again the refrigerant and maintains the high stress on the condenser. In the enlargement valve, a small orifice allows a restricted volume of refrigerant to carry on to move. As it flows by means of this restriction it reaches the lower tension aspect of your valve. https://www.penmann.co.uk/penmann-delivers-permanent-glycol-chiller-solution-for-ambrosia-creamery-in-lifton/