The expansion valve retains back again the refrigerant and maintains the higher stress of the condenser. Within the growth valve, a little orifice lets a restricted number of refrigerant to continue to movement. Since it flows by means of this restriction it reaches the small pressure aspect in the valve. https://www.penmann.co.uk/penmann-delivers-permanent-glycol-chiller-solution-for-ambrosia-creamery-in-lifton/