The expansion valve retains again the refrigerant and maintains the higher force from the condenser. Within the enlargement valve, a little orifice allows a restricted degree of refrigerant to continue to circulation. As it flows through this restriction it reaches the lower tension side on the valve. Microsoft and DuckDuckGo https://www.penmann.co.uk/penmann-delivers-permanent-glycol-chiller-solution-for-ambrosia-creamery-in-lifton/