The expansion valve retains back the refrigerant and maintains the large tension of the condenser. In the growth valve, a small orifice allows a restricted level of refrigerant to continue to movement. Because it flows by way of this restriction it reaches the small strain aspect on the valve. On https://www.penmann.co.uk/penmann-delivers-permanent-glycol-chiller-solution-for-ambrosia-creamery-in-lifton/