The enlargement valve holds back again the refrigerant and maintains the superior stress with the condenser. Inside the growth valve, a little orifice allows a restricted volume of refrigerant to carry on to movement. Since it flows via this restriction it reaches the lower tension side on the valve. In https://www.penmann.co.uk/penmann-delivers-permanent-glycol-chiller-solution-for-ambrosia-creamery-in-lifton/