The constant flow water chillers series CWC they serve to cool the water destined to the creation of mixtures for food products such as bread, pasta, etc. They represent the most high guarantee of hygiene cooling because the water that will be used for food production does not come into contact and never stops inside the cooling tank cause passes inside the tubular stainless exchanger which in turn and ‘immersed in a bath full of water cooled by a coil, said evaporator, also made of stainless steel, inside which passes the Freon gas. In this way there is a guarantee that even in the event of breakage of the evaporator tube does not pollute the water to be used for the production, also there will be no problems of deposit on the bottom of the tank or stagnation due to periods of inactivity of the machine.