Tank made in compliance with recent European standards to preserve milk in a homogeneous way avoiding that the fat part separates from the rest of the mixture. The inner tank is made entirely of AISI 304 20/10 stainless steel and a total drain of DN50 stainless steel. A watertight electrical panel is mounted on the machine, containing a start-stop switch, an electronic thermostat with temperature display and a built-in timer that comes into operation when refrigeration has taken place. It is also equipped with a hermetic condenser unit and a slow-speed stirrer.