👉 A preevaporator is an industrial or commercial device used for the vaporization of liquid substances. These devices are commonly found in food processing, pharmaceuticals, and other industries where a high volume of liquid substance needs to be converted into a gas. The primary function of a preevaporator is to remove water from a liquid material by heating it until it reaches a temperature above its boiling point, at which point the vapor will condense back into a liquid form.