The jacketed kettle is a type of food processing equipment composed of an inner and an outer double-layered kettle body, with a heating medium (such as steam, hot water, or thermal oil) circulating in the interlayer for heating. It comes in various types including fixed, tiltable, and stirring models. The jacketed kettle boasts a large heating surface area, uniform heating, short boiling time for liquid materials, and easy temperature control. It is widely used in food processing fields such as candy, pharmaceuticals, dairy products, and beverages, as well as in cooking in restaurants or kitchens. When using the jacketed kettle, it is necessary to ensure the quality of the heating medium, regularly inspect and maintain the equipment, and comply with operating procedures and safety regulations.