Described is an independent module for heat treating food product fluids (1), for a pasteurizing system, the module (1) comprising: a selection/exclusion unit (10) for interfacing the module (1) to an external pasteurizing system (P), the selection/exclusion unit (10) being active between a consent configuration, wherein it is enabled for the exchange of a flow of food product fluid between a pasteurizing system (P) and the module (1), and an exclusion configuration, wherein the exchange of a flow of food product fluid between a pasteurizing system (P) and the module (1) is disabled a pumping unit (20) to impart a predetermined pressure on a flow of food product fluid already pasteurized coming from a pasteurizing system (P) through the selection/exclusion unit (10) a heating unit (30) for heating to a predetermined temperature the flow of food product fluid already pasteurized coming from the pumping unit (20) an adaptation unit (40) having an inlet for receiving the flow of food product fluid coming from the heating unit (30) and an outlet for sending the fluid to the selection/exclusion unit (10), the adaptation unit (40) varying the pressure and temperature values of the flow of food product fluid coming from the heating unit (30) to make them substantially coincide with the operation pressure and temperature values of the external pasteurizing system (P).
