Installation (1) for the pasteurization of a liquid product (P) consisting of at least one liquid component suitable for pumping, with a feed tank (6) for the preparation of the unpasteurized product, with an inlet duct ( 8a) for the transport of the unpasteurized product, with a pasteurization circuit (25) for the pasteurization of the product (P), in which the pasteurization circuit (25) comprises a first heat exchanger (10), and with a outlet duct (8b) for transporting the pasteurized product, characterized in that the pasteurization circuit (25) comprises an intermediate tank (2), which is configured such that it retains the product (P) for a constant contact time prescribed for pasteurization and with an oscillating amount of the flow of the product (P) through the intermediate tank (2), in which the intermediate tank is connected after the first interca heat exchanger (10), in which the amount of unpasteurized product, flowing from the inlet duct (8a) in the pasteurization circuit (25) in the intermediate tank (2), per unit of time is adjustable by means of a first pump (7) connected next to the feed tank (8a), in which the pasteurization circuit (25) comprises a second pump (5) connected next to the intermediate tank (2) for regulating the amount of transfer of the pasteurized product per unit of time from the intermediate tank (2) to the outlet duct (8b), in which a control (9) is provided for the calculation of the amount of product required, which must be fed from the inlet duct (8a) to the pasteurization circuit (25) and to be transferred from the pasteurization circuit (25) to the outlet duct (8b) per unit of time depending on at least one parameter, in which the intermediate deposit (2) It comprises at least one chicane device disposed therein for controlling the direction of product flow.Instalación (1) para la pasteurización de un producto líquido (P) que está constituido por al menos un componente líquido apto para ser bombeado, con un depósito de al
