In a device (V) for treating a liquid foodstuff product (P) containing a solid (T) with a heat exchanger (W) charged with the foodstuff product (P) under pressure (P1) and / or a degasser (E), which is charged with a reduced pressure (P3), followed or preceded by a pressure reduction device (D), the pressure reduction device (D) has at least one brake pump (8) through which the foodstuff product (P) flows. According to the method the pressure with which the foodstuff product (P) is conveyed through the brake pump (8) is reduced by a rotary movement of the brake pump (8).
