A solution circuit apparatus (30) for a blood purification system (50) comprising an extracorporeal blood circuit (40) and the solution circuit apparatus (30), comprises: a solution source (1)； a warmer (3) having a temperature sensor (8)； a bypass branch (26)； a delivery branch (25) communicating with the extracorporeal blood circuit (40)； a pump (2)； a switching means (5)； and a control unit (39) configured to set the solution circuit apparatus (30) into one of a solution delivery condition and a solution stop condition. In the solution delivery condition the switching means (5) interrupts the bypass branch (26), and the pump (2) delivers solution via the warmer (3) and through the delivery branch (25). In the solution stop condition the switching means (5) interrupts the delivery branch (25), and the pump (2) recirculates solution through the warmer (3) via the bypass branch (26). In the therapy stop condition the pump rate is dependent on the output of the temperature sensor (8).
