he sterilizing water is preheated in the top tank, sterilization starts with high temp, which shortens the sterilization time and protects the product quality. After the sterilization, the hot water is recycled to the hot water tank, saving steam, energy consumption and sterilization time. For flexible packaging products, especially big size packaging, the heat penetration speed is fast and the sterilization effect is good. ΠPLC program control, sterilization realizes standardization. It can be equipped with FO value control system to make sterilization more scientific. Uniform heat distribution,easy control of product quality.