Efficient Separation and Column Switching Function – The CS 1521 Prep HPLC System is engineered for high-efficiency separations and seamless column switching, ensuring superior performance in preparative workflows. Its large-capacity column oven supports preparative columns up to 50 mm internal diameter, enabling a wide range of sample loading from milligram to gram levels with outstanding reproducibility. The system’s patented forced air circulation design ensures a highly uniform temperature field, optimizing separation stability and peak consistency. Additionally, the optional dual-valve switching feature allows for automated desalination and impurity removal using dual-column configurations—streamlining complex purification processes. Combining intelligent design with operational flexibility, the CS 1521 Prep delivers precise, efficient, and automated chromatographic separations for advanced purification applications.