This is a SP (Single Propeller) or DP (Double Propeller) type Crystallizer which is equipped with an element cooling plate inside the stirring tank. It keeps almost the same temperature between the coolant and internal liquid in the crystallizer. It is suitable for obtaining utmost homogeneous crystals and for cases apt to having crystal breakage.
In case of materials that are liable to adhere to the cooling surface, the DP type crystallizer is suitable for the materials.