The SJN II concentrator adopts double-effect evaporation, which collects the flash steam generated during first-effect evaporation, then utilizes the steam for heating in second-effect evaporation. When applied in an industrial plant to process large quantities of materials, it saves a significant amount of water, steam, and electricity consumption; the total cost on energy of SJN II is about 40% lower than a single-effect concentrator.

This concentrator employs a natural circulation evaporation method with external heating under negative pressure, featuring fast evaporation rates and a high concentration ratio of up to 1.1-1.3 (for typical Chinese herbal extracts); further modification can also be made upon request, for example, models capable of producing pastes with a higher specific gravity of 1.35-1.45 can be offered to meet specific consumer demands.

All material-contacting parts on the concentrator are made of stainless steel as compliant with the GMP standards; its surfaces are polished to mirror or matte finishes. The heater and evaporators are equipped with stainless steel insulation boards.

This concentrator is suitable for concentrating liquid materials including traditional Chinese medicine, Western medicine, starch-based sugar, food, and dairy products.