When dealing with heat-sensitive, high-value-added, or high-purity materials, traditional hot-air drying often "falls short" — high temperatures can lead to component degradation, oxidative discoloration, clumping, hardening, and even safety hazards. With its unique "low-pressure + low-temperature" operating principle, vacuum drying equipment has become indispensable core machinery in the field of high-end manufacturing.
How Does Vacuum Drying Achieve "Gentle Yet Efficient" Processing?
The core of vacuum drying lies in reducing the chamber pressure through vacuum pumping, which dramatically lowers the boiling point of water or solvents. For example, at a pressure of 10 mbar, the boiling point of water is only 7°C. This enables:
-
Low-Temperature Drying: Allows safe dehydration of heat-sensitive substances like vitamins, enzymes, probiotics, and lithium battery materials at 30–60°C.
-
Oxidation Prevention in an Oxygen-Free Environment: Prevents material discoloration, degradation, and preserves original activity and color.
-
More Thorough Drying: Continuously removes evaporated gases under vacuum, preventing re-adsorption, with residual moisture achievable down to ppm levels.
-
Safer, Closed-Loop Operation: Suitable for the recovery and handling of flammable, explosive, or toxic solvents.
A truly efficient vacuum drying unit also requires:
-
Uniform heat transfer design (e.g., jacketed heating, hot plate conduction, or hot air circulation);
-
High ultimate vacuum and fast pumping speed capabilities;
-
An intelligent control system supporting process curve programming and data traceability;
-
Construction with materials and structures compliant with GMP, ATEX, or cleanroom requirements.
Our comprehensive range of vacuum drying equipment, covering benchtop laboratory, pilot-scale, and fully automated industrial-grade systems, is widely applied in pharmaceuticals, new energy, food, and fine chemicals. It helps customers enhance quality, shorten cycle times, reduce energy consumption, and accelerate compliance.