Vacuum boxes (vacuum driers) mainly dehydrate high-value, heat-sensitive farm products, health foods, foods, herbs, fruit/veg and chemicals; also low-temp concentration, crystal-water removal and enzyme drying; vacuum extraction of Chinese herbs; and lab use in research institutes.
As quality demands rise, vacuum boxes are more needed in adhesive industries - red, silicone and black glues need degassing after dispensing. Xinhai vacuum boxes are widely used in optoelectronics, electronics, silicone and plastics/hardware.
vacuum drying oven vacuum
1) If you heat first then pull vacuum, heat is carried into the pump and may overheat it, cutting efficiency.
2) Hot gas directed to the vacuum gauge heats it; if above the gauge rating, readings may err.
Correct use: pull vacuum first, then heat; if vacuum falls after reaching rated temperature, top up the vacuum briefly - this helps extend equipment life.
