... m, 1 layer to 10 layers of drying unit BVD digital vacuum belt dryer:BVD Series vacuum belt ... is not suitable or can not use spray drying, vacuum oven drying of the material. Vacuum belt dryer is ... m, 1 layer to 10 layers of vacuum belt drying unit.A test prototype in the factory, welcome to ... steam heating, oil heating and direct electric heating plate heating and other heating methods.13, the device ...