Market Application The DVBL vacuum unit not only shares some characteristics of ordinary Roots vacuum pump units, but also, due to the adoption of a water ring vacuum pump as the pre-stage pump, it is particularly suitable for extracting industrial processes that contain a large amount of water vapor and gases with certain corrosiveness and condensability. For example, vacuum distillation, vacuum drying, vacuum concentration, vacuum evaporation, dehydration crystallization and other processes can all be carried out using this type of vacuum unit. Metallurgy Chemical Engineering Oil drying and degassing Pharmaceutical freeze-drying Vacuum Distillation Vacuum packaging Vacuum Clamping The vacuum performance of the DVBL Rots water-ring vacuum unit The Rots water-ring vacuum pump unit is composed of one water-ring pump and one or several Rots vacuum pumps connected in series.