Chemical Industry
Central vacuum supply
Central vacuum supply systems are used to replace a multitude of individual generators. The advantage of this configuration: lower energy consumption and controlled removal of cooling energy.
Relevant products: Liquid Ring, Rotary Vane, Screw, Claw
Coating
When industrial surfaces are coated, metal vapours are handled under vacuum. In typical processes the metal condenses as a thin layer on the surface of the substrate. Vacuum is necessary to keep the metal vapours under pressure.
Relevant products: Liquid Ring, Rotary Lobe, Screw
Cooling
Surfaces are cooled through the controlled evaporation of water or other solvents. The latent heat of the substrate and the vacuum remove the localised heat, causing a cooling effect.
Relevant products: Liquid Ring, Rotary Vane, Screw
Continuous and batch distillation
See "Solvent recovery."
Relevant products: Rotary Vane, Screw
Degassing
Extruders are typically used for product degassing. In extruders highly viscous substances are compressed and simultaneously freed of solvents. The vacuum pump used serves exclusively to evacuate low boiling point solvents as well as any air that has entered the material through leaks.
Relevant products: Liquid Ring, Rotary Vane, Screw, Claw
Drying
All medicinal products are dried before entering the marketplace. Solvents are removed from the product in a heatable static or dynamic dryer. The advantage of vacuum drying is that the product can be processed at low temperatures. The temperature always corresponds to the vapour pressure of the solvent being used.
Relevant products: Liquid Ring, Rotary Vane, Screw
Gas compression
Gases must be compressed before they can be pumped through pipelines for further use. In many cases this compression is also necessary in order to reduce the volume of storage space required.
Relevant products: Liquid Ring, Claw
Impregnation
Impregnation involves the following process: The final product, a motor winding for example, is evacuated in a receiving vessel. A suitable impregnating agent, such as a resin, penetrates the surface of the material under vacuum.
Relevant products: Liquid Ring, Rotary Vane, Screw
Pneumatic conveying
Chemicals can be conveyed safely and economically with stand-alone compressors or vacuum pumps and central systems. Dust free and therefore loss-free conveying, simple design of the piping and no deformation of the conveyed material are assured.
Relevant products: Claw, Rotary Lobe
Solvent recovery
Wastewater that is contaminated with solvents must be treated for environmental reasons. The simplest method is vacuum distilling, where the low-boiling-point fraction is evaporated and then condensed. The wastewater is then transported elsewhere for further use.
Relevant products: Liquid Ring, Rotary Vane, Screw
Thin-layer evaporation
This process, which is also called molecular evaporation, is used to separate substances that have narrow boiling point ranges. Such equipment has a special design that only operates properly at specific vacuum levels.
Relevant products: Rotary Lobe, Rotary Vane, Screw