Vacuum ovens are very versatile pieces of equipment with applications in laboratory research, engineering, and industry. A vacuum drying oven is most often used for delicate drying processes, such as drying tiny parts or removing flammable solvents. The low pressure environment also minimizes oxidation during drying. A standard vacuum oven can operate at temperatures as high as 200C to 250C. A rugged, high quality pressure chamber, gasket seals, and pump are features to look for, as well as convenient, programmable controls and a computer interface. Vacuum drying ovens are also available with specialized features such as solvent recovery or residual gas analysis to prevent over drying. For drying flammable solvents, look for a safety vacuum drying oven that has been approved for these types of applications.
How vacuum drying ovens work
Many samples are very sensitive and tend to be damaged by the drying process. The drying process in the vacuum drying chamber reduces this risk to a minimum. The aim of this method is to gently dry a high-grade product that contains water or a solvent without altering its properties in the process. When drying under a vacuum, the pressure in the drying chamber is reduced so that water or solvents evaporate even at low temperatures. This process also promotes capillary transport. The targeted supply of heat and pressure control optimize the drying process. The method is primarily used with heat-sensitive products such as food and some chemicals.
Many vacuum drying units apply heat directly to the shelf racks via internal electrical contacts. These are often difficult to clean if they become contaminated and can even corrode over time, becoming unusable. BINDER vacuum drying chambers, on the other hand, use patented technology based on a heat-conducting expansion rack support. Heat is transferred uniformly from the outside wall to the closely positioned expansion racks in order to guarantee the best possible heat transfer.
Areas of application for vacuum drying ovens
Drying in a vacuum drying chamber is particularly recommended for substances containing flammable solvents. When dried under ambient conditions, these substances usually create a highly explosive atmosphere, which is prevented by drying in a vacuum drying chamber. The BINDER vacuum drying chambers are therefore suitable for use in the electrical and semiconductor industries, as well as in the life science sector and the plastics industry. The vacuum drying cabinets are available with a capacity of 23 to 115 liters. The models from the VDL series feature special safety equipment intended for use in drying flammable substances.