To understand the working of a vacuum oven, firstly understand the basics of an airtight container and its function. In a vacuum oven, all the thermal processes are done inside an airtight container where a desired level of vacuum has been adjusted with the help of an external vacuum pump. The best part about vacuum ovens is that you can allow the entire application to take place under vacuum or a regulated atmosphere created with the insertion of an inert gas.

There is a misconception that vacuum oven were created for encouraging solvent removal from cannabis oil. Rather, vacuum ovens are a common piece of technology largely used in industrial and laboratory applications. The three major industries that rely on such applications are medical, aerospace, and electronics.

They make use of the vacuum ovens to remove substances from samples without overheating them. During the manufacturing of the samples, there are solvents, epoxies, lubricants, and other chemicals that can travel with the products. When the pressure is reduced in the vacuum ovens, these chemicals are transitioned into gas and escape at lower temperatures.

The Common Purposes of using Drying Vacuum Ovens

  • Out gassing: Out gassing refers to off-gassing, implying the escape of the chemicals that are accompanied by the products during their manufacture. Lubricants, sealants, and metals need these vacuum ovens to rid of these chemicals.
  • Removal of moisture: Since vacuum ovens are devices that do not create the problem of overheating, they are excellent for removing moisture from sensitive substances such as medical devices, microchips, and other such sensitive equipment.
  • Prevention of reactions: The vacuum ovens have a deft control over the temperature and pressure. This allows the technicians to regulate either or both of them for preventing surface reactions like oxidation.
  • Bake-out: This process is only possible with the vacuum ovens. Bake-out is the procedure involved in accelerating the out-gassing process. The heat here is utilized for forcing the volatile chemicals out of the products.

The Industries Where vacuum ovens receive the maximum preference:

This highly resourceful equipment has its impact on the fields of engineering, laboratory, medical sciences, and even aerospace. Mostly used for sensitive flammable substances, the vacuum ovens dry these substances with an ease and a controlled atmosphere of desired vacuum levels.

  • Medical devices: Although medical devices are critically manufactured in a sterile environment, harmful chemicals have their way of creeping into them leading to extreme body complications. Devices like heart valves, artificial joints, and catheters are required to undergo a vacuum processing prior to implantation. Since these devices are often made of heat-sensitive resins, the use of vacuum ovens for eliminating harmful chemicals is a must.
  • Aerospace: The aerospace industry greatly depends on vacuum technology for their research and manufacturing. Before sending out items into space, they need to witness and know how that item reacts in a vacuum environment. In addition, prior to launching into space, the items must be cured. When a combination of thousands of unique components is sent off to space, they begin to off-gas. The chemicals may mix and react in the spacecraft causing fire, condensation, or corrosion. Therefore, for such preventions, all the substances must undergo a vacuum processing prior to launch.
  • Electronics: Vacuum ovens are mainly used in the electronics to cure the coating and dry the components. In standard convection ovens, the electronic boards made of heat-sensitive plastics, would quickly shrink. However, in a vacuum oven by lowering the temperature, the epoxies could be cured, and water could be dried off at low temperatures.

The versatility of vacuum ovens has expanded the reach of the technology allowing more industries to depend on them. Their application is widely acclaimed by experts for taking care of their heat-sensitive devices and curing procedures.


Published by Joel Borthwick