Vacuum oven principle and operation points

A vacuum Drying Oven is a common laboratory device used to remove moisture or other solvents from a sample under low pressure and low temperature conditions. Its working principle is based on creating a low pressure environment that reduces the boiling point of the sample surface, thus enabling the volatilization and evaporation of water at lower temperatures. The following are the working principles and operation points of a vacuum Drying Oven:

Working principle:

Vacuum pump pumping: When the samples in the drying box are placed and closed, the Vacuum Pump begins to extract air from the box, gradually reducing the pressure and creating a low-pressure environment.

Lower boiling point: Due to the low pressure environment, the boiling point of the sample surface is reduced. This means that moisture can evaporate and evaporate at lower temperatures without the need for high temperatures.

Evaporation of water: The water in the sample begins to be influenced by lower environmental pressures, gradually evaporating and evaporating into water vapor.

Vacuum exhaust: The Vacuum Pump will extract the water vapor from the Drying Oven to maintain a low-pressure environment.

Operation points:

Sample preparation: Make sure your samples are neatly arranged to avoid overlapping or blocking air circulation. Samples must be able to dry safely in a low-pressure environment to avoid the spill of volatile substances.

Vacuum pump operation: Turn on the Vacuum Pump and connect it to the Drying Oven. Start the Vacuum Pump and start the pumping process. Some devices may have automatic control systems that can set the required vacuum level.

Set parameters: Open the Drying Oven control panel and set the required temperature and vacuum. These parameters are set according to your experimental needs.

Start drying: Close the Drying Oven door and start the drying process. Make sure the sample and temperature settings in the Drying Oven meet your requirements.

Monitoring process: During the drying process, you can monitor changes in temperature and vacuum with indicators on the control panel. Make sure they stay within the required range.

End drying: After the set drying time is reached, turn off the Drying Oven and Vacuum Pump. Allow the Drying Oven to return to normal pressure.

Remove the sample: Carefully open the oven door and remove the dried sample. Please note that the sample may be very hot and require the use of appropriate protective gear.

Cleaning and maintenance: After use, remove residue and dirt from the Drying Oven. Maintain the equipment regularly to ensure its normal operation.

Operating a vacuum Drying Oven requires some professional knowledge and experience. Make sure to read the equipment's operating manual and follow the laboratory's safe operating procedures before operation.