We know that the vacuum oven is a box-type drying equipment that dries the dried material under negative pressure. It uses a Vacuum Pump to pump air and dehumidify to form a vacuum in the working room, lower the boiling point of water, and speed up the drying speed.
The vacuum Drying Oven has the advantages of fast drying speed for specific items, less pollution, and no damage to the inherent quality of the dried items. But do you know why vacuum ovens need to be vacuumed before use? Here are some reasons:
1. Put the sample into a vacuum Drying Oven to evacuate to remove the gas in the material. If the workpiece is heated first, the gas will expand as it is heated. Because the oven is so well sealed, the enormous pressure from the expanding gases could cause the tempered glass of the viewing window to burst. This is very dangerous. This danger can be avoided if we first evacuate and then heat.
2. If it is heated first and then pumped, the heat will be brought to the Vacuum Pump when the hot air is pumped, causing the temperature of the Vacuum Pump to rise too high, which will affect the efficiency of the Vacuum Pump.
3. The heated gas is directed to the vacuum pressure gauge, which will generate a temperature rise. If the temperature rise exceeds the working temperature range specified by the vacuum gauge, it may cause errors in the vacuum gauge display.
To sum up, the correct way to use it is to first evacuate and then heat. If the vacuum degree drops after reaching the rated temperature, please vacuum again for a while. This will help extend the life of your industrial vacuum oven.
