Why Should You Evacuate Before Heating in a Vacuum Drying Oven？
1) Protect the Vacuum Pump：
If you heat the oven before evacuating, the heated air will be drawn out by the vacuum pump. This process transfers heat to the pump, potentially causing it to overheat. Overheating can reduce the efficiency of the vacuum pump and may even damage it.
2) Preventing Damage to the Vacuum Gauge:
If heating the oven first, heated air would directed toward the Vacuum Gauge and cause this instrument to overheat. If the temperature exceeds the gauge's operational limits, it may lead to inaccurate readings or permanent damage.
3)Avoiding Safety Hazards:
The tested material is placed in the vacuum chamber that can remove extracted gases from the material. If the tested material is heated first, the gas will expand when it encounters heat. Due to the excellent sealing of the vacuum chamber, the immense pressure generated by the expanding gas could cause the tempered glass of the observation window to shatter.
The correct procedure is to evacuate air first and then heat. If the vacuum level drops after reaching the desired temperature, you can briefly re-evacuate. This method helps extend the lifespan of the equipment.
Conclusion:
To ensure safety, maintain equipment efficiency, and prolong the lifespan of vacuum drying oven, always follow the correct procedure: evacuate air first, then heat. This simple step can prevent potential hazards and costly damages.
Product Characteristics of Vacuum Oven
The vacuum oven can obtain a higher drying rate at a lower temperature, and the heat utilization is full, which is mainly suitable for the drying of heat-sensitive materials and materials containing capacitors and solvents to be recovered. It can be treated before drying, and no debris can be mixed in the drying process. The dryer is a static vacuum dryer, so the formation of dry materials will not be damaged. There are many eating methods: steam, hot water, thermal oil and electric heating.
Vacuum ovens are designed for drying heat-sensitive, easily decomposed and easily oxidized substances, and can be filled with inert gases, especially for some complex items.
The product has the following features:
1, chamber structure: chamber adopts integral structure;
2, shell material: high-quality cold-rolled steel electrostatic spray; Inner wall material: stainless steel plate;
3, insulation material: ultrafine glass fiber;
4, the door seal: environmental protection silicone rubber strip. The closure and tightness of the box can be adjusted, and the silicone rubber door sealing ring is formed as a whole to ensure a high vacuum inside the box.
5, the studio is made of stainless steel plate (or wire drawing plate) to ensure that the product is durable.
6, storage, heating, testing and drying are carried out in an environment without oxygen or full of inert gases, so there is no oxidation.
7, the shortest heating time, compared with the traditional drying oven heating time reduced by more than 50%. Because the vacuum oven is provided with heat energy by electricity, and the wet items are conductive, it is advisable to be careful not to have leakage in use, so the general oven should be grounded to ensure safety. If there is no ground wire, it is necessary to confirm that there is no leakage of electricity in the oven; If there is no leakage, it can be used with care, and if there is still leakage, it should be stopped immediately.
Vacuum oven is designed for drying heat-sensitive, easily decomposed and easily oxidized substances, can be filled with inert gas (optional), especially some complex components of the articles can also be fast drying, suitable for industrial and mining enterprises, medical schools, scientific research units in vacuum conditions for drying heat treatment.
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