With the help of short warm up times, turbo drying and high-precision temperature vacuum oven has been successful in reflecting all its strength. In addition, at the same time it has the ability to handle the heat-sensitive substances along with materials that include food, cosmetics, clocks, PCBs, books and other electronic apparatus with unparalleled placidness during aeration.
The direct contact between the chamber load and heating and removable thermal shelves in all models of vacuum drying oven guarantees a quick along with even temperature control without loss of heat. Due to direct contact between heating and chamber load, both heating as well as operating times in drying oven get reduced up to a certain extent in comparison to conventional drying oven.
What is the Usage of Vacuum Drying Oven?
A vacuum oven usually taken into usage for drying comprises of a chamber that holds a volume of up to 150 liters along with a temperature range starting between 5 – 15º Centigrade and 250º Centigrade above room temperature. Some appliances can easily operate at even 400º Centigrade, which is used for hi-fi purposes.
The interior portion of the drying oven is manufactured using corrosion-free stainless steel that is highly robust and resistant to most acids. Some manufacturers of vacuum drying ovens additionally smooth the interior and sliding shelves by means of electrolytic polishing to make the task of cleaning very much easy.
Under Pressure – Helps in Accelerating the Drying Process in the Oven
During the process of heat treatment, an under pressure within the range of 50 Horsepower is generated. Such a temperature helps in lowering the boiling point of fluids which is too close to room temperature. As a result, heat-sensitive material can be dried in the vacuum drying oven at low temperatures.
At the same time, the drying time also gets reduced in a considerable manner. To shun oxidation an inert gas like Nitrogen is fed into the chamber.
What is the Role of Vacuum Pumps?
It is well known fact that vacuum is generated with the help of vacuum pumps. In case more than one drying oven is simultaneously operated, they can often get connected to a single central vacuum supply. On the basis of suction power, scroll pumps lifetime and application like chemical resistance, free operation, fumes released and many more; scroll pumps or rotary vane pumps can be easily utilized for both low and medium vacuum applications.
Direct Heating – On the Chamber Load
It is a well-known fact that heat transfer cannot take place inside a vacuum. For this, the chamber load is heated. Two basic heating systems that operate in general include:
- Direct heating of carrier shelves
- Transfer of heat from side walls to sliding shelves
With the help of an air jacket, the heat of an air chamber around the interior has been successful in supporting homogeneous temperature distribution inside the chamber. This procedure is little bit time consuming.
In case of a plate heating technique, the directly heated sliding shelves transfer heat towards the chamber load hence shortening the drying time. In addition to digital temperature control, some manufacturers are well known to offer digital pressure control, thus enabling full activation of the programming of defined temperature.
In case inflammable materials like gas, fog, dust and fumes are released into the vacuum during the drying process, a special explosion-proof drying oven is taken into usage. This prevents any sort of mishap like accidents, which may be heavy for huge toll. Manufacturers take due car at the time of manufacturing such industrial equipment.
However, at the same time, if little bit care is taken at the time of usage, then the invention will definitely prove to be a boon. In an industry, drying is a vital process. Hence, it must be carried on with due care!