Vacuum drying oven matters needing attention when purchasing
What should I pay attention to when purchasing a vacuum drying oven? As a kind of equipment widely used in various industries, drying oven is not only rich in variety, but also has mature technology. Many manufacturers can produce it, which leads to a mixed bag in the market, which is a good source for our purchase. For the inconvenience, the following will explain how to choose a vacuum drying box.
When purchasing a vacuum drying box, it can be comprehensively considered from the outside to the inside from the following aspects.
DZF-6090 vacuum drying oven
First of all, look at the shell of the drying box. Most of the shells of the drying box are made of ordinary cold-rolled steel plates. The surface is treated with high-strength electrostatic spray coating, and the paint film is smooth and firm. The main difference is the thickness of the steel plate. For the vacuum drying box, the internal pressure on the box body is relatively large due to the internal vacuum, and the outer shell is thicker than that of the blast drying box. Under the condition of the same quality of steel plate, the thicker it is, the longer the service life is. Without vacuuming, the casing is relatively thin and relatively cheap. If there are special needs, the shell will be made of high-quality stainless steel or special steel. Of course, the price is relatively high. How to choose depends on your needs. Generally, ordinary steel plates are enough.
Secondly, there is usually a glass window on the door of the drying box. For safety reasons, double-layer tempered glass is generally used, but the thickness is different. Henan Lanphan's drying oven doors are all made of thick high borosilicate tempered glass. Although the price is slightly expensive, it has good clarity, good safety and long service life.
There are generally two options for the inner tank of the drying box, one is galvanized sheet, and the other is mirror stainless steel. Galvanized sheet is easy to rust during long-term use, which is not conducive to maintenance, but the price is low; mirror stainless steel has a neat appearance, easy maintenance, and long service life, but the price is slightly higher. Stainless steel is the best choice for high-demand industries such as food and medicinal materials.
The number of layers of sample racks in the box is generally customized according to the size of the drying box and customer needs. Usually a good shelf is made of stainless steel, and the cost is higher, while the ordinary shelf is made of ordinary steel plus electroplating, and the cost is lower. In terms of thermal efficiency, the number of shelves should not be too many, otherwise too small gap will be unfavorable to the circulation of internal heat and increase the load of the fan, so usually the height between each shelf will be reasonably arranged according to the area of the shelf and the size of the internal space . So when buying, don't blindly listen to the merchant's claim that your product can dry more items, and the more items that can be dried, the better.
DHG-9420A blast drying oven
There are generally two types of insulation fillers in the middle of the drying box:
The first kind of fiber cotton, the price is reasonable but the heat preservation is average, the temperature in the box needs to be controlled and adjusted continuously by the temperature controller, so as to maintain the temperature in the box, it will increase the working intensity of the fan and the controller, and to a certain extent Reduce the life of the drying oven. In terms of post-maintenance, the replacement is convenient and simple to operate, and in general, it can meet the use in most cases.
The second type of polyurethane is expensive but has better thermal insulation and thermal insulation effects. The high temperature in the box can be kept stable within a few hours, which will reduce the operating frequency of the controller. It will be too high, which is safer for the operator. In terms of post-maintenance, since the polyurethane is injected into the box as a whole, it is necessary to take out all the polyurethane during maintenance, and then inject it in after repairing. The complicated operation will increase the post-maintenance cost.
Therefore, when purchasing a drying oven, not only depends on the material, but also depends on your own needs, such as the use scene, the use industry, and the cost to comprehensively consider. There is no need to blindly pursue high prices.
The above is a summary of the precautions when purchasing a vacuum drying box for everyone. If you have needs, you can contact Zhengzhou Keda Machinery Equipment Co., Ltd. For decades, Zhengzhou Keda Machinery Equipment Co., Ltd. has been committed to the production and manufacture of laboratory instruments and pipe fittings. If you want to know about our products, or want to buy our instruments, please feel free to contact us, we will be happy to help you.
