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A perishable substance is preserved by removing water using a freeze drier, which increases its shelf life and/or makes it easier to transport.
Freeze-dryers are regularly designed with four basic components: a drying chamber, a vacuum pump, a heat source, and a condenser
A totally frozen sample is placed under a vacuum to eliminate any remaining water or other solvents, allowing the ice to transition directly from a solid to a vapor without first going through a liquid phase. This procedure is known as freeze drying.
A freeze dryer is a device that is used to remove moisture from various materials under vacuum and low temperature conditions. This method preserves the structure, composition, and properties of materials in the long term and is usually used in the pharmaceutical, food, biotechnology, and laboratory industries.
In general, the purpose of the freeze drying process is to store the product, preferably at ambient temperature, for a long time, which can be easily provided in some products. In fact, by separating water from the products, the main cause of degradation — moisture, can be separated from the product and ultimately a quality and completely dry product can be obtained. In products such as fruits, the presence of moisture is a factor that causes the growth of bacteria and the activation of enzymes in them.
Despite the heat of the environment, the rate of spoilage increases, so by separating this water, the destructive effect of moisture can be reduced to the lowest level. Another feature of freeze-dried products is their low weight and lightness. In some materials, more than eighty percent of their weight is water, and therefore, after freeze-drying, it becomes easier to transport due to its lightness.
One of the main components of the correct functioning of a freeze dryer is to create a complete vacuum in the device chamber. To achieve such conditions, it is very necessary to use a high-quality vacuum pump for the freeze dryer. These pumps help accelerate the sublimation process by creating negative pressure and prevent damage to the structure of the material.
If you want to learn about the function and types of vacuum pumps, be sure to read this page of our site.
Home freeze dryers are commonly used to freeze-dry fruits. By removing the water in the fruit without damaging its texture or nutritional value, this device produces fruits with a high shelf life and desirable quality. In this method, the taste, color and nutritional properties of the fruits are preserved and the final product is very light and suitable for long-term storage. The amount of water in the fruits varies depending on the type of fruit, but is approximately between 90 and 97 percent.
One key advantage of this type of freeze dryer is that it handles the pre-freezing step internally.
Laboratory dryers are key tools for conducting scientific research, production processes and quality control in various industries. These equipments play a fundamental role in developing knowledge, producing new products and improving industrial processes. From pharmaceutical and chemical laboratories to food and agricultural industries, advanced equipments such as freeze dryers, spray dryers and rotary evaporators are used as vital tools for carrying out specialized processes.
Among the types of drying and condensing products of Dena Vacuum, we can mention laboratory freeze dryers, semi-industrial freeze dryers, spray dryers, vacuum ovens, rotary vacuum concentrators, layered laboratory freezers and…
Semi-industrial freeze dryers are located between laboratory and industrial freeze dryers in terms of capacity and features and are designed for semi-industrial and pre-production experiments. This device is used to develop new processes, produce prototypes and check the quality of products before mass production. This type of freeze dryer helps companies find the most optimal methods for drying materials before investing heavily in industrial production. Semi-industrial freeze dryers are usually capable of processing medium volumes of materials and are ideal for testing product quality in conditions close to industrial scale. Dena Vacuum semi-industrial freeze dryers are available to our valued customers in two capacities of 5 liters and 10 liters with two temperatures of -50 and -80 Celsius.
Semi-industrial freeze dryer
5 liters with temperatures of -50 and -80 Celsius
Semi-industrial freeze dryers are also used for mass production of dried materials in various industries. This device is used on a large scale for drying pharmaceutical, food and biological products. Industrial freeze dryers have high capacity, optimal efficiency and continuous operation.
This device is very suitable for large companies that need to produce high-quality and long-lasting products. One of its distinctive features is the use of advanced technology for precise control of the drying process, which allows the production of standard and quality products. Among the features of the device is the ability to precisely adjust temperature and pressure. This feature is very important in drying heat-sensitive materials, such as drugs and biological materials.
The price of a freeze-dryer depends on various factors, each of which affects its performance and quality. One of the most important factors is the capacity of the device; in general, small laboratory devices are cheaper than high-capacity industrial models. Also, the type of application has a great impact; devices used in the pharmaceutical and biological industries are usually more expensive due to their precision and specific standards. The quality of construction and the use of high-quality materials such as stainless steel in the construction of the chamber and internal components can also increase the cost.
In addition, advanced control systems such as digital displays and the ability to precisely adjust temperature and pressure increase the price of the device. Energy consumption and efficiency are also important factors; devices with energy-saving technology may have a higher initial cost.
Pilot Scale Freeze Dryer are specially designed for drying processes of large-scale production units. Prefreezing and drying will be realized on liquid temperature controlled shelves inside the separate drying chamber (double-chamber-system). Pilot freeze-dryers are devices for process optimisation or small batch production in flasks (vials) or product trays.Pilot freeze-dryers are instruments specialized for process optimization or small batch production in flasks (vials) or product trays.
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Some of the best laboratory equipment in the world is produced by Dena Vacuum. We don't operate here to be typical. Our mission is to excel at satisfying the demands of our clients.
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