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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.
In addition to freeze dryers, several other advanced vacuum drying devices are widely used in laboratories and various industries. Each of these systems offers unique features and applications tailored to specific drying requirements. Below, we explore four key types of drying equipment and their benefits.
A spray dryer is a specialized device used to convert liquid solutions or suspensions into fine powder through a process of rapid drying. It works by atomizing the liquid into tiny droplets and introducing them into a stream of hot air. This results in instant evaporation of moisture and production of dry particles.
Applications:
Food industry (e.g., powdered milk, instant coffee)
Pharmaceutical industry (e.g., drug powders)
Chemical processing
Key Advantages:
Fast drying speed
Precise control over product properties
Ideal for heat-sensitive materials
High-volume processing capability
Note: Despite its benefits, spray dryers have relatively high energy consumption, which can increase operational costs.
A vacuum oven is designed to dry materials under reduced pressure, allowing moisture to evaporate at lower temperatures. This makes it particularly effective for drying heat-sensitive substances without damaging their structure or properties.
Applications:
Chemical and pharmaceutical labs
Biological research
Solvent removal and sterilization processes
Key Advantages:
Gentle drying with minimal thermal stress
Shorter drying times
Adjustable temperature and pressure controls
Preserves material integrity
This equipment is essential for professionals dealing with delicate or temperature-sensitive samples.
The vacuum rotary concentrator is a highly efficient device for removing solvents from samples using a combination of heat, vacuum, and centrifugal force. The vacuum lowers the boiling point of liquids, enabling faster evaporation without exposing materials to high heat.
Applications:
Concentration of chemical and biological solutions
Separation of compounds
Removal of organic solvents in research and production labs
Key Advantages:
High-speed operation
Precise process control
Minimal thermal degradation
Energy-efficient and solvent recovery enabled
The rotating chamber ensures even heat distribution and prevents bumping during evaporation.
A rotary evaporator (rotovap) is a common laboratory device for solvent evaporation, typically used in concentration and purification processes. It consists of a rotating flask that continuously agitates the solution while being heated. Combined with a vacuum system, this setup allows solvents to evaporate at significantly lower temperatures.
Applications:
Sample concentration
Solvent recovery and reuse
Extraction and purification of compounds
Key Advantages:
Rapid evaporation time
Protection of heat-sensitive compounds
Reusability of solvents through condensation
Easy operation and ergonomic design
Rotary evaporators are a staple in modern labs due to their versatility and safety.
Sanat Pardaz Dena is a trusted name in the field of advanced laboratory and industrial equipment. We are proud to hold the ISO 9001 certification, a global standard that reflects our dedication to quality management and customer satisfaction. Our innovative vacuum drying systems are engineered to meet the needs of modern laboratories and manufacturing environments, ensuring both precision and reliability.
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.
Our tools safeguard scientists from injury, preserve evidence that helps solve crimes, and facilitate research that could save lives. We take this obligation very seriously. Performance, quality, and safety are paramount. Nothing is left up to chance with us.
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