Freeze Dryer

Industrial Freeze Dryer Manufacturer

About Kassel

Kassel is dedicated to providing industrial freeze dryers ranging from 1 ㎡ to 250 ㎡, with equipment input capacities ranging from 10 kg to 3000 kg. The KFD series commercial freeze-dryer is specially designed for food production, enabling mass production of fruits, vegetables, dairy products, coffee, meat, seafood, Chinese herbal medicines, health products, convenience foods, pet foods, and more. Our products utilize high-quality raw materials, advanced technology, and innovative features, ensuring high stability, reliability, and a long service life. Kassel offers a two-year free warranty service and lifetime free maintenance service for all products, with equipment designed to be operational for at least 20 years.

Probiotic Freeze Dryer

KFD-5

KFD-5 is a food freeze drying equipment designed for freeze-drying probiotics, featuring a 50kg processing capacity and the ability to efficiently process 50kg of probiotics at a time. During the freeze-drying process, water is completely removed, reducing the metabolism of probiotics, improving their stability, and extending their shelf life. This experimental food freeze dryer uses silicone oil as the circulating medium and is equipped with functions such as freeze-drying endpoint judgment and freeze-drying process analysis. These functions make it suitable for scientific research, laboratory, and small-scale experimental production needs. The compact and flexible design of the equipment provides a convenient operating experience for new product development and improvement. KFD-5 is characterized by its high efficiency and advanced functions, offering users an ideal solution to meet the professional needs of probiotic freeze-drying processing.

milk Freeze Dryer

KFD-10

KFD-10 Milk Freeze Dryer is a highly efficient food processing equipment with a one-time processing capacity of up to about 100kg of fresh food. This equipment shows excellent performance in the freeze-drying treatment of milk. Taking fresh milk as an example, after sterilization, filtration, degreasing, homogenization and concentration, the milk is put into the material tray of the KFD-10 Milk Freeze Dryer. After pre-freezing, primary drying and secondary drying, most of the water in the milk is effectively removed. The moisture content of the freeze-dried milk is maintained at less than 3%, retaining the original nutrients and taste, and can be quickly melted in contact with water.The KFD-10 milk freeze drying machine not only possesses highly efficient disposable processing capability, but also exhibits excellent stability and long service life. Its high ultimate vacuum ensures stability during the freeze-drying process, allowing the equipment to operate reliably in a production environment.

coffee Freeze Dryer

KFD-20

The Coffee Freeze Dryer is designed for the production of high-quality freeze-dried coffee. Its principle of operation is based on vacuum freeze-drying technology, by which water is removed from the fresh coffee concentrate to obtain coffee powder with excellent taste and easy storage. During the freeze-drying process, the fresh coffee concentrate is frozen into ice cubes, and then, by adjusting the pressure of the drying chamber and slowly heating the frozen coffee concentrate, the water gradually sublimates and transfers from the inside of the coffee concentrate to the surface, where it is eventually removed. This drying method helps to retain the original nutrients, aroma, and flavor of the coffee beans.The KFD-20 Coffee Freeze Dryer can process 200~270kg of concentrated coffee liquid each time. The machine is also equipped with an advanced Siemens PLC control system, which realizes the automation of production and helps to save labor costs. During the freeze-drying process, the PLC system can manage and record various data in real-time, including temperature, pressure, vacuum, time, production failure, alarm, freeze-drying process curve, etc., to ensure a more stable production process.

Fruit Freeze Dryer

KFD-30

Fruit Freeze Dryer is a multi-functional equipment which is not only suitable for freeze drying all kinds of fruits such as Apple, Kiwi, Acai, Blueberry, Banana, Peach and so on, but also can be widely used for freeze drying all other kinds of food. The KFD-30 Fruit Freeze Dryer is capable of efficiently processing 300kg to 450kg of fresh fruits per run, and its integrated design of quick-freezing and drying compartments significantly saves installation area.The machine's aluminum alloy material trays have excellent heat transfer properties and can quickly transfer heat, helping to accelerate the process of fruit sublimation. The aluminum alloy material trolley is lightweight and flexible, providing convenience for material transfer in the production process. Adopting low-temperature drying technology, KFD-30 ensures no loss of color, shape and nutrients in fresh fruits.By removing water, the sugars in fresh fruits are concentrated, giving freeze-dried fruits a sweeter and crunchier taste. Whether it is in terms of process efficiency, equipment flexibility or product taste, the KFD-30 Fruit Freeze Dryer is your best freeze drying processing solution.

vegetable Freeze Dryer

KFD-50

Vegetable Freeze Dryer adopts advanced working principle to first freeze a large amount of water in fresh vegetables into solid state. Subsequently, the vegetables are heated under vacuum conditions to sublimate their internal moisture. After this process, the water content of the vegetables is reduced to between 5% and 10%, maintaining the original volume while presenting a loose and porous structure with excellent rehydration properties.The KFD-50 Vegetable Freeze Dryer has a one-time processing capacity of up to 500kg~750kg of fresh vegetables, and its pre-freezing and drying stages are carried out in two separate compartments, which significantly improves the production efficiency. The equipment is equipped with a partition where the temperature can be accurately controlled at about ±1 ℃, which ensures uniform heating of the vegetables. The freeze dryer is equipped with German Bitzer screw compressor with excellent cooling capacity and high efficiency refrigeration performance, the cold trap temperature can reach -60 ℃, the refrigeration unit operates stably with low noise, low vibration, and low energy consumption per unit.The design and configuration of KFD-50 vegetable freeze dried machine is aimed at providing users with excellent freeze drying processing solutions to meet the demands for high efficiency and stable production.

Large Freeze Dryer

KFD-100

The capacity of KFD-100 large scale food freeze dryer is 1000kg, which can handle 1000kg fresh food materials at a time. The equipment is equipped with oversized water catcher, which can effectively capture the water of food materials in the sublimation process, so as to remove the water in the food and prolong the shelf life of the food. The quality of freeze-dried food materials is better than hot air drying. Spray drying. Vacuum drying and other traditional food. KFD-100 adopts high efficient leybold vacuum system with fast pumping speed, low ultimate vacuum and low noise; KFD-100 is a reliable tool for producing high quality and long shelf life food materials.

KFD-200

KFD-200 large food freeze dryer can process 2000kg of fruits, vegetables, meat and other foodstuffs per batch

Advantages of freeze-dried food

Many heat sensitive substances will not degenerate or deactivate.
When dry at low temperature, the loss of some volatile components in the substance is small.
During freeze drying, the growth of microorganisms and the action of enzymes cannot be carried out, so the original characters can be maintained.
After drying, the substance is loose and porous and spongy. After adding water, it dissolves quickly and completely, and almost immediately recovers its original character.

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What is Industrial Freeze Dryer？

A freeze dryer (Freeze Dryer) is a device that freezes a liquid substance (usually a liquid or slurry of food, drugs, biological samples, etc.) and removes the water from it through a sublimation process. Freeze-drying technology, also known as freeze-drying or depressurization drying, is a method used to preserve the original properties of foods, drugs and other substances.

How Commercial Freeze Dryer Works?

The working process of vacuum freeze dryer is divided into the following stages:
Freezing: The liquid material is first frozen so that the water in it crystallizes to form ice. The purpose of pre-freezing is to shape, if the pre-freezing is not heavy points, the later material in the process of sublimation drying, will collapse, deformation.
Primary Drying Stage: The frozen material is heated under vacuum conditions to transfer water from the solid state to the gaseous state, bypassing the liquid stage, a process known as sublimation. This is a longer step and control of temperature and vacuum levels is critical.
Secondary drying stage: After primary drying, residual water is further removed by slightly increasing the temperature and vacuum level in the drying bin, ensuring that the final product has a moisture content of around 5%

Types of Freeze Dryer

Freeze dryer equipment come in various types.This is because of its adverse application in diverse industries.Some of the types of freeze dryer equipment are as discussed below.

01.Conductive freeze dryer

This type of freeze dryer uses the conduction principle to dehydrate the products.The food or products to be dehydrated are placed on the trays which rest on the heater plates.Also, the slow drying process then begins, where heat is transferred to one side of the food by conduction.Moreover, heat transferred is then used to dehydrate the food by vaporizing the water content.

02.Contact freeze dryer

The contact freeze dryer works with the same principle as the conduction freeze dryers.Once the food substance comes into contact with the heater plates through the contact of the trays, drying happens.This is possible because heat is transferred to the food or product being processed.Thus the product is able to dehydrate due to the exposure to heat.

06.Radiation freeze dryer

In this type of freeze dryer, infrared radiation from the radiant heater is used.The radiation heats the shallow layer of the products on the flat trays.Furthermore, the product dries uniformly because the heating is more uniform compared to the conduction types.

Application of Freeze Dryer

Vacuum freeze drying/lyophilization technology is widely used in export oriented products such as –
Seasonal Vegetables: Red Onion, White Onion, Egg Plant, Beans, Green Peas, Bitter Guard, Drum Stick, Sweet Corn, Mushroom, Baby Corn, Lemon, Capsicum, Potato, Beetroot, Tapioca, Spinach, Fenugreek, Moringa Leaves, Coriander, Chilly, etc.
Tropical Fruit/Juices: Ripe/unripe Banana, Apple, Mango, Pineapple, Jackfruit, Breadfruit, Orange, Guava, Coconut (water/milk/grated), Noni, Acai, Mulberry, Blueberry, Sapota (Chikku), Peach, Avocado, Passion fruit, Guava, Papaya, Apricot etc.
Eggs: Hen, Duck, Quail eggs
Sea Food/Meat: Prawns, Shrimps, Crab, Oyster, Fish, Chicken, Meat, Beaf, etc.
All Pet Foods: Tubifex Worms, Insects, Chicken & Mutton products, etc.
Herbals/Herbal Extracts/Aromatic Herbs: Aloe Vera leaves/gel, Algae, Moringa leaves, Spirulina, Saffron, Mint, Rosemary, Goose Berry (Amla), Wheat Grass, Sena Leaves, Arjun Chal, Shatavari, Musli, etc.
Culinary Herbs: Oregano, Chives, Thymes, Sweet Basil, Parsley, etc.
Spices: Green pepper, Bell pepper, Turmeric, Curry, Green chili, Red chili, Cloves, Cumin, Garlic, Ginger, Cardamom, etc.
Sprouts: Gram, Sorghum, Mung, Soyabean, Peas, etc.
Flower Petals: Rose, Merry gold, Lotus, Jasmin, etc.
Dairy Products: Curd, Tofu, Paneer, Cheese, Milk, Colostrum, Ice cream, etc.
Tea: Leaves/concentrate & Coffee (beans)
Others: Sauces, soups, chutneys, nutraceutical products, medicinal plants/extracts, enzymes, papain, bacterial cultures, algae/spirulina, yeast, salts, insects, surgical sponge, natural colors and flavors, polymer processing, water based chemicals, steroids, pharmaceutical formulations, fresh seeds and instant/mountaineering/astronaut foods/war foods (veg & non-veg cooked items).

Successful Project Cases

Our Certifications

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ISO9001 Certificate

ISO14001 Certificate

Patent Certificate

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Frequently Asked Questions

Q: Are freeze dryers worth it?

A: Whether a freeze dryer is worth buying depends on your specific needs and uses. First if you need to preserve food and maintain its nutritional value, taste, color, shape, and texture, a freeze dryer is a valuable investment. In industries such as pharmaceuticals and biotechnology, lyophilization is used to stabilize and preserve drugs, vaccines and biological materials. Next, consider the cost factor. The initial cost of a lyophilizer can be high, and needs to match your budget and expected revenue. Also, consider the operating costs, as lyophilizers consume relatively high amounts of energy and take a relatively long time to lyophilize compared to traditional high-temperature dryers. To summarize, the cost-effectiveness of purchasing a freeze dryer needs to be carefully evaluated based on your specific needs, budget and the benefits the machine offers. If you are unsure, you may want to consider renting or trying out a smaller machine such as the Kassel KFD-10, KFD-20, KFD-30, etc. to get a better idea of its suitability.

Q: Do freeze dryers use a lot of electricity?

A: The energy consumption of a freeze dryer depends on a number of factors, such as the type of machine, capacity, configuration, and moisture content of the material to be freeze dried. Taking KFD-20 food freeze dryer as an example, it takes about 18-22h to freeze dry a batch of fruit material, and it consumes 800kwh of electricity per 24 hours.

Q: What is the life expectancy of a freeze dryer?

A: The service life of the freeze dryer is related to its configuration, if the quality of the product spare parts is low and the production process is poor, then the service life is only about 5 years. Kassel food freeze dryers are equipped with high quality compressors and vacuum pumps, so that the freeze dryers can last for at least 20 years.

Q: Can you freeze dry raw meat?

A: Raw and cooked meat and eggs can be freeze dried. However, the freeze drying process does not kill harmful bacteria that can cause foodborne illness. Therefore, it is important to carefully label raw meat and handle it appropriately before and after freeze drying.

Q: What foods can you freeze dry?

A: Freeze drying works great for fruits and vegetables, but unlike other options, it also perfectly preserves meat, fish, dairy, eggs, ice cream, and even fully cooked meals. Discover how fun and delicious freeze dried desserts and snacks can be!

Q: Is a freeze dryer just a dehydrator?

A:Freeze dryers are different from dehydrators. Food freeze dryers use freeze drying technology to first freeze the food and then sublimate the frozen water into vapor under vacuum conditions, ultimately removing the water from the food. Freeze drying technology preserves its original structure and properties such as shape, color, and nutrient content. Food dehydrators, on the other hand, use higher temperatures to rapidly evaporate water through heating. The process of dehydration and drying at high temperatures can lead to some changes in the texture, color and nutrient content of the food.

Q: Is freeze dry food bad for you?

A: While it's not a huge issue, it can make a big difference if you're in a hurry, or you don't have cooking equipment, or a stove and fuel handy. Freeze dried food maintains most of its nutrients throughout the process, and once rehydrated, is very similar in nutritional value to its fresh counterpart.

Q: Is it better to dehydrate or freeze dry food?

A: Freeze dried foods retain the vast majority of the vitamins and minerals found in their original state. Freeze dried food retains its nutrition because of the “cold, vacuum” process that is used to extract the water. Whereas, the nutritional value of dehydrated food is generally around 60% of equivalent fresh food.

Q: Can freeze drying reversed?

A: The freeze drying process can easily be reversed by adding water to the freeze dried product.

Q: How long does it take to freeze dry strawberries?

A: 12-22 hours. The exact freeze drying time depends on the moisture content of the strawberries, which will become crispy when completely dry.

Q: How noisy is a freeze dryer?

A: During the freeze cycle, the machine acts as nothing more than a small freezer, which is exactly what it sounds like. There was a quiet buzz. You might hear it, but it won't distract you. When the vacuum pump starts, it quickly settles into white noise.

Q: Why are freeze dryers so expensive?

A: The reason why vacuum freeze dryers seem to be more expensive is due to the combination of its technical complexity, high manufacturing cost and wide range of applications. Although the price of freeze dryer is relatively high, but freeze drying technology can be associated with the preservation of the original shape, color, and more than 95% of the nutrients of the food.

Q: What is the easiest food to freeze dry?

A: Almost anything. Fresh fruits and vegetables are the most basic, but you can also freeze dry full meals, like a plate of lasagna or your favorite soups or stews. Even meat!

Q: Can you freeze dry jello?

A: Freeze drying the jelly took a long time because it took a while to get all the water out. Once it's done, it turns into these super crispy cubes that are hard to bite into.

Q: What do you use a freeze dryer for?

A: Freeze-drying technology can be used to preserve and extend the shelf life of foods such as fruits, vegetables, and meats, while maintaining the original flavor and nutrients. Freeze-drying technology is used to prepare and preserve medicines, which improves their stability. Freeze-drying can be used to preserve biological samples, including cells, bacteria, and yeast, etc. Freeze-drying technology can also be used to produce emergency food for emergencies such as disasters and wars. Overall, lyophilizers play an important role in many fields, helping to achieve long-term preservation of substances, quality retention and ease of transportation.

Introducing the advanced equipment and technology, KASSEL Machinery is professional in offering high quality and customized freeze dryer made in China. Thanks to our quality products and excellent service, we're known as one of the leading manufacturers and suppliers in China. Welcome to get the customized freeze dryer with competitive price from our factory.Two stage Fluidized Monomer Quick Freezing Machine, freeze dryer ethanol, freeze dryer working principle , freeze dryer price , freeze dry machine , freeze drying equipment , freeze dryer machine , vacuum freeze drying