1.What are the advantages of freeze-dried products?
1. Freeze-dried products retain their natural taste, aroma and colour without losing their nutritional value； 2. Freeze dried products do not contain any preservatives; 3. The elimination of water from the primary product significantly reduces the growth of microorganisms and bacteria; 4. Freeze-dried products are light, easy to transport and have a long shelf life.
2.How to select a right freeze dryer?
No home or kitchen freeze dryer to freeze dry food, low prices are always attracting customer's attention. Obviously, the reason for the low price is the source of backward technology and poor quality. No supplier will lose money to do business. Now the most inquiries are a family-style freeze-drying machine or in-situ machine. Since this machine does not have a separate cold trap to freeze the water vapor in the product sublimation process, the vacuum pump oil will emulsify in a short time. , The user needs to frequently replace the vacuum pump oil. In order to reduce the cost as much as possible at the beginning of the design of other freeze dryers, the configuration of compressors, vacuum pumps and cold traps is minimized, which ultimately results in low equipment output, particularly long production cycles, and relatively high production costs. Therefore, before finally deciding to purchase a freeze dryer, you must conduct detailed market research and comparison to make a correct judgment.
3.How long is our production leading time?
It depends on which country and region the equipment is exported to. If it is a country in the Asia-Pacific region, the delivery period is 60-90 days, if it is in Europe, the delivery period is about 80-120 days; if it is in the Americas, the delivery time is 90-150 days. Of course, the delivery cycle mainly depends on the size of the equipment and the company's order situation at that time.
4.When can I get price or quotation?
We usually offer the quotation within 1-2 working days for equipment and 3-5 working days for system after receiving your inquiry. For urgent offer, please contact with us for special. Please provide your company name and website, email address if possible.
5.Which freeze dryer is right for me?
Small Freeze Dryer: - Capacity of each batch is about 3-20kg/batch, you can choose LG0.2, LG1.0, LG1.5 model lyophilizer; Medium Freeze Dryer: - Capacity of each batch is about 50-500kg, you can choose LG5, LG10, LG20, LG30 model lyophilizer; Large Freeze Dryer: - Capacity of each batch is about 600-3000kg, you can choose LG50, LG75, LG100, LG125, LG200 model lyophilizer.
6.What type of product can be freeze dried?
You truly can freeze-dry almost anything. All kinds of product, such as fruits, vegetables and meats, sea food, herbs, soluble coffee, pet food, etc. and all product taste wonderful when freeze dried. That includes things like tomatoes, apples, bananas, strawberries, peaches, green beans, peppers, onions, potatoes, spinach, shrimp, pork, beef, turkey and even ice cream. Your favorite meals that include meat may be easily freeze dried. Foods like lasagna, rice dishes, cheese macaroni, chili, beef stew, chicken a la king, casseroles, shrimp, lobster, pulled pork, pasta sauces or scrambled eggs are perfect for this process. You can freeze dry pet food for dog, cat or fish, bird, etc. You will find that it is a delight to experiment with different foods and meals in your pilot freeze dryer. A great way to start is by picking meals that are already favorites in the market or supermarket. You will own the market when your freeze dried product kind is more than other manufacturers'.
7.How long does it take to freeze dry product each batch?
It typically takes between 10 to 30 hours to complete the process. Food type and quantity will affect the freeze-dry cycle. Things like meat, peas and corn dry quickly, while squash and watermelon can take longer. The thickness of the food slices will affect the cycle time too. The drying time is based on the water and sugar content of raw material, less water and sugar of raw product will dry faster. Most importantly, you need put product in the trays and try to keep them even.
8.What is freeze drying?
Freeze drying, also known as lyophilization, is widely regarded as a superior industrial drying and preservation method. By drying at lower pressure, boiling points are lowered which allows products to dried at lower temperatures compared to other methods. This reduces damage to the product and ensures cellular integrity is retained. Perhaps the key benefit of freeze drying is that all cellular integrity is retained throughout the drying process. The only thing removed from the product is water. This means that products retain the following characteristics from when they're fresh to when they're dry. Other benefits include the fact that vitamins and enzymes remain intact, shipping weight is significantly reduced and shelf-life is extended to over 5 years, providing suitable packaging is used. Reconstitution (rehydration) is almost instantaneous when water is added to the dried product.
9.What is freeze drying step?
General steps to successful freeze drying are as follows: 1. Product freeze Moisture is ‘locked’ into the product by freezing in a separate freezer. NB: Difficult products can be frozen inside the Freeze Dryer. Shelf freezing reduces the shelf temperature in the chamber to -18°C or lower, but this adds to the processing time. So, most of customer use separate freezer. 2. Product load Product is placed into a drying chamber by trolley, which is evacuated to low pressure. As a guide, atmospheric (sea level) pressure is 100000Pascal, and the chamber is evacuated to less than 100pascal before drying begins. 3. Product dry step Energy is then gradually applied to the product over a period of 10-24 hours, although this varies depending on the product and loading. This heat (energy) causes the ice to sublimate – that is transform from ice to vapour without passing through the liquid phase. The water vapour is then attracted to the lower temperature ice coil where it condenses as ice. 4. Unload and Pack Product is removed and packed in air tight sealed bags to prevent rehydration, so package material is very import to choose for freeze dried product.
10.What are the components of the freeze-drying equipment?
Freeze dryer include drying chamber, vacuum system, heating system, refrigeration system, control system and accessory equipment, etc. Large freeze dryer also include hot water system, monorail system, pneumatic system, quick freezing room (air blast freezer), trolley, trays, etc.