LG-type freeze dryers are a range of industrial vacuum freeze-drying systems developed by Shenyang Aerospace Xinyang Quick-Frozen Equipment Manufacturing Co., Ltd. They are engineered for food, herbal, pharmaceutical, and nutritional product industries, combining aerospace-level technology with decades of experience in industrial Freeze-drying equipment.
Freeze drying, also called lyophilization, removes moisture from frozen products by sublimation under vacuum, allowing products to retain their original shape, color, texture, flavor, and nutrients. LG-type freeze dryers are designed for precision, high efficiency, and consistent product quality, making them ideal for industrial and export-oriented production.
Multiple chamber options: LG-125, LG-200, LG-240, and larger configurations for small to large-scale production
Radiant heating plates: Ensure even heat distribution across trays for uniform drying
Advanced vacuum systems: Quickly establish and maintain precise vacuum pressure for optimal sublimation
Cold traps and condensers: Efficiently capture water vapor to maintain vacuum and improve energy efficiency
Automated control systems: PLC and PC-based monitoring for temperature, pressure, and process data logging
LG-type freeze dryers can process fruits, vegetables, herbs, prepared meals, pet foods, and nutritional ingredients, providing premium quality freeze-dried products suitable for global markets.
LG-type freeze dryers are used in:
Food industry: Freeze-dried fruits (strawberries, blueberries, apples), vegetables (peas, carrots, mushrooms), and ready-to-eat meals
Herbal and medicinal products: Ginseng, goji berries, herbal powders, and plant extracts
Pet food and snacks: High-value, lightweight, and shelf-stable products
Nutraceuticals and supplements: Protein powders, vitamins, and functional foods
Freeze-dried products produced using LG-type dryers retain excellent rehydration, flavor, texture, and nutrients, making them ideal for premium retail, export, and emergency food applications.
Product Preparation
Materials are cleaned, cut, and pre-treated according to product specifications to ensure uniform freezing and drying.
Tray Loading and Freezing
Frozen products are placed on aluminum alloy trays and stored at –25°C or below in a freezing tunnel or cold storage.
Vacuum Freeze Drying
Frozen trays are transferred to the drying chamber. The vacuum system reduces pressure, while radiant heating plates gently sublimate ice into vapor. Water vapor is captured by the cold trap, ensuring consistent drying and preventing condensation.
Completion and Packaging
Sterile air or nitrogen is introduced to normalize chamber pressure. Dried products are removed, inspected, and packaged. Empty trays are cleaned for the next production cycle.
Uniform Drying: Radiant heating plates provide even heat distribution, minimizing product variation
High Efficiency: Cold traps and vacuum systems optimize water removal and energy consumption
Product Quality Preservation: Maintains color, flavor, shape, and nutrients
Scalable Production: Models available from LG-125 to LG-240 and multiple-chamber systems for flexible production capacity
Automated Control: PLC and PC monitoring ensure stable, repeatable results
Durable Construction: Stainless steel chambers and high-quality aluminum plates for long-term industrial use
Freeze drying with LG-type freeze dryers provides a reliable, precise, and high-efficiency solution for industrial food, herbal, and nutritional products. These systems ensure premium-quality freeze-dried products with long shelf life, excellent rehydration, and nutrient retention.
With modular chamber options, advanced vacuum technology, radiant heating, and automated controls, LG-type freeze dryers support large-scale industrial production and meet the demands of domestic and international markets.
Freeze Drying with LG Type Freeze Dryers: Industrial Lyophilization Guide
Freeze drying, or lyophilization, is a critical industrial process used to preserve food, pharmaceuticals, and biological materials. LG type freeze dryers are industrial-grade lyophilizers designed for medium-to-large scale production. These systems use vacuum-assisted sublimation to remove water from frozen products without affecting their structure, flavor, or nutritional value.
LG freeze dryers are widely recognized for their reliable performance, energy efficiency, and precise process control, making them ideal for industries where product quality and shelf-life are critical.
The LG type freeze-drying process consists of four main stages:
Raw materials are cleaned, cut, or portioned.
Materials are spread evenly on trays to ensure uniform freezing and drying.
Proper preparation ensures consistent sublimation and product quality.
Products are frozen to temperatures typically between –35°C and –45°C.
Ice crystal formation is essential for efficient sublimation in the drying chamber.
The LG freeze dryer chamber is evacuated to low pressure.
Radiant heating shelves gradually heat the product, causing ice to sublimate directly into water vapor.
Vapor is captured by the ice condenser (cold trap), maintaining chamber vacuum.
Residual moisture is removed by slightly raising the shelf temperature while maintaining vacuum.
Final moisture content typically falls below 5%, ensuring long shelf life and stable product quality.
Stainless steel construction ensures hygiene and durability.
Horizontal or vertical design with radiant heating shelves for even heat distribution.
Airtight doors with observation windows allow monitoring without interrupting the process.
Captures sublimated vapor at low temperatures (–30°C to –40°C).
Ensures vacuum stability and prevents condensation in the drying chamber.
Includes pre-vacuum and maintenance pumps to maintain low-pressure conditions.
Controls chamber pressure to optimize sublimation rates.
Radiant shelves or plates deliver controlled energy to the product.
Closed-loop water or nitrogen heating ensures stable temperature control.
PLC or PC-based control monitors temperature, pressure, and drying cycles.
Data logging and alarms ensure process reliability and regulatory compliance.
Aluminum alloy trays or stainless steel racks for easy loading/unloading.
Uniform spacing ensures consistent airflow and drying.
High Product Quality – Maintains color, flavor, structure, and nutrients.
Industrial-Scale Capacity – Single or multiple units can process medium to large batches.
Energy Efficiency – Optimized heating and refrigeration systems reduce operational costs.
Precise Process Control – Automated monitoring ensures reproducible results.
Hygienic Design – Stainless steel chambers allow easy cleaning and long-term durability.
Flexible Production – Modular design supports batch or continuous operation.
Fruits: strawberries, blueberries, mangoes
Vegetables: peas, carrots, corn
Seafood, meat, and ready-to-eat meals
Coffee, tea, and instant beverage powders
Vaccines and injectable drugs
Biological materials, enzymes, and antibiotics
Microbial cultures
Probiotics
Laboratory reagents
Herbs, medicinal plants, and specialty crops
Energy-saving designs with optimized refrigeration and heating cycles.
Automated PLC/PC controls for precise temperature, vacuum, and cycle monitoring.
Scalable and modular systems for medium-to-large industrial operations.
Remote monitoring and process logging for quality control and regulatory compliance.
Freeze drying with LG type freeze dryers is a proven method for industrial lyophilization, delivering consistent product quality, long shelf-life, and energy-efficient operation. Their robust design, automated controls, and high-capacity performance make LG freeze dryers a preferred choice for food, pharmaceutical, biotechnology, and agricultural industries.
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