CVD-3000 Production Vacuum Freeze Dryer — 30 m² Shelves · 300 kg/Batch

CVD-3000 is the large-batch model in Yuanxian’s production-type vacuum freeze dryer line. It has an effective shelf area of 30 m², a single-batch load of approximately 300 kg of fresh material, a shelf temperature range of -55~+120℃, a cold trap operating temperature of -45~-65℃, and a batch cycle from pre-freezing to discharge of approximately 12~20 hours. The material is first frozen into ice, then under vacuum the ice sublimates directly into water vapor, which is captured by the cold trap. Water leaves the material without passing through a liquid phase, so the finished product retains its original shape, color and flavor. It is suitable for freeze-drying production lines processing from several hundred kilograms to one ton of raw material per day, and belongs to the Yuanxian vacuum freeze dryer series.

Where it is used

How drying works

The entire freeze-drying process takes place in an oxygen-free vacuum environment, so the material does not oxidize or shrink. The no-load time from atmospheric pressure down to 133 Pa does not exceed 13 minutes. The rehydration rate of freeze-dried fruits and vegetables can reach 8595%, and the shelf life under sealed ambient conditions is 25 years.

Technical parameters

Quick specifications

Full parameters

Main configuration list

Why choose it

1. Large-batch capacity, 300 kg per batch. The 30 m² shelf area, combined with trays and material carts, allows a single load of approximately 300 kg of fresh material, suitable for production lines processing from several hundred kilograms to one ton of raw material per day.
2. Low-temperature sublimation, shape and color retained. Moisture sublimates directly in the form of ice crystals, so the finished product has an intact structure and can approach the fresh state after rehydration, with a shelf life of 2~5 years under sealed ambient conditions.
3. Combined vacuum and Bitzer refrigeration. The two-stage configuration of Roots pump plus rotary vane pump maintains the vacuum level stably at around 10 Pa; the Bitzer low-temperature water-cooled unit provides stable cooling capacity for the cold trap.
4. Fully automatic freeze-drying curve control. The Siemens PLC plus touch screen sets pre-freezing, primary drying and secondary drying in three stages, records multiple temperature channels in real time, and supports data export.

FAQ

How much freeze-dried finished product does one CVD-3000 batch yield?

Taking fruits and vegetables with a moisture content of about 90% as an example, 300 kg of fresh material generally yields 1530 kg of finished product after freeze-drying, with 9095% of the moisture removed. Actual output depends on the initial moisture content of the raw material, slice thickness and final moisture content requirement.

Why does the freeze-drying cycle vary so much?

The cycle is determined jointly by the material’s moisture content, slice thickness and loading density. Meat and high-sugar fruits require longer times; the thicker the slices and the denser the loading, the longer the sublimation drying stage. For the same equipment processing different materials, a cycle ranging from 12 hours to 20 hours is normal.

Does it need a separate quick-freezing unit?

Pre-freezing can be completed on the shelves inside the chamber, or the material can first be frozen in an external quick-freezing warehouse to below the eutectic point before being loaded into the chamber; the latter can improve equipment turnover. Whether to add one is determined by the production line rhythm.

Why does the vacuum system use a Roots pump plus a rotary vane pump?

Freeze-drying requires ice to sublimate under vacuum, and the target vacuum level needs to be stably maintained at around 10 Pa. The rotary vane pump is responsible for pumping from atmospheric pressure to rough vacuum, and the Roots pump takes over to boost pressure in the low-pressure range. Only the two-stage combination can stably maintain the vacuum level under large-batch loading.

How to choose between 30 m² and smaller models?

Choose according to single-batch load and daily processing volume. If the single-batch raw material volume is below 100 kg and the focus is on sampling or small batches, smaller models can be considered; if the single batch is around 300 kg and stable large-batch output is required, CVD-3000 is more suitable. The site also has smaller household and R&D freeze dryers for comparison.

To calculate loading capacity, freeze-drying curves and vacuum configuration for your material, welcome to contact us, or first visit the technical library to view freeze-drying process materials.