CVD-500 Vacuum Freeze Dryer | 5㎡ Shelf Area · 40~60kg per Batch · 12 Shelf Layers

CVD-500 vacuum freeze dryer has a shelf area of 5㎡, 12 shelf layers, a loading capacity of 4060kg per batch, a cold trap temperature of -45-65℃, and a freeze-drying cycle of approximately 25 to 30 hours per batch. After the material is frozen below its eutectic point, ice sublimates directly into water vapor under a vacuum environment of ≤15Pa, and is then captured by the cold trap through deposition—this is the class of equipment used by small and medium-sized food processing plants for batch freeze-dried fruit and vegetable crisps, freeze-dried pet food, and freeze-dried Chinese medicinal materials.

Where It Is Used

Loading capacity is calculated at a tray loading density of 8~12 kg/㎡. Actual loading depends on material density, cut thickness, and tray spreading method. For smaller specifications, see the vacuum freeze dryer series page.

How Drying Works

The cold trap (water vapor trap) operates at -45~-65℃ and is located at the rear of the drying chamber. The internal coil and refrigeration unit form a refrigeration cycle. During batch production, the amount of sublimated water vapor is large. The cold trap is responsible for depositing it into frost before the vapor enters the vacuum pump, which both protects the vacuum pump and continuously removes water vapor from the chamber.

Technical Parameters

Quick Specifications

Full Parameters

Main Configuration List

Why Choose It

• 40~60kg per batch, enough to support a small production line. 5㎡ shelf area with 12 layers; one freeze-drying batch is a sellable batch, suitable for categories requiring stable batch output such as fruit and vegetable crisps and freeze-dried pet food.
• Process parameters are fully consistent with the same series. Shelf temperature -55120℃, cold trap -45-65℃, ultimate vacuum level ≤15Pa. Compared with smaller models, only the shelf area is enlarged, so pilot test curves can be directly applied to batch production.
• Vacuum pumping speed matches batch sublimation. Roots pump + rotary vane pump two-stage unit; after the backing pump evacuates the chamber below 1 kPa, the Roots pump is automatically engaged. Even when water vapor generation is fast during the sublimation stage, it can be continuously removed without prolonging the cycle time.
• Total weight 2100kg, easy to arrange on the production line. Dimensions 3000×1500×1700mm; after receipt, it can be lifted into position on site; defrosting uses hot water spray, making inter-batch cleaning time controllable.

FAQ

How much fresh material can CVD-500 process per batch?

Batch processing capacity is 50kg, with a loading range of 4060kg, calculated at a tray loading density of 812kg per square meter. Finished product weight depends on the initial moisture content and target moisture content of the material, and is not the same figure as the input weight. To calculate loading capacity for a specific material, you can contact us with the material name, input weight per batch, and moisture content.

Can the 25 to 30 hours per batch be shortened?

Cycle time is determined by three stages: pre-freezing, sublimation drying (which takes up more than sixty percent of the time), and desorption drying. To shorten it, the usual approach is from the material side—cut thinner, spread more evenly, and reduce initial moisture content. Freeze-drying process parameters and eutectic point data can be found in the technical library. Adjusting the curve according to the material is more effective than simply increasing power.

Why does the freeze dryer vacuum system use Roots pump + rotary vane pump two-stage?

The Roots pump is a booster pump and cannot start alone. The backing rotary vane pump first evacuates the chamber below 1 kPa, then the Roots pump is automatically engaged, using high pumping speed to remove sublimated water vapor as quickly as possible. When the freeze-drying target is ≤15Pa, this Roots stage determines the drying rate, not whether vacuum can be achieved.

Does the chamber need insulation?

No. The drying chamber is SUS304 stainless steel. After freeze-drying is completed, discharge and packaging are carried out immediately; the equipment chamber is not insulated. Heat is mainly transferred to the material through the silicone oil circulation inside the shelves, not through the chamber space temperature.

How is the 16kW installed power calculated, and how much power should be provided on site?

In the technical parameters table, the installed power for this specification is 16kW, with power supply 380V/50Hz/3P. Different early proposal documents may have different total power figures when calculated item by item by component (including refrigeration, vacuum, heating, water pump, cooling tower, and other sub-items). On-site power distribution is confirmed according to the final technical proposal. During selection, you can provide the site power supply conditions and whether cooling water is required, and engineers will issue a power distribution list.

To calculate loading capacity, freeze-drying curves, or cold trap configuration by material, you can provide the material name, input weight per batch, and moisture content, and engineers will provide a selection plan.