No DramaBuyer guide · Food & candy
Commercial covers everything from a 220 V cabinet to a 10 m² chamber drawing tens of kilowatts, and most quotes give a batch weight in wet kilograms that tells you neither how much dry product you get nor how long a cycle takes.
01
Batch kilograms is a loading figure the seller chose. Shelf area is the physical fact. Spec tables we read load 10 to 15 kg of wet product per m², so one chamber can be sold as 100 kg or 150 kg. Compare shelf area, shelf count and tray size.
Fluid-heated conductive shelves, radiant plates or electric heater mats. Fluid shelves heat the stack more evenly; mats run cooler at the edges. Ask for the stated uniformity across shelves and how it was measured.
The cold trap must hold all the water a full batch releases. One 10.5 m² spec sheet states 200 kg of ice capacity for a 100 kg batch. If ice capacity is missing from the quote, expect cycles to stall when the trap fills.
The refrigerant decides whether a local contractor can service the unit under EU rules. One spec table names R404A. Get refrigerant, charge and compressor make in writing.
Oil-sealed rotary vane, with or without a Roots booster, or a dry pump. Ask for make, pumping speed and the guaranteed ultimate vacuum with an empty chamber.
Smaller units freeze on the shelves; larger ones expect product frozen in a separate blast freezer. A quote that assumes an external freezer has left a second machine unpriced.
A timer on a touchscreen differs from a PLC that stores recipes and logs shelf, product, condenser temperature and chamber pressure to an exportable file. Without that file you cannot prove a batch to an auditor.
Two spec tables for chambers of about 10 m² state 40 kW and 63 kW installed. Ask whether the condenser is air-cooled or needs a chiller. Water-cooled with no chiller quoted is incomplete.
02
Model numbers look comparable and are not. In one series the number is batch kilograms; in another it is shelf area. Read the spec table behind every code.
03
Send these with the enquiry. Without them, any number a factory gives you is a guess dressed as a quotation.
04
| Require this | A pass looks like |
|---|---|
| A full batch of your product, cut as you will cut it, loaded to the quoted shelf area, through one complete cycle. | Cycle time within the quoted range, and end moisture on samples from top, middle and bottom shelves at or below target. |
| Export of that batch's cycle log. | A file you can open with shelf, product and condenser temperatures and chamber pressure for the whole cycle, no gaps. |
| Empty-chamber pull-down before the batch. | Condenser temperature and ultimate chamber pressure reached within the times written into the contract. |
| Weigh product in, product out and the defrost water. | Water removed matches the product's known water content. A large shortfall means product left wet. |
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A hot-air food dehydrator, which dries in hours rather than a day at far lower energy per kilogram.
An industrial freeze dryer with trolley loading and a separate blast freezer.
Rent time at a contract freeze-drying facility, then size the machine from your own cycle data.
07
We name the kind of source, how many and when, and never the factory. Listed prices are asking prices, not landed cost. Where we do not hold a fact we say so: that is a GAP, not an estimate.
08
Every machine we source in this area is on the Food & candy page. How a project runs, stage by stage, is on how it works, and what it costs is on pricing.
Straight answers
The chamber can be similar. The differences are refrigerant, compressor, pump, controller, log and service. Before ordering an imported machine, confirm a local contractor will commission and service that refrigerant and compressor.
Shelf area against the quote, shelf uniformity, condenser pull-down, empty-chamber vacuum, refrigerant label, pump and compressor makes against the contract, finish on product-contact parts, and one full cycle with your product and an exported log.
An EU Declaration of Conformity for the serial number, backed by a technical file, under the machinery rules plus 2014/35/EU and 2014/30/EU, and a food-contact declaration under Regulation (EC) 1935/2004. A CE mark on a brochure proves nothing.
Whoever places it on the EU market, usually you when buying direct. Your name and address go on the machine or its documents, and you must check the conformity documentation exists and matches the machine.
Whether the factory builds its own chambers and refrigeration, whether it can show logs from delivered machines, and whether a test bay can run your product.
Listed asking prices run from a few thousand dollars for 220 V cabinets to hundreds of thousands for large chambers, and most listings give no shelf area. Compare only quotes stating shelf area, power, refrigerant and pump. Asking prices are not landed cost.
Contact
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