Frequently Asked Questions
Questions collected from our application guides, grouped by topic.
Freeze dryer selection
How long is one freeze drying cycle for fruit?
A typical fruit cycle runs 20–24 hours including freezing, sublimation and secondary drying. High-sugar or thick-cut products can take up to 30 hours.
Can one machine handle several fruit types?
Yes. Cycle recipes are stored in the PLC, so switching between products is a matter of selecting a program and changing tray loading.
Is vacuum cooling or freezing needed before drying?
Products are normally frozen in the chamber before vacuum is applied; pre-freezing in a blast freezer can shorten total cycle time.
Can the same machine process pet treats and human food?
The machine can, but food-safety practice is to keep separate tray sets and cleaning procedures for each product line.
Will freeze drying make candy crunchy?
Yes — removing moisture under vacuum creates the aerated, crunchy texture that freeze-dried candy is known for.
Are freeze-dried pet treats raw?
Freeze drying does not cook the product; it removes water, so nutrients and flavour stay close to raw while the product becomes shelf-stable.
Can I freeze dry liquids directly?
Yes — liquids are portioned into trays or containers and frozen before vacuum is applied.
What is the minimum order for a custom configuration?
Custom voltage and tray layouts are available from one unit; OEM branding often starts at a small batch.
How long does a custom machine take?
Standard machines ship in about 15 days; custom configurations typically take 15–30 days.
Batch capacity & trays
What residual moisture should freeze-dried fruit have?
Below 5 % residual moisture is the usual target for room-temperature shelf stability of 2–3 years.
How do I avoid fat oxidation during storage?
Aim for residual moisture below 5 % and pack with oxygen absorbers or nitrogen flushing for fatty products.
Does candy need a different tray?
Candy is usually run on mesh or perforated trays to improve vapour flow; ask for a tray option at order time.
Which products sell best?
Single-ingredient protein treats (liver, fish skin, chicken breast) are the most common premium lines.
Is milling needed after drying?
For powders, yes: dried product is milled to the target particle size after the cycle.
Vacuum & cold trap
What is a realistic daily output for candy?
Because water load is low, a 15–20 kg class machine can often complete two or more candy cycles per day depending on the recipe.
Can I run both dog and cat products?
Yes — recipes are stored per product, and separate tray sets keep allergen cross-contact controlled.
How is aroma preserved?
By keeping sublimation temperatures low and avoiding excessive secondary-drying heat.
Can you match an existing tray from another supplier?
Yes — send the tray drawing or sample dimensions and we will match the rack layout.
Drying cycle
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Site & power supply
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