FAQ

Q1: What is a freeze dryer and how does it work?

A: A freeze dryer is a device that removes water from materials through the principle of "freezing + vacuum sublimation". The material is first rapidly frozen to a low temperature, turning its water content into ice. Then, under a vacuum, the ice sublimates directly into water vapor, which is captured by a low-temperature condenser (cold trap), thus achieving drying. This process maximally preserves the product's shape, color, nutritional components, and active substances.

Q2: What is the difference between a freeze dryer and a traditional dryer?

A: A traditional dryer removes moisture by heating and evaporating water, which may destroy nutrients, flavor, or structure.
A freeze dryer uses low-temperature sublimation, allowing the product to retain its natural quality, color, aroma, and nutrients.
Therefore, freeze drying is widely used in food, pharmaceuticals, biological products, cosmetics, and other high-value industries.

Q3: What materials can be processed with a freeze dryer?

A: Food: fruits, vegetables, meat, seafood, liquids (coffee, soups), ready-to-eat meals, pet food, snacks, candy, yogurt
Biological/Pharmaceutical: medicines, bacteria, vaccines, enzymes, blood products
Cosmetics/Plant Extracts: collagen, herbal extracts, active ingredients
Research/Testing: tissue samples, microorganisms, powders, lab materials

Q4: What models of freeze dryers do you offer, and how do I choose the right one?

A: We provide four main categories:
Household Series: RFD, DFD, HFD, SFD – simple operation, suitable for homemade freeze-dried food.
Lab Series: LFD – suitable for laboratory research
Pilot Scale: PFD – ideal for R&D institutions and small-scale trial production
Industrial Scale: BSFD, BTFD, BBFT – large-scale commercial production
Selection depends on: material type, batch capacity, chamber size, cold trap temperature, vacuum level, and process requirements.
We can provide model selection advice and solution design based on your needs.

Q5: Is the equipment difficult to operate? Do you provide training?

A: Operation is very user-friendly. We offer detailed manuals and online training.
Household models: feature one-touch start with fully automatic programs, and also allow for custom recipes.
Lab/Pilot/Industrial models: equipped with touchscreen interfaces and programmable control systems (PLC + HMI).

Q6: How long does the freeze-drying process take?

A: The duration depends on material type, moisture content, thickness, loading quantity, and temperature settings.
General reference:
Fruits / vegetables: 12–24 hours
Meat / pet food: 18–30 hours
Pharmaceuticals / biological samples: 24–48 hours
We can help optimize your freeze-drying formula for better efficiency.

Q7: What is the typical temperature range of a freeze dryer?

A: Cold Trap Temperature: –35°C to –80°C
Shelf Temperature: –40°C to +60°C
(Customization available based on model requirements)

Q8: Does a freeze dryer consume a lot of electricity?

A: Power consumption varies by different model.
The listed power in the technical sheet represents the installed power (kWh).
Typical actual operating power:
HFD: approx. 90% of installed power
RFD: approx. 75% of installed power

Q9: What is the warranty period? Do you provide technical support?

A: One-year warranty for the whole machine (excluding consumables and human factors)
Provide lifetime technical support, including remote diagnosis, video training, and full spare-part supply

Q10: Do you offer customization?

A: Yes. We can offer personalized customization based on customer requirements regarding material characteristics, batch output, equipment dimensions, control systems, etc..

Q11: How are the machines shipped and installed?

A: Small models: shipped fully assembled; ready to use after connecting to power.
Large models (BSFD / BTFD series): modular shipment with remote or onsite installation guidance by our engineers

Q12: How should freeze-dried products be stored?

A: They should be stored in sealed, moisture-proof packaging (such as vacuum bags, aluminum foil bags). If stored properly, they can be stable at room temperature for 1-2 years.

Q13: Which countries do you export to?

A: Our freeze dryer has been exported to numerous countries and regions including the USA, Canada, Germany, Russia, Australia, South Korea, Southeast Asia, and the Middle East. We have extensive international trade experience and multiple certifications.

Q14: Can I see machine operation videos or customer cases?

A: Absolutely. We can provide demonstration videos, factory tours, customer cases, and application reports to help you evaluate performance.

Q15: How can I get a quotation?

A: Please tell us:
Material type
Required batch capacity
We will recommend the appropriate model and send you a quotation within 8 hours.