Fluidized Bed Tunnel Freezer
For small particulate products, this tunnel does something a belt alone cannot: precisely controlled high-velocity cold air suspends each piece in a fluidized state, so every piece is surrounded by cold air and freezes individually — no clumping, no uneven cores.
- Tunnel
- −30°C to −40°C
- Freezing time
- 3–15 min typical pieces
- Tunnel length
- 5–20 m by output
- Best for
- Small, particulate products
Tunnel temperature −30°C to −40°C
How it is built
All-round freezing, piece by piece
Suspended in the air stream, each piece exchanges heat over its whole surface. Pieces freeze quickly and uniformly from surface to core, with minimal ice-crystal formation and intact cell structure — berries stay whole, shrimp stay separate, diced vegetables pour freely after freezing.
Fast by design
Tunnel temperatures sit between −30°C and −40°C. Typical small pieces freeze in 3 to 15 minutes; larger pieces take longer, and belt speed adjusts to the product.
Hygienic, cleanable construction
The tunnel is built in 304 stainless steel for food contact. Conveyor sections lift out for cleaning, and electrical components are shielded against water and damp.
Sized to your line
Tunnel length runs from 5 m upward (to 20 m for larger outputs); fan power is VFD-driven, and the refrigeration duty is matched to your material and throughput at quotation.
Specifications
| Tunnel temperature | −30°C to −40°C |
|---|---|
| Freezing time | 3–15 min for typical piece sizes (longer for larger pieces) |
| Tunnel length | 5–20 m, set to output |
| Drive | Variable-frequency fan and belt speed |
| Construction | 304 stainless steel food-contact surfaces |
| Best for | Peas, diced vegetables, berries, shrimp, scallops, diced fruit, cheese cubes, dough pieces |
Sizes and duties beyond the figures above are set against your product and output at quotation.
Used for
Questions
Small, free-flowing pieces: peas, diced carrots, broccoli florets, strawberries and blueberries, shrimp and scallops, diced fruit. If pieces should pour individually after freezing, this is the method.
At tunnel temperatures of −30°C to −40°C, typical small pieces freeze in 3 to 15 minutes. Larger pieces need longer; belt speed is set to the product.
The tunnel is sized to your line — length from 5 to 20 m and refrigeration duty matched to your product and target output. Send the product and hourly target and we will size it in the quotation.
The product, piece size, target output, and layout constraints. A quotation typically follows within one to two working days.
Related equipment
Tell us what you are freezing.
Send the product, target capacity, piece size and your layout constraints. A quotation typically follows within one to two working days.