Automated Cryogenic Fish Freezing Tunnel System

Product Specifications

Technical details and manufacturing context for Automated Cryogenic Fish Freezing Tunnel System

Definition

The Automated Cryogenic Fish Freezing Tunnel System is a complete industrial freezing solution designed for facilities that process fish, crustaceans, and molluscs. It employs cryogenic gases, typically liquid nitrogen or carbon dioxide, to achieve ultra-fast freezing rates that preserve cellular structure and product quality. The system integrates material handling, temperature control, and monitoring subsystems into a coordinated production line, making it suitable for B2B seafood processors who supply frozen products to retailers, food service, and further processing industries.

The system operates as an insulated tunnel through which products move on a conveyor belt. Inside, a controlled spray or vapor of cryogenic gas rapidly extracts heat, bringing the product core to a target temperature of -18°C. Key parameters include a freezing rate of 500–2000°C/min, tunnel operating temperatures of -40 to -80°C, and a conveyor speed range of 0.5–5 m/min. The tunnel length ranges from 6 to 20 meters, with belt widths of 600–1200 mm. Cryogen consumption is 1.2–2.5 kg per kg of product, and electrical power requirements are 15–45 kW. Temperature uniformity across the belt is ±2°C, and insulation thickness is 150–200 mm of food-grade polyurethane. The system is constructed with stainless steel 304/316L for food contact, and the enclosure is rated IP54–IP65 for washdown environments. Operating pressure is 1.0–1.6 MPa, and the system weight ranges from 3000 to 8000 kg depending on configuration.

This directory entry provides reference values that must be verified with the legal manufacturer or supplier for specific models and applications. The system is not a generic product; it is engineered to meet the hygiene and performance demands of seafood processing. Buyers should confirm all parameters, including material grades, standards compliance, and installation requirements, before procurement.

Working Principle

The system operates as an insulated tunnel through which fish products move on a conveyor belt. Inside the tunnel, a controlled spray or vapor of cryogenic gas (typically liquid nitrogen or carbon dioxide) is released, rapidly extracting heat from the product surface and core. The ultra-low temperatures (-40 to -80°C) and high heat transfer rates achieve freezing rates of 500–2000°C/min, preserving cellular structure and quality. The conveyor speed is adjustable (0.5–5 m/min) to control residence time, and the tunnel length (6–20 m) determines overall capacity. Temperature uniformity across the belt is maintained within ±2°C. The system includes monitoring and control subsystems to ensure consistent operation.

Common Materials

Stainless Steel 304/316, Food-Grade Polyurethane Insulation, Aluminum Conveyor Components, Tempered Glass Viewports

Technical Parameters

Parameter	Typical range	Notes & selection driver
Freezing RateRequired	500–2000 °C/minute	Average temperature drop rate in product core
Final Product TemperatureRequired	-18 °C	Target core temperature after freezing cycle
Cryogen ConsumptionRequired	1.2–2.5 kg/kg_product	Mass of cryogenic gas used per mass of frozen product
Conveyor Speed RangeRequired	0.5–5 m/min	Adjustable speed range of the main conveyor belt
Tunnel Operating TemperatureRequired	-40–-80 °C	Controlled temperature range inside freezing chamber
Electrical Power RequirementRequired	15–45 kW	Total connected electrical load for motors and controls
Tunnel Length	6–20 m	Determines residence time
Belt Width	600–1200 mm	Standard widths available
Temperature Uniformity	±2 °C	Across the belt width
Insulation Thickness	150–200 mm	Polyurethane foam, high efficiency
IP Rating	IP54–IP65	For washdown environmentsIEC 60529
Material Grade	304/316L	Stainless steel for food contactASTM A240
Weight	3000–8000 kg	Depends on length and options

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Insulated Freezing Tunnel
Main chamber where cryogenic freezing occurs

Material: Stainless steel with polyurethane insulation
Cryogenic Spray System
Distributes liquid cryogen evenly throughout tunnel

Material: Stainless steel nozzles and piping
Variable Speed Conveyor
Transports product through freezing cycle at controlled rate

Material: Food-grade stainless steel and plastic
Temperature Control Unit
Monitors and regulates tunnel temperature zones

Material: Electronic components in stainless enclosure
Exhaust Gas Management Optional
Removes spent cryogenic vapor from tunnel

Material: Stainless steel ducting

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Automated Cryogenic Fish Freezing Tunnel System.

Manufacturers of Automated Cryogenic Fish Freezing Tunnel System

Manufacturer profiles associated with Automated Cryogenic Fish Freezing Tunnel System.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 6 September 2026

Procurement Evaluation Criteria

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Technical documentation

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Frequently Asked Questions

What types of products can be frozen in this system?

The system is designed for fish, crustaceans, and molluscs. It is suitable for whole fish, fillets, shrimp, and other seafood products that require rapid freezing to preserve quality.

What is the typical freezing rate and final product temperature?

The freezing rate is 500–2000°C/min, and the target core temperature after the freezing cycle is -18°C. These values are reference ranges and must be confirmed for the specific model and product.

What are the utility requirements for this system?

The system requires a cryogen supply (liquid nitrogen or CO2), electrical power of 15–45 kW, and a compressed air supply if pneumatic controls are used. Water may be needed for cleaning. Exact requirements depend on the configuration.

How is temperature uniformity maintained across the belt?

The system is designed to maintain temperature uniformity within ±2°C across the belt width. This is achieved through controlled gas distribution and insulation. Verification should be performed during commissioning.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0.5-2.0 bar (operating pressure for cryogen injection)
flow rate:	10-100 m³/hr (tunnel air/cryogen flow)
belt speed:	0.1-2.0 m/min (adjustable for freeze time)
temperature:	-196°C to -40°C (LN2 or CO2 cryogenic range)
product throughput:	100-5000 kg/hr (capacity range)
slurry concentration:	Not applicable (dry freezing process)