Supermarket & Retail
Refrigeration for seafood processor and exporter
Seafood processing and export plants run on blast freezers, plate freezers, ice plants and large cold stores, and those are engineered to the plant. Alongside that core, there are jobs where standalone cabinets fit better: holding premium species such as tuna for the sashimi market at ultra-low temperature, keeping retained samples from each lot for quality checks and buyer queries, and running the quality-control lab's chilled storage. These cabinets are small compared with the plant, but they protect high-value product and the documentation buyers ask for during audits.
What the equipment has to cope with
- Premium tuna destined for raw consumption loses its red colour at ordinary frozen-storage temperatures; holding colour needs ultra-low storage of around −60 °C.
- Retained samples from every lot must be stored and traceable, often for long periods, without taking up cold-store space or getting mixed in with production stock.
- Coastal plants face salt air and high humidity, which corrode condensers and exterior fittings.
- QC labs need stable chilled storage for samples awaiting testing and for reagents, separate from production product.
- Export buyers and inspectors expect temperature records and documented procedures for every stage of the cold chain.
Typical temperatures
| Sashimi-grade tuna | About −60 °C |
|---|---|
| Frozen shrimp, fish blocks, fillets | −18 °C or colder |
| Retained frozen lot samples | −18 °C or colder |
| Chilled raw material on ice | 0 to +2 °C |
| QC samples awaiting testing | +2 to +4 °C |
Equipment
What to buy, and why.
In a processing or export plant, standalone cabinets usually sit in three places: ultra-low chest freezers in a dedicated area for premium tuna or other species where colour and quality need −60 °C; hard-top chest freezers for retained lot samples, labelled and logged; and stainless reach-ins in the quality-control lab for chilled samples and reagents. Keep ultra-low freezers in a ventilated room, because they reject a lot of heat, and give them backup power. In coastal plants, protect cabinets from salt-laden air and washdown spray.
- −18 to −60 °CDeep FreezerUltra-low chest freezers that hold sashimi-grade tuna and other premium species at about −60 °C, and hard-top freezers for retained lot samples at −18 °C or colder.Set-up guide
- +2 to +8 °CReach-in RefrigeratorStainless uprights in the quality-control lab for chilled samples awaiting testing, test kits and reagents, kept apart from production product.Set-up guide
Questions
- Why does sashimi tuna need −60 °C storage?
- At ordinary frozen temperatures such as −18 °C, the red pigment in tuna muscle gradually oxidises and the flesh turns brown even though it is still frozen. Holding it at around −60 °C slows that change dramatically, which is why sashimi-grade tuna is commonly stored ultra-cold. Ordinary frozen seafood does not need it.
- Can a −60 °C chest freezer replace a cold store?
- No. An ultra-low chest freezer is for small volumes of high-value product or samples. Bulk frozen storage belongs in an engineered cold store, and freezing itself belongs in blast or plate freezers. A chest freezer holds product that is already frozen.
- How should retained samples be stored?
- Store them in a dedicated freezer, separate from production stock, at −18 °C or colder. Label each sample with lot, date and product, log what goes in and out, and follow the retention period your buyers and inspectors require.
Before you buy
All guides- Commercial Refrigerator Maintenance Checklist6 min read
- Commercial Refrigerator Buying Guide (India)9 min read
- Visi Cooler Buying Guide: Size, Glass, Placement6 min read
- Types of Commercial Refrigerators Explained6 min read
- Visi Cooler for Kirana & FMCG Shops: What to Know5 min read
- Open Multideck Merchandiser Guide for Supermarkets6 min read
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