RalcoTechnic>Аrticles>Blast chilling: how it works and when it should be used

Blast chilling: how it works and when it should be used

09.12.2025

Blast freezing is a critically important technology for enterprises that work with large volumes of vegetables, fruits, meat, fish, berries, seafood, and semi-finished products. The correct approach to freezing determines not only the appearance of the product, but also its quality, safety, and ability to retain its properties after thawing.
Ralco designs and manufactures industrial blast freezing chambers tailored to specific production requirements and operational conditions.

How blast freezing technology works

During blast freezing, the product quickly passes through the critical temperature zone from –1 °C to –5 °C, where large ice crystals normally form under conventional freezing.
The systems we design ensure:

intensive airflow at low temperatures,
high air velocity for uniform freezing,
formation of only microcrystals that do not damage the product’s structure,
rapid and stable achievement of the required core temperature.

This allows the product to maintain its structure, color, nutritional value, and commercial appearance — even with high daily freezing volumes.

Where blast freezing chambers are needed

Fruit and vegetable processing
Rapid stopping of enzymatic activity and maximum retention of natural properties.
Meat and poultry processing
Uniform crystallization without loss of juiciness or weight during subsequent thawing.
Fish processing industry
Delicate fish and seafood fibers require blast freezing to preserve quality.
Seafood production
Retention of appearance and texture, even for the most sensitive products.
Semi-finished and frozen products
Stable product quality with precise preservation of shape and structure.

Advantages of Ralco blast freezing chambers

Custom engineering
Each chamber is designed based on real operating conditions, product type, required capacity, and the facility’s available space.

Energy-efficient solutions
We use modern refrigeration units, optimized aerodynamics, and automation systems that reduce energy consumption while maintaining high performance.

Stable technological modes
Intelligent control systems regulate temperature, airspeed, and freezing cycles — ensuring predictable and repeatable results.

Structural reliability
High-quality components and well-engineered construction ensure durability and uninterrupted operation.