This water immersion retort is suitable for vacuum-packed food and flexible packages

Short Description:

A water immersion retort is a specialized thermal processing equipment widely used in the food, pharmaceutical, and beverage industries to achieve commercial sterility or pasteurization of packaged products. Its core principle involves submerging sealed containers (e.g., cans, jars, pouches) in a controlled water bath, then heating/cooling the water to uniformly transfer heat to the product—ensuring microbial safety while preserving quality.

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Ⅰ. Description

The water immersion retort features unique liquid flow switching technology for uniform internal temperature. Preheated hot water from a tank enables fast heating and sterilization, with hot water recycled post-process for energy efficiency.

Ⅱ. Advantages

Uniform water flow: Flow direction switching ensures vertical/horizontal uniformity, delivering water to each product tray’s center for dead-end-free sterilization.
HTST treatment: Preheated hot water enables high-temperature short-time sterilization.
Deformable container compatibility: Water buoyancy protects containers under high temperatures.
Large/high-viscosity food suitability: Rotation ensures even heating of large canned/high-viscosity foods, with water buoyancy safeguarding packaging during rotation.

Ⅲ. Working Principle

Load product baskets, close the door (locked via triple safety interlocks for full-process mechanical security). The PLC controls automatic sterilization per preset recipes:

Inject preheated hot water into the retort; circulate via high-flow pumps and optimized pipes.
Steam injection heats water for sterilization; flow switching ensures uniform heat distribution.
Programmed pressure control (via automatic air injection/discharge) adapts to 3-piece cans, 2-piece cans, flexible/plastic packages, etc.
Optional hot water recovery during cooling saves energy.
An alarm signals completion; unload for the next batch.

Temperature uniformity: ±0.5℃; pressure control precision: 0.05 Bar.