PRODUCT DETAIL · P.02
Double-Layer Water Bath Retort
Energy-saving double-layer water-bath retort for uniform pouch & can sterilization.
Overview
The double-layer water-bath retort uses an upper hot-water vessel to pre-heat process water, enabling rapid, uniform sterilization with lower energy and water consumption. Its gentle, even heating protects product quality — ideal for flexible pouches, cans and jars. Recirculating hot water surrounds every package for consistent heat penetration, while the upper pre-heat tank slashes cycle time and steam usage versus single-vessel designs. A PLC manages multi-stage recipes (heat → hold → cool) with documented F-value, making it well suited to plants running delicate or heat-sensitive formats at high daily volumes. Known in Chinese as 双层水浴式杀菌釜, this energy-saving 食品杀菌设备 is a staple 高温灭菌 solution for pouch and can processors.
Working Principle
The upper vessel pre-heats a charge of process water to the set temperature. At cycle start, the hot water is transferred into the lower sterilizing vessel to flood the product baskets, then continuously recirculated by a pump to keep temperature uniform across all packages. After the hold, cooling water is introduced under counter-pressure to bring the product down safely without shocking flexible packaging. The upper vessel then re-heats water for the next batch, cutting cycle time and steam use.
Control System
PLC + HMI with multi-stage recipe storage (heat → hold → cool), real-time temperature and pressure control, F-value calculation and logging, counter-pressure management, and batch archiving. Recirculation pump and valve sequencing are automated per recipe.
Specifications
- Model (example)
- YTY-SY-1000 (customizable)
- Capacity
- 150–2,500 baskets/batch
- Vessel volume
- 500–8,000 L (built to order)
- Temp. range
- 50–135°C
- Working pressure
- 0–0.5 MPa
- Temp. uniformity
- ±0.5°C
- Control system
- PLC + HMI, F-value
- Material
- SUS304 (316L optional)
- Heating mode
- Hot-water recirculation
- Steam consumption
- ~30% lower than single-vessel
- Applicable packaging
- Flexible pouches, cans, glass jars, bottles
Representative Models
| Model | Key parameters |
|---|---|
| YTY-SY-500 | 500 L · 2 baskets · 121°C · 12 kW |
| YTY-SY-1000 | 1,000 L · 4 baskets · 135°C · 15 kW |
| YTY-SY-2500 | 2,500 L · 8 baskets · 135°C · 22 kW |
Note: Representative specifications — capacity and vessel size are built to order. Send your packaging format and hourly target for a model recommendation and energy estimate.
Key Features
- Upper pre-heat vessel reduces cycle time and energy use
- Recirculating hot water for uniform heat distribution across all baskets
- Soft, even heating protects flexible pouches and glass containers
- Stainless construction with smooth welds, easy to clean
- PLC + HMI with multi-stage recipe storage and F-value logging
- Low water and steam consumption per cycle
- Counter-pressure control prevents pouch swelling and jar breakage
- Optional heat-recovery loop to further cut operating cost
Applications
FAQ
- Q01Why is it more energy-efficient than a single-vessel retort?
- The upper vessel pre-heats process water between batches, so each cycle starts hot and uses roughly 30% less steam than a single-vessel design.
- Q02Is it suitable for flexible pouches?
- Yes — the gentle, even hot-water heating and counter-pressure control protect pouches from swelling and glass from breakage.
- Q03How uniform is the temperature?
- Continuous recirculation keeps ±0.5°C uniformity across all baskets, verified before shipment.
- Q04Can it log F0 value?
- Yes — the PLC records F0 and full batch data for traceability and audit.
- Q05What capacity options are available?
- Vessels from 500–8,000 L are built to order. Send your packaging format and hourly target for a model recommendation.
Ready to specify this equipment?
Send us your product details and target capacity for a tailored solution and technical proposal.