Sterilizer and Pasteurizer
LWT offers sterilizers and pasteurizers tailored for various packaging formats including glass bottles, cans, containers, and flexible pouches.
Water Bath Sterilizer
Continuous Sterilization Machine for Cans, Glass Jars and Bottled Food Products
Providing 360° uniform heating and continuous cooling for bottled or canned foods to achieve precise pasteurization up to 98°C.
The water bath sterilizer is made of 304 stainless steel and equipped with a hot water tank, cooling water tank, automatic steam heating system, hot water pump, and circulation pump. Using continuous roller conveying, the system provides uniform heat treatment for glass jars, canned foods, condiments, and other packaged products.
After sterilization, the machine automatically completes cooling and drying processes, ensuring continuous, stable, and hygienic operation. It is widely used in canned food and condiment production lines requiring reliable thermal processing and efficient production.
Water Bath Pasteurizer with Roller Conveyor
The continuous water bath pasteurizer is made of 304 stainless steel, with customizable tank dimensions and a maximum operating temperature of up to 98°C.
The roller bar conveying system rotates round bottles and cans during processing, enabling 360° uniform heating and improving heat penetration efficiency. This design effectively reduces uneven sterilization and insufficient core temperature issues commonly found in traditional systems.
The machine is suitable for glass bottles, tinplate cans, and large round containers over 3 kg, and is widely used for thermal processing in canned food, beverage, pickled vegetable, and condiment production lines.
Tunnel Water Spray Pasteurizer
The tunnel water spray pasteurizer is a continuous thermal processing system designed for efficient and flexible production. It uses high-pressure hot water spraying to distribute heat evenly across the surface of packaged products, with precise temperature and processing time control.
The system helps minimize package deformation and damage during heat treatment while ensuring consistent sterilization performance. With wide packaging compatibility and low energy consumption, it is suitable for food, beverage, pharmaceutical, and condiment production applications.
The spray pasteurization system can be integrated with filling machines, air drying systems, labeling machines, and case packers to create a complete automated production line. It supports various packaging formats, including pouches, rigid containers, round bottles, square bottles, and other packaged products.
| Comparison | Water Bath Sterilizer | Water Bath Pasteurizer with Roller Conveyor | Tunnel Water Spray Pasteurizer |
| Conveying & Sterilization Method | Uses roller conveying combined with water bath heating. The rollers rotate round bottles and cans during processing, achieving 360° uniform heating. | Uses mesh belt or chain conveyor systems to move products continuously through hot water zones for thermal sterilization. | Uses mesh belt conveying with circulating hot water spray to distribute heat evenly across product surfaces. |
| Applicable Packaging Types | Designed for round-shaped containers, including glass bottles, round cans, tinplate cans, and other cylindrical packages. | Suitable for canned foods, glass jars, and rigid packaged products. Not recommended for lightweight packages that may float during processing. | Offers wide packaging compatibility and is suitable for pouches, rigid containers, round bottles, square bottles, and other irregular package formats. |
| Energy Consumption & Water Efficiency | Provides balanced energy consumption. Product rotation improves heat transfer efficiency and helps optimize sterilization performance. | Requires a larger volume of hot water for immersion processing, resulting in higher water circulation and heating requirements. | Uses circulating spray water systems to reduce water consumption and improve energy efficiency during continuous operation. |
| Product Protection | Product rotation during conveying creates slight contact with rollers, making it less suitable for packages with highly sensitive surfaces. | Provides gentle heat treatment for conventional canned products. Additional considerations are required for lightweight or floating packages. | Provides gentle thermal treatment without immersion impact, making it suitable for soft packaging and thin-wall containers. |
| Sterilization Uniformity | Rotating containers achieve 360° heat distribution, improving temperature uniformity and heat penetration, especially for large round cans and products requiring enhanced thermal transfer. | Provides stable heat transfer through hot water immersion and is suitable for continuous sterilization of conventional canned food products. | Multi-directional hot water spraying ensures uniform heat distribution and is suitable for various packaging formats and product types. |
The pasteurising machine can be customized according to actual production requirements, including product specifications, capacity, and pasteurization or sterilization process.
| Pasteurization / sterilization temperature | Standard model: 65–98°C for pasteurization |
| High-temperature model: 100–121°C for pressure sterilization | |
| Temperature control accuracy: ±0.5°C | |
| Pasteurization / sterilization time | 10–30 minutes, stepless adjustable |
| Cooling time | 8–30 minutes |
| Processing capacity | Standard model: 800–6000kg/h |
| High-speed model: 6000–25000kg/h | |
| Equipment length | 8–25m, customizable |
| Material | SUS304 / SUS316L stainless steel |
| Safety protection | Automatic alarm and shutdown for over-temperature, over-pressure, water shortage, and steam shortage |
