Aseptic filling machine

01

Prove container sterilization and respond to loss of sterility

US regulations for aseptic food processing and packaging (21 CFR 113.40(g)) require the container and closure sterilization system and the filling and closing system to be instrumented to show that sterilization is achieved continuously, with recording of sterilant flow, temperature, concentration or other factors; a timing method for container retention in the sterilant with protection against unauthorized speed changes; and both systems brought to commercial sterility before packaging starts. [1]

If packaging conditions fall below the scheduled process, the system must stop packaging or segregate the product, for example by diverting product away from the filler or stopping containers entering, and must be returned to commercial sterility before restarting. Operating conditions should be recorded at intervals not exceeding 1 hour, critical factors at intervals not exceeding 15 minutes, and incubation tests run on samples from each code. [1]

One maker's bag-in-box aseptic filler (Jiangsu Lazen, single-head BIB) shows how a food filler keeps the filling zone sterile in practice: pre-sterilized aluminium-plastic composite aseptic bags of 1–50 L are uncapped, filled and recapped by a mechanical hand inside an aseptic chamber that is held sterile with steam; the flexible joints of the product pipe carry steam shields, a condensate collector prevents drips, and metering is by weighing or by flow meter. Product-contact construction is SUS304 or 316L stainless steel. [3]

Editorial note: for a steam-barrier filler, ask how steam temperature at the filling head and the shielded joints is measured and recorded, so that the records required for container and filling-zone sterilization can be produced from the machine. [3] [1]

Give the supplier the product and its sterilization, package type and size, output, container and closure sterilant and method, sterile-zone design, CIP/SIP, records and data integrity needs, the regulations to meet, and validation support required.

02

Use the sterile-medicine Grade A zone as a reference for clean air

EU GMP Annex 1 (2022) for sterile medicinal products defines Grade A as the critical zone for high-risk operations such as aseptic filling; Annex 1 names localised airflow protection, such as unidirectional airflow workstations within RABS or isolators, as the means of providing these conditions. Grade A allows at most 3,520 particles of 0.5 µm or larger per m³ both at rest and in operation, and unidirectional airflow should give a homogeneous 0.36–0.54 m/s at the working position unless otherwise justified. [2]

Editorial calculation: 3,520 particles per m³ is about 3.5 particles per litre of air, and 0.36–0.54 m/s over 1 m² of filling zone moves about 1,300–1,940 m³ of filtered air per hour. [2] Food fillers are governed by their own rules and scheduled process; ask the supplier which air class and airflow the sterile zone is designed and qualified to.

03

Compare packaging-material sterilants by log reduction

US patent 4,494,357 A, assigned to International Paper Co (priority 1981), challenged polyethylene-coated paperboard with a 10⁸ Bacillus subtilis var. niger spore inoculum per site and measured log reductions for the sterilants used on aseptic packaging material. Immersion for 10 s in 30% hydrogen peroxide alone gave a 0.7 log reduction and heat alone 0.9; peroxide followed by heating for 9 s to below 100 °C, a limit set to avoid melting the polyethylene layer, gave 5.8. High-intensity UV-C at 254 nm gave 2.9–3.4 log, and the patent's method, 15 s of 20 kHz sonication at 6.5–7 W followed by 15 s of UV-C at 6 in from the lamp, gave 5.3–5.4, averaging 5.1 over five days. Reversing the order, UV then sonication, gave 2.8. [4]

Editorial calculation: a 5.8 log reduction leaves about 1.6 survivors per million spores on the surface, and 5.1 log about 7.9 per million. The patent's tables show final loads of 8.71 × 10² and 8.24 × 10² spores for these two treatments, so neither reached zero survivors. The order of steps mattered as much as the agents: sonication before UV-C gave 2.5–2.6 log more than after it. [4]

Editorial note: ask the filler supplier which sterilant, concentration, temperature and contact time it uses on your packaging material, which test organism and challenge level it validated against, and the log reduction achieved, so the figures can be tied to the records required under 21 CFR 113.40(g). [4] [1]

04

Beverage lines, bag-in-box, pouch and sachet fillers

Tech-Long and Victorystar list bottled-beverage aseptic lines, Lazen lists bag-in-box and bag-in-drum fillers, and Mingjia and Zhongrui list pouch and sachet fillers.

Tech-Long lists aseptic filling lines for bottled beverages; Victorystar lists double-head aseptic fillers with UHT sterilizers; Lazen lists bag-in-box and bag-in-drum aseptic fillers; ZenoPack, Jump, Triowin and Golden Feedmill list aseptic fillers with fruit and food processing lines; Mingjia lists aseptic and spout-pouch fillers; Zhongrui lists dual-channel aseptic fillers for sachets.

05

Sterilizer, sterile zone, filling valves, speed lock and divert logic

Three of the five rows come straight from 21 CFR 113.40(g); the sterile zone row draws on Annex 1 and the Lazen bag filler.

06

Package size, speed, accuracy and sterilization conditions for the quotation

Product, package and output come from your line. Only the package size, accuracy and sterilization rows carry published references here; the rest must come from the supplier.

07

Send the product, package and sterility data together

Paste it into your enquiry below or into an email to a maker, then replace every bracket.

Product: [type; viscosity; particulates; sterilization method]
Package: [bottle, pouch, bag-in-box or drum; size; closure]
Output: [containers per hour]
Sterility: [container sterilant; zone design; CIP/SIP]
Records: [sterilant flow, temperature, concentration; data logging]
Compliance: [regulations; validation support]

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