Beer Filler Has High Dissolved Oxygen: Find the Air Ingress
Separate incoming beer oxygen from oxygen introduced during filling. Check deaerated-water and CO2 quality, tank purging, bottle or can pre-evacuation, counterpressure gas, turbulent flow, snift behavior and fill-to-close delay.
Stop automatic operation, isolate electrical and pneumatic energy, close and depressurize product circuits, and follow the machine lockout/tagout procedure before opening guards or removing a valve. Quarantine product made since the last confirmed good check.
Locate the fault
- Packaged beer oxygen is higher than the filler-inlet sample
- Results worsen after stops or low-speed running
- Only selected valves produce high readings
- Foam and long fill-to-cap delay accompany the increase
Inspection sequence
- Verify the oxygen instrument, sample technique and zero before comparing locations
- Take synchronized readings at filler inlet and finished package
- Plot results by filling head and operating state
- Check purge, evacuation and counterpressure sequences and gas quality
- Inspect product and gas circuits for leakage or unstable pressure
- Measure fill-to-close time and observe foam condition
Corrective work
- Restore validated container evacuation or CO2 purge
- Repair air ingress and ensure suitable gas quality and pressure
- Correct valve flow and snift behavior without compromising fill performance
- Reduce fill-to-close delay and restore stable closure application
Operating records and follow-up
- Trend oxygen pickup rather than only final package oxygen
- Verify instruments and sampling technique
- Leak-test gas circuits
- Qualify oxygen performance after valve service
- Include stop and restart samples in the control plan
Equipment details: Glass Bottle Beer & Beverage Filling Machine.
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