What are the critical preparation steps and acceptance criteria for the Factory Acceptance Testing (FAT) of a custom bottled water filling line?

Direct Conclusion: Successful Factory Acceptance Testing (FAT) for a custom bottled water filling line requires verifying that the equipment meets the specific capacity, bottle compatibility, and filling stability criteria defined in the technical agreement, rather than just checking maximum theoretical speeds.

Preparation Checklist & Acceptance Criteria:

1. Capacity and Material Balance Verification: Do not simply convert the rated bottles/hour into finished water volume. The FAT must validate the integrated material balance, accounting for bottle washing water, CIP cleaning, equipment flushing, and peak buffering. Ensure the raw and finished water tanks can handle short-term fluctuations during the test run.
2. Bottle Compatibility and Speed Calibration: Filling time, liquid flow, bottle stability, and downstream packaging rhythms vary significantly across different volumes (e.g., 500 mL, 1.5 L, or 18.9 L barrels). The FAT must test the specific bottle types and capacities agreed upon, avoiding reliance on generic 500 mL benchmark speeds.
3. Filling Stability and Level Consistency: During continuous operation, monitor filling level consistency. If fluctuations occur, the acceptance protocol should distinguish between systemic issues (checking supply liquid level, pressure, temperature, foam, and return flow) and individual valve anomalies (checking specific filling valves, seals, sensors, and bottle positioning).

Cross-Team Collaboration & Boundaries:
FAT requires coordination between procurement, operations, and maintenance teams. Operations leads must verify the PLC fault alarms and HMI interfaces, while maintenance teams should assess the accessibility of the washing-filling-capping monoblock for routine servicing. Note that FAT validates the equipment under factory conditions; final site-specific utility engineering and cleanroom integration (such as ISO Class 8 clean air systems) will be verified during the Site Acceptance Testing (SAT).

Next Steps:
Before scheduling the FAT, submit your finalized bottle drawings, cap specifications, and water quality reports to the engineering team. Confirm the exact scope of the test, including which auxiliary systems (like NF spring water equipment or ozone sterilization) will be simulated or physically integrated during the factory run.