Big Bag Filling Machine
Application Challenge
ProteSul Ingredients S.A. is a leading Brazilian producer of soy protein isolate (SPI 90%) and soy protein concentrate (SPC 70%), supplying food and beverage manufacturers across the EU and South America. As EU importers tightened protein quality requirements under FSSC 22000, ProteSul needed to replace their open-top bag filling station with a food-grade big bag filling machine capable of nitrogen-flush atmosphere inside the FIBC to protect oxidation-sensitive protein compounds during filling and sealed transport.
The procurement team assessed five big bag filling machine manufacturers before selecting HEMUfill for its SUS316L food-grade contact surfaces, validated nitrogen-flush circuit and MAPA (Brazilian Ministry of Agriculture) documentation package. The enclosed bag-head design allows nitrogen to purge oxygen before and during filling, holding headspace Oâ below 0.5%. Automatic bag-hanging and automatic pallet placement eliminated the two manual lift operations per cycle that had generated workplace injury claims.
Over 24 months of production, the big bag filling machine has maintained FSSC 22000 certification across two external audits with zero non-conformances. Protein oxidation markers in 12-month shelf-life testing remained below 0.1% â well within the EU import specification. The zero-manual-lift design has delivered an injury-free record since commissioning, and ProteSul's annual FIBC capacity has grown to 28,000 MT of soy protein.
Why Big Bag Filling Machine?
SUS316L Food-Grade Contact Surfaces
All product-contact parts machined from SUS316L stainless steel with Ra ⤠0.8 Âľm finish â meets FSSC 22000 and EU 10/2011 food-contact material requirements for soy protein big bag filling machine applications.
Nitrogen-Flush Inside FIBC
Integrated nitrogen purge circuit flushes the FIBC interior before and during filling, reducing headspace Oâ below 0.5%. Prevents protein oxidation in heat-sensitive SPI 90% and SPC 70% during big bag filling machine operation.
Âą0.1% Net-Weight Accuracy
Suspended 4-point load cell system delivers Âą0.1% fill accuracy on every 1MT FIBC â meeting MAPA net-quantity labelling tolerance for export soy protein shipments.
Automatic Bag Hanging & Pallet Placement
Semi-automatic bag-hanging arms and powered pallet conveyor eliminate all manual lift operations. Reduces per-bag cycle time and delivers zero-injury ergonomic compliance since the big bag filling machine was installed.
Project Gallery
Efficiency Gains
| Metric | Before | After |
|---|---|---|
| Protein oxidation (peroxide value, 12 mo) | Borderline EU spec â failing batches | <0.1% â well within EU import standard |
| Workplace lift injuries / year | 2â3 reportable manual-lift incidents | 0 injuries since commissioning |
| MAPA export certification | Pending â EU clearance blocked | Approved â all EU shipments cleared |
| Annual FIBC capacity | ~18,000 MT (capacity constrained) | 28,000 MT (+55%) |
Verified Results
Measured outcomes from actual customer deployment
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