40–50 kg capacity valve bag — the industry-standard format for cement and flour on high-speed automated filling lines.
The 50 × 80 cm valve top bag is the most widely specified valve bag format in Canada, serving as the standard for 40 kg cement packs and 50 kg industrial flour bags. This is the size that runs on the majority of rotary carousel and inline impeller packing systems in cement plants, flour mills, and dry-mix manufacturing facilities. The 120 mm valve diameter accommodates the higher product flow rates needed for large-volume filling at speeds of 1,200 to 2,400 bags per hour.
At 90–120 GSM fabric weight, this bag provides the tensile and burst strength required for heavy loads that are palletized, stacked in warehouse storage, and transported by truck across long distances. PE inner lamination is standard on cement specifications to prevent moisture wicking through the woven fabric. For flour and food-grade applications, virgin PP construction with food-contact compliance is available. Sackora provides this format with full customization of valve material, position, fabric weight, and coating to match your filling line and product requirements.
All specifications are fully customizable. Contact us to discuss your exact requirements.
| Dimensions (W × H) | 50 × 80 cm |
|---|---|
| Fill Weight | 40–50 kg |
| Fabric Weight | 90–120 GSM |
| Material | Woven Polypropylene (PP) |
| Valve Type | Internal sleeve — kraft paper or woven PP |
| Valve Diameter | 120 mm |
| Lamination | PE inner lamination (standard for cement) |
| Printing | Up to 4-colour flexographic |
| UV Stabilization | Standard for outdoor-stored cement and construction products |
| Order Minimums | Flexible — contact us to discuss |
All specifications are customizable. Contact us with your product details.
Applications
This is the definitive cement bag format across Canada. The 50 × 80 cm valve bag at 100–120 GSM with PE inner lamination meets the performance requirements for Portland cement, masonry cement, and blended hydraulic cements packed at 40 kg on rotary carousel fillers. The 120 mm valve ensures reliable flow of cement powder at production speeds.
Flour mills packing 50 kg bags for bakeries and food manufacturers rely on this format for its compatibility with high-speed auger filling systems. Food-grade virgin PP construction with appropriate certifications ensures compliance with CFIA and FDA requirements for direct flour contact. The valve design minimizes flour dust on the packing line.
Calcium carbonate, limestone powder, agricultural lime, and dolomite are packed in 40–50 kg valve bags on inline filling systems. The heavier GSM fabric withstands the abrasive nature of mineral products, and UV stabilization protects bags stored outdoors at quarry yards and agricultural supply depots.
The 50 × 80 cm format accommodates the 40 kg fill weight that is the Canadian industry standard for Portland cement. The dimensions provide the right internal volume for cement at its typical packed bulk density, while the 120 mm valve diameter matches the filling spouts on the rotary packing systems used in the majority of Canadian cement plants. This standardization means reliable supply, consistent packer compatibility, and optimized pallet configurations.
Yes. The 50 × 80 cm bag handles fill weights from 40 to 50 kg depending on product bulk density. Cement is typically packed at 40 kg, while lighter-density products like flour and some mineral powders fill to 50 kg in the same bag dimensions. Sackora adjusts fabric weight within the 90–120 GSM range to match the specific load and handling requirements of your product.
For cement, a woven PP valve is the preferred choice due to its superior moisture resistance and durability under the abrasive conditions of cement filling. For flour and food-grade applications, a kraft paper valve is commonly specified because it provides an effective friction seal and is suitable for food-contact use. Sackora recommends the appropriate valve material based on your product, packer type, and filling speed.
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