50 kg heavy-duty valve bag — maximum capacity format for large-volume construction powders and industrial filling operations.
The 55 × 85 cm valve top bag is the largest standard format in the valve bag range, built for 50 kg fills of heavy construction powders and industrial materials. This heavy-duty specification is selected when maximum bag capacity is required to reduce the number of bags per pallet and minimize packaging cost per tonne. The 140 mm valve diameter enables rapid filling of coarse and high-flow powders that require a larger valve opening for consistent throughput on rotary and inline packing systems.
Fabric weight at 100–120 GSM delivers the burst strength and tear resistance demanded by 50 kg loads that undergo mechanical palletizing, multi-layer stacking, and long-haul trucking. The heavier fabric also provides better puncture resistance for abrasive products such as coarse sand-cement mixes and mineral aggregates. PE inner lamination is standard on this specification to protect against moisture during outdoor stockpiling at construction sites, ready-mix plants, and building supply yards. Sackora manufactures this format with reinforced valve construction to handle the higher product flow rates and packer pressures associated with large-valve filling operations.
All specifications are fully customizable. Contact us to discuss your exact requirements.
| Dimensions (W × H) | 55 × 85 cm |
|---|---|
| Fill Weight | 50 kg |
| Fabric Weight | 100–120 GSM |
| Material | Woven Polypropylene (PP) |
| Valve Type | Internal sleeve — kraft paper or woven PP (reinforced) |
| Valve Diameter | 140 mm |
| Lamination | PE inner lamination (standard) |
| Printing | Up to 4-colour flexographic |
| UV Stabilization | Standard — rated for extended outdoor exposure |
| Order Minimums | Flexible — contact us to discuss |
All specifications are customizable. Contact us with your product details.
Applications
Ready-mix cement, concrete repair compound, and heavy mortar mixes packed at the full 50 kg fill weight use this large-format valve bag. The 140 mm valve handles the coarser particle blends found in concrete restoration products, and the 100–120 GSM fabric withstands the rough handling typical of construction site delivery and outdoor stockpiling.
Silica sand, blasting sand, and sand-cement blends destined for construction and industrial applications are packed in 50 kg valve bags for cost-efficient bulk distribution. The heavy fabric resists abrasion from angular sand particles, and PE lamination prevents moisture uptake that would compromise product flow and application performance.
Any high-throughput powder packing operation that benefits from maximizing fill weight per bag — reducing bag count per pallet and overall packaging material cost — specifies this 55 × 85 cm format. Applications include agricultural gypsum, calcium chloride road de-icer, and bulk chemical powders distributed in 50 kg packs.
Choose the 55 × 85 cm format when you need a full 50 kg fill weight with headroom for product settling, or when your product has a lower bulk density that requires more internal volume to reach target weight. The larger valve diameter (140 mm vs 120 mm) also benefits products with coarser particle size or higher flow rates that need a wider valve opening for consistent fills.
The 140 mm valve diameter is compatible with large-format filling spouts on rotary and inline packing systems from major manufacturers including Haver & Boecker, Behn Bates, and Concetti. Some older packing systems may use smaller spout fittings — Sackora confirms valve-to-spout compatibility with your equipment specifications before production.
Yes. For highly abrasive products such as coarse silica sand or calcium carbide, Sackora can manufacture this bag at fabric weights up to 140 GSM or add a second layer of woven fabric in high-stress areas. Reinforced seam construction and additional valve length are also available to extend bag performance under extreme handling conditions.
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