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valve bag packer fills powders and fine granules into pre-made valve bags (paper/PP/PE) through a small valve opening. It integrates dosing + weighing + de-aeration for tight, clean, high-speed packing.Machine Types (choose by material) Air (Pneumatic) Packer – best for free-flow powders (cement, fly ash). Fastest. Impeller Packer – for medium flow powders (cement, mortar). High density. Auger (Screw) Packer – for poor-flow / cohesive powders (putty, TiO₂, carbon black). Gravity/Net-weigh – for granules that can flow easily (fertilizer, salt).