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DH series dry roll press granulator adopts dry rolling technology to compress the powdery materials with moisture content less than 5% into pieces or tablets, then going through the processes of breaking into granules and screening to make the lump materials into granules that meet the requirements of application. Dry roll press granulator mainly depends on the manner of external pressure to force the material going through the gap between two relatively turning rollers to compress into laminar particles. During course of roller pressing, the real density of materials can increase 1.5 to 3 times thus reaching certain demands of granular strength.