Prater G7HFS 50HP HammermillApr 10, 2014 . Used Prater G7HFS 50HP Full Circle Hammermill - Rated for 30HP to 60HP Motors - Includes 50HP, 3535 RPM, 243/460 V motor - 68" x 38" x 80" Total Dims - 8" Di.pulva hammer mill,pulva hammer mill,Pulva Corporation | Powder/Bulk SolidsSince Pulva's beginning in 1938, we have produced quality pulverizing equipment for the particle size reduction industry. Our Pulva-Sizers are impact type grinding mills employing the use of hammers. We offer highly dependable, highly efficient precision grinding machines designed to last for years. In addition to our.