Rietz Disintegrator. Model: RD-18-H32. U.S. Electrical Motor: 75 hp, 1800 rpm, 220/440 V, 184/92 amps, 60 Hz, 3 phase. Hammer dimensions: 4 in. L x 2 in. W. Number of blades: 24. Blade dimensions: 4 in. L x 1-1/2 in. W. Inlets/outlets: (2) 1 ft. 10 in. W. x 1 ft. 7-1/2 in. H. side access doors, (1) 11-1/2 in. W. x 11-5/8 in. H. U shaped feed, (1) 1 ft. 6 in. pulp discharge, and (1) 2-1/2 in. FNPT bevel seat. Overall dimensions: 3 ft. 6 in. L x 3 ft. 4 in. W x 8 ft. H.