Murzan Drum Unloading System. Model: DUS-50. Pump Model: D.U.S. Pump S/N: 96032675. With Capacities up to 60 gpm possible, the DUS-50 is the ultimate solution for emptying the most viscous materials from 55 gallon containers. The DUS-50 Utilizes a 316 stainless steel, sanitary Double-Suction Murzan Diaphragm pump mounted on a food grade plastic base plate and is fitted with a food grade scraper ring which cleans the inside of the container as it is emptied. Drum roller dimensions: 2 ft. 4 in. L x 2 ft. in. W. Follower plate dimensions: 19-1/4 in. dia. (plate), 23 in. dia. (scraper). Inlets: (2) 4 in. dia. suction ports, (1) 3/8 in. dia. (air inlet). Outlets: (1) 4 in. dia. S-line fitting, (1) 1 in. dia. (air exhaust). Overall dimensions: 5 ft. 4 in. L x 4 ft. 7 in. W x 5 ft. 5 in. H.