1995 Bell & Gossett 3551-Series Quantek Centrifugal Pump. Model: 1x1-1/2X6QT. S/N 1945132. Capacity: 50 GPM @ 175 TDH. Seal type: O-ring. Pump construction: SC 6.375. U.S Motors, 7.5 hp, 3465 rpm, 230/460 V, 19.2/9.6 amps, 60 Hz, 3 phase. The 3551-series Quantek is the new standard in close-coupled general purpose pumps. MAC electro-pneumatic valve. Keckley Pressure Relief Valve. Marwin ball valve, Model: UT 2.5 DA, S/N: a5-0622-11-2. HDI disconnect switch. Inlets: (1) 1.75 in. NPT (female). Outlets: (1) 1 in. bevel pressure release fitting (female), (2) 1.75 in. NPT (female). Overall dimensions: 27 in. L x 14 in. W x 30 in.