Pump - Centrifugal, Probably 1989 Physical description Single stage end suction centrifugal pump.Part of casing cut away to reveal interior.Painted metalic blue. Inscriptions & markings IR (Ingersoll Rand) logo on side in relief.Type HOC2, 1 1/2 x 1 x 6.Serial No. 89/5252. Subjects machinery; pump; centrifugal; metalwork