Abstract: Single suction centrifugal pumps, pump casings, pump systems and vehicles for using pumps which include a single piece casing having a first cut-water wall and a second cut-water wall, corresponding joint-water paths communicating with respective discharge nozzles, the second cut-water wall spanning less than 180 degrees from a leading edge of the second cut-water wall to a trailing edge of the second cute-water wall, and in aspects, the discharge nozzles are offset from a horizontal centerline of a center opening of the casing, the cut-water walls define a diameter which is greater than 1.07 times the impeller diameter, and the diameter is constant for a portion of the walls and transitions to a varying diameter at trailing ends of the walls.

Abstract: Drive casings, heat exchange systems and methods for cooling lubricant within the casings which house within a main cavity of the casing a drive shaft, bearings or gears of an engine-driven apparatus, the casing having an integrated base defining a heat exchanger cavity and separating the heat exchanger cavity from the main cavity, where the base receives cooling liquid within the heat exchanger cavity, a surface of the base within the main cavity defining a main cavity floor which is slanted with respect to a horizontal plane when in normal use.