A two-stage, API between-bearings centrifugal process pump with radially split centerline-mounted case designed for high-temperature (up to 800°F) hydrocarbon service, separates a single inlet flowstream into two outlet flowstreams, one at first-stage discharge pressure and the other at second-stage discharge pressure. This Split Flow feature precludes the need for two separate pumps and saves energy when one pump is used for two separate process flowstreams. The pump is effectively two pumps-in-one with impellers selected for the discrete process requirements of the individual flowstreams. Patents Pending