Two pumps in one casing

Russia is currently building a pipeline system almost 5000km long, that connects oil fields in Siberia with markets farther east, e.g., China and Japan. Because this pipeline system is being built in two stages, the operating conditions for the pumps installed in the initial phase will change as pipeline length and required flow increase for the final phase. Sulzer Pumps developed pumps with interchangeable hydraulics in one casing, a feature that allows changing the pump characteristics according to the stage of pipeline construction.