The MRPA VS4 pumps are vertically suspend- ed, single-casing, volute, line shaft driven pumps. The MRPA VS4 series meets the requirements of API 610 12TH ed VS4 pumps. As a standard, bearing housing is located above the mounting plate. Optional design with bearing housing below the mounting plate is available. The impeller and casing selection depend on the application and operating conditions. To suit the wide range of applications with impellers ranging from semi-open for liquids containing solids to fully enclosed impeller designs.