API 610 Provides A Classification For Various Types Of Centrifugal Pumps. The API 610 Pumps Are Primarily Divided In Three Groups: OH, BB And VS.
OH – Overhung Pumps – The Impellers Of These Pumps Protrude From The Bearings. The Support Has To Take Care Of All Forces, E.G. The Overhung Mass And The Rotor Dynamic And Hydraulic Forces. The Impellers Of These Pumps Can Be Mounted Either Horizontally Or Vertically.
BB – Between Bearing Pumps – The Impellers Of BB Pumps Are Suspended In Between The Supports. For All Pumps Of This Type, The Impeller Is Placed Horizontally, In Plane With The Bearings.
VS – Vertically Suspended Pumps – VS Pumps Are Supported Above The Medium To Be Pumped. The Vertically Oriented Impellers Are Suspended Below The Support And Are Submerged Into The Medium.
