Hydraulic Institute Pump Classifications
The Hydraulic Institute categorizes centrifugal pumps into three main pump categories:
2. Between Bearings (BB) Pumps
3. Vertically Suspended (VS) Pumps
Under these main groups, the Hydraulic Institute has identified unique design configurations. Overhung pumps have OHxx notations, between bearing pumps have BBx notations, and vertically suspended pumps have VSx notations.