ANSI/HI 2.1-2.2-2008 (A105)
This standard is for types, nomenclature, and definitions of vertical turbine, mixed flow, axial flow vertical diffuser, submersible motor deepwell and short-set pumps, types VS0, VS1, VS2, VS3, VS6, VS7, and VS8 (Figure 2.1.3) that are driven by vertical electric motors or horizontal engines with right-angle gears. Excluded from the scope of this document are vertical in-line volute pumps; horizontal centrifugal pumps mounted vertically, such as sewage pumps; and vertical overhung impeller types VS4 and VS5 (Figure 2.1.3).