This standard covers the unique features of sealless rotary pumps and includes sections on types and nomenclature; definitions; design and applications; installation, operation, and maintenance; and test. Because of the variety of rotary pump configurations available and the broad range of applications, familiarization with Hydraulic Institute Standards ANSI/HI 3.1 - 3.5 Rotary Pumps for Nomenclature, Definitions, Application and Operation and ANSI/HI 3.6 Rotary Pump Tests is recommended.