The ANSI/HI 9.8-2024 standard, titled Rotodynamic Pumps for Pump Intake Design, is a critical industry benchmark for designing or modifying pumping facilities to ensure uniform, swirl-free, and air-free flow. Developed by the Hydraulic Institute (HI), it bridges fluid mechanics theory with practical geometry to maximize pump efficiency and lifespan. Core Design Objectives
Velocity Limits: Maintaining inlet velocities—typically between 1.2 to 3.0 m/s (4 to 10 ft/sec)—to avoid excessive turbulence and erosion. Intake Types Covered ansi hi 9.8 rotodynamic pumps for pump intake design
Key Provisions of ANSI HI 9.8
Vortex Suppression: Provides criteria to minimize both free-surface and sub-surface vortices that can introduce air and damage mechanical seals or impellers. The ANSI/HI 9
ANSI/HI 9.8 outlines specific geometric and hydraulic requirements for various intake types, including rectangular, circular, trench-type, and unconfined intakes. 1. Minimum Submergence ( The ANSI/HI 9.8-2024 standard