Ansi Hi 9.8 Rotodynamic Pumps For Pump Intake Design

The ANSI/HI 9.8 Rotodynamic Pumps for Pump Intake Design standard provides comprehensive criteria for designing pump intakes to ensure uniform, steady flow free from swirl and entrained air. Proper intake design is critical to maintaining high hydraulic efficiency, reducing vibration, and preventing premature pump failure. Core Design Principles

Vortex Control: Provides rules for minimum submergence and wet well geometry to minimize surface and sub-surface vortices. ansi hi 9.8 rotodynamic pumps for pump intake design

"You see a drawing, Miller," Elias said, his voice gravelly. "I see a trap." The ANSI/HI 9

Importance of Pump Intake Design

: Enhanced terms, definitions, and figures to improve usability and technical accuracy. Core Design Intakes Covered New pump station designs (water, wastewater, industrial)

• New pump station designs (water, wastewater, industrial).
• Retrofitting existing sumps with recurring cavitation, vibration, or low efficiency.
• Pumps handling clean or dirty water (separate guidelines for solids handling).
• Variable frequency drive (VFD) applications, where submergence must be adequate at all flows.

References & Further Reading

• Hydraulic Institute: ANSI/HI 9.8-2018 Rotodynamic Pumps for Pump Intake Design
• HI 9.6.1: Rotodynamic Pumps – NPSH Margins
• ASCE Manual No. 112: Pump Intake Design