Ansi Hi 9.8 Rotodynamic Pumps For Pump Intake Design

Specific revisions in the 2018 edition improved guidance for "can" or barrel pump intakes. Intakes for Solids-Bearing Liquids:

For more information, visit the Hydraulic Institute’s website at pumps.org. The full text of ANSI/HI 9.8 can be purchased from HI or ANSI eStandards Store. ansi hi 9.8 rotodynamic pumps for pump intake design

: Prevents "side loading" of the impeller and ensures uniform axial bearing loading. Specific revisions in the 2018 edition improved guidance

| Term | Definition | |------|-------------| | | The inside diameter of the pump’s suction bell (or column pipe for vertical turbines). All clearances are scaled to D. | | Submergence (S) | The vertical distance from the minimum water surface elevation to the top of the suction bell. | | Approach Velocity (Va) | The average velocity of flow in the intake channel before entering the pump bay. | | Suction Coverage | The vertical distance from the bottom of the suction bell to the sump floor. | | Swirl Angle | The angular deviation of flow from the axial direction, measured in degrees. HI 9.8 typically limits this to <5°. | : Prevents "side loading" of the impeller and

More compact designs that accelerate flow into the pump bell.