If you run only the left pump in a wide wet well without splitter walls, the flow will cross from the right bay, creating massive asymmetrical swirl.
The standard provides specific dimensional guidelines for various intake configurations: Pipes, Pumps & Valves Africa Jan-Feb 2023 - Issuu ansi hi 9.8 rotodynamic pumps for pump intake design
Later, in the control room, Mara reviewed the NPSH curve against pump performance. The margin was comfortable—enough to weather seasonal fluctuations and a bit of headroom for unexpected sedimentation. She thought of the cavitation reports that had ended careers and budgets; here, compliance with ANSI/HI 9.8 acted as a shield, not a bureaucratic rite but a practical manual for resilience. If you run only the left pump in
cap S equals cap D open paren 1 plus 2.3 cap F sub cap D close paren is the outside diameter of the bell or pipe inlet. cap F sub cap D She thought of the cavitation reports that had
ANSI/HI 9.8 defines specific geometries for several common intake types. Adhering to these "standard" designs often eliminates the need for expensive physical testing. ANSI/HI 9.8-2018 - Rotodynamic Pumps for Pump Intake Design