The is a definitive industry standard developed by the Hydraulic Institute (HI) to ensure that the flow of liquid into a pump is uniform, steady, and free from hydraulic disturbances. Proper intake design is critical because poor hydraulic conditions can lead to reduced efficiency, excessive vibration, and premature mechanical failure. Core Objectives of ANSI/HI 9.8
Cheap, fast, iterative. Cons: May miss free-surface vortices if not using VOF (Volume of Fluid) methods. ansi hi 9.8 rotodynamic pumps for pump intake design
Achieve Type 1 or 2 at minimum NPSH available and maximum flow. The is a definitive industry standard developed by
Poor intake design is the leading cause of pump vibration, cavitation, loss of efficiency, and premature bearing or seal failure. For decades, engineers relied on "rule of thumb" or disparate German (VDI) and British (BHRA) standards. Today, the global gold standard is . Cons: May miss free-surface vortices if not using
: Minimizing surface and sub-surface vortices that can entrain air or cause cavitation.
A single pump is easy. When you put two or more pumps side-by-side, the hydraulics interact. HI 9.8 mandates: