How to determine installation height for a centrifugal pump based on NPSHa and NPSHr to avoid cavitation?

• NPSHa must exceed NPSHr, with a 0.5-1.0 m margin in engineering practice.
• NPSHa = atmospheric pressure + suction surface pressure - vapor pressure - suction line loss.
• Installation height is back-calculated from NPSHa, usually not exceeding the pump's allowable suction vacuum.
• For hot or volatile media, lower the installation height or use a flooded suction.