Input Parameters

Results

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NPSH Available
ft
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NPSH Required (est)
ft
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NPSH Margin
ft
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Cavitation Risk
Note: Cavitation destroys pumps rapidly. Keep NPSH margin above 3 ft. Use flooded suction or charge pump for high-speed pumps.

Reference

NPSH_A = P_atm(ft) - H_suction - H_loss - P_vapor(ft) Conversion: psi to ft = (psi × 144) / (SG × 62.4) NPSH Required ≈ 5 ft (typical pump) Margin = NPSH_A - NPSH_R (want > 3 ft)