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Cavitation
Calculator
Analyze Net Positive Suction Head (NPSH) to prevent pump inlet cavitation.
Input Parameters
Atmospheric Pressure (psi)
Suction Lift (ft)
Line Losses (psi)
Vapor Pressure (psi)
Fluid Specific Gravity
Calculate
Results
--
NPSH Available
ft
--
NPSH Required (est)
ft
--
NPSH Margin
ft
--
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)