// multi-utility computation suite · offline · instant · precise
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│ computation suite │
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eng.pump-npsh-cavitation Calculator
Calculates Net Positive Suction Head available (NPSHa) from system conditions and compares to pump NPSHr to assess cavitation risk. NPSHa must exceed NPSHr by at least 1.5–2m margin — cavitation causes pump noise, vibration, erosion, and eventual impeller failure.
Inputs
Atmospheric Pressure Kpa
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
Suction Head M
Reference formula or conversion factor shown for context.
Friction Loss M
Reference formula or conversion factor shown for context.
Vapor Pressure Kpa
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
Fluid Density Kg M3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Results
NPSHA (m)
Sample size or count used in the calculation.
vapor pressure head (m)
Reference formula or conversion factor shown for context.
atmospheric pressure head (m)
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).