// multi-utility computation suite · offline · instant · precise
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│ computation suite │
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sci.NPSH-cavitation-pump Calculator
Calculates Net Positive Suction Head available (NPSH_a) and compares to pump required NPSH_r to predict cavitation onset. Cavitation occurs when NPSH_a < NPSH_r — it causes noise, vibration, erosion, and performance loss; NPSH_a increases with inlet pressure and decreases with fluid temperature.
Inputs
P Suction Kpa
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
V Suction Ms
Speed in a specified direction (m/s). Required for momentum, kinetic energy, and wave calculations.
P Vapor Kpa
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
Rho Kgm3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Npshr M
Reference formula or conversion factor shown for context.
Results
NPSH available NPSHa (m)
Sample size or count used in the calculation.
NPSH margin (NPSHa − NPSHr)
Sample size or count used in the calculation.
cavitation status
Current state of the system, process, or metric — typically pass/fail, healthy/warning/critical, or a descriptive classification.