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Pump Head & NPSH

Total Dynamic Head and Available NPSH for centrifugal pump sizing — Hazen-Williams losses with minor coefficients.

Inputs

Method
  • V = Q/A; Vh = V²/(2g); Hf (HW) = 10.67·L·Q^1.852/(C^1.852 · D^4.87) [SI].
  • TDH = Hs + Hf + Σ(K·Vh).
  • NPSHa = (Pa − Pv)/(γ) − Hsuc − Hf,suction.

Results

Velocity V
Friction loss Hf
Minor losses
TDH (Total Dynamic Head)
NPSHa
Required pump kW (η=0.7)