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Pump Flowrate Pressure And Power Coefficient

Calculate pump flow coefficient (Cq), pressure coefficient (Cp), power coefficient (Cw) and pump specific speed from flowrate, delta pressure, pump speed and impeller diameter. The pump coefficients are calculated at the best efficiency point (BEP).

`Cq = Q / (n d^3) `
`Cp = (ΔP) / (ρ n^2 d^2) = (gΔH) / (n^2 d^2) `
`Cw = Cq. Cp = (Q ΔP) / (ρ n^3 d^5) `
`Ns = (Cq^(1/2)) / (Cp^(3/4)) = nQ^(1/2) (ΔP^(3/4)) / ρ `

where :

Cq = flowrate coefficient at BEP
Cp = pressure coefficient at BEP
Cw = power coefficient at BEP
Ns = pump specific speed at BEP
n = pump rotational speed at BEP
d = impeller diameter at BEP
Q = flow rate at BEP
ΔP = delta pressure at BEP
ΔH = delta head at BEP
ρ = fluid density
g = gravity constant

PLEASE NOTE : The pump calculators are currently being updated. Apologies for any inconvenience.

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CALCULATOR : Pump Static Dynamic And Stagnation Pressure And Head Conversion [FREE]   ±

Convert pump pressure and pump head (static and stagnation pressure / head).

Pump head can be calculated from pump pressure by

`H = (P) / (ρ g) `

where :

H = head
P = pressure
ρ = fluid density
g = gravity constant

The stagnation pressure is calculated by

`Pg = Ps + Pd `
`Pd = 1/2 ρ V^2 `
`V = (4 Q) / (pi D^2) `

where :

Ps = static pressure
Pg = stagnation pressure
Pd = dynamic pressure
V = fluid velocity
Q = volume flowrate
D = inside diameter

Tool Input

  • schdtype : Pipe Schedule Type
  • diamtype : Pipe Diameter Type
    • ODu : User Defined Outside Diameter
    • IDu : User Defined Inside Diameter
  • wtntype : Wall Thickness Type
    • tnu : User Defined Wall Thickness
  • voltype : Fluid Flowrate Type
    • Qu : User Defined Volume Flow Rate
    • Mu : User Defined Mass Flow Rate
    • Vu : User Defined Fluid Velocity
  • presstype : Pressure Type
    • Psu : User Defined Static Pressure
    • Pgu : User Defined Stagnation Pressure
    • Hsu : User Defined Static Head
    • Hgu : User Defined Stagnation Head
  • ρ : Fluid Density

Tool Output

  • Hd : Dynamic Head
  • Hg : Stagnation Head
  • Hs : Static Head
  • ID : Inside Diameter
  • M : Liquid Mass Flowrate
  • Pd : Dynamic Pressure
  • Pg : Stagnation Pressure
  • Ps : Static Pressure
  • Q : Liquid Volume Flowrate
  • V : Fluid Velocity