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Pump Suction Flow Velocity Water

Reference data and engineering information about pump suction flow velocity water for fluid mechanics applications.

pumpsuctionflowvelocityCalculator

Overview

Engineering reference data for Pump Suction Flow Velocity Water in fluid mechanics.

Key Formulas

Reynolds Number

Re=ρvDμRe = \frac{\rho v D}{\mu}

Ratio of inertial to viscous forces — determines flow regime.

Bernoulli's Equation

P+12ρv2+ρgh=constP + \frac{1}{2}\rho v^2 + \rho g h = \text{const}

Conservation of energy for steady, inviscid, incompressible flow.

Continuity Equation

A1v1=A2v2A_1 v_1 = A_2 v_2

Conservation of mass for incompressible flow.

Darcy-Weisbach

ΔP=fLDρv22\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}

Pressure drop due to friction in a pipe.

Variables

SymbolDescriptionUnit
ReReReynolds number
ρ\rhoFluid densitykg/m³
vvFlow velocitym/s
DDCharacteristic dimensionm
μ\muDynamic viscosityPa·s
PPPressurePa
ffDarcy friction factor

Maximum Suction Flow Velocities for Water

To prevent capacity problems, cavitation, and high power consumption in pumps, keep the suction fluid flow speed for water below the maximum velocities shown in the table. These are general guidelines based on pipe bore size.

8 rows
Maximum recommended suction flow velocities for water to avoid cavitation and performance issues.
Pipe Bore(inches)
Pipe Bore(mm)
Max. Suction Velocity(m/s)
Max. Suction Velocity(ft/s)
1250.51.5
2500.51.6
3750.51.7
41000.551.8
61500.62
82000.752.5
102500.93
123001.44.5

Source: engineeringtoolbox.com

Interactive Charts

Water Pipes - Maximum Suction Velocity

References