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Suction Flow Velocities of Water
Recommended water flow velocity on suction side of pump
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Capacity problem, cavitation and high power consumption in a pump, is often the result of the conditions on the suction side. In general - a rule of thumb - is to keep the suction fluid flow speed below the following values:
| Pipe bore | Water | ||
| inches | mm | m/s | ft/s |
| 1 | 25 | 0.5 | 1.5 |
| 2 | 50 | 0.5 | 1.6 |
| 3 | 75 | 0.5 | 1.7 |
| 4 | 100 | 0.55 | 1.8 |
| 6 | 150 | 0.6 | 2 |
| 8 | 200 | 0.75 | 2.5 |
| 10 | 250 | 0.9 | 3 |
| 12 | 300 | 1.4 | 4.5 |
More about NPSH suction problems can be read here:
- Cavitations and NPSH An introduction to cavitations and Net Positive Suction Head, NPSH.
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Related Topics
- Fluid Flow and Pressure Drop - Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more
- Piping Systems - Dimensions of pipes and tubes - dimensions, materials, capacities - pressure drop calculations and charts - insulation and heat loss diagrams
- Pumps - Piping systems and pumps - centrifugal pumps, displacement pumps - cavitation, viscosity, head and pressure, power consumption and more
- Water Systems - Hot and cold water systems - design properties, capacities, sizing and more
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Related Documents
- Boiling Fluids - Recommended Suction Flow Velocity - Recommended flow velocity for the pump suction side
- Cavitation - an Introduction - Cavitation may occur in fluid flow systems where local static pressure is below the vapor pressure
- Recommended Delivery Flow Velocity of Viscous Liquids - Normal flow velocities on the delivery side of the pump in viscous systems
