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Light Oil Suction - Flow Velocities

Recommended max. suction flow velocities when pumping light oils.

Capacity problems, cavitation and higher power consumption in pumps, are often the result of conditions on the suction sides of the pumps.

In general - as a rule of thumb - for light oils, keep the suction fluid flow speed below the following values:

Light Oil Suction - Flow Velocities
Pipe boreLight Oil Velocity
inchesmmm/sft/s
1 25 0.5 1.5
2 50 0.5 1.5
3 75 0.5 1.6
4 100 0.55 1.8
6 150 0.6 2
8 200 0.7 2.3
10 250 0.9 3
12 300 0.9 3

More about NPSH suction problems can be read here:

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