Water - Suction Flow Velocity
Recommended water flow velocities on suction sides of pumps
Capacity problems, cavitation and high power consumption in pumps, are often results of the conditions on the suction side.
In general - as a rule of thumb - keep the suction fluid flow speed below the following values:
Pipe bore | Water Suction Velocity | ||
---|---|---|---|
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 and suction problems:
- Cavitations and NPSH - An introduction to cavitation and Net Positive Suction Head NPSH