Viscous Liquids - Max. Suction Flow Velocities
Avoid higher velocities in suction pipes. Higher velocities increases pressure loss in pipes and the pumps may start to cavitate. For viscous liquids - as a rule of thumb - the suction velocities in front of pumps should be below:
Pipe bore | Max. Suction Velocity | ||
---|---|---|---|
inches | mm | m/s | ft/s |
1 | 25 | 0.3 | 1 |
2 | 50 | 0.33 | 1.1 |
3 | 75 | 0.36 | 1.2 |
4 | 100 | 0.4 | 1.3 |
6 | 150 | 0.43 | 1.4 |
8 | 200 | 0.45 | 1.5 |
10 | 250 | 0.5 | 1.7 |
12 | 300 | 0.5 | 1.7 |
These values depends a lot on the fluid pumped. More about viscosity and viscosities for different fluids:
- Viscosity Conversion Factors - convert between Centistokes, Centiposes, SSU and Degree Engler
- A Viscosity Converting Chart - converting table between Centiposes, milliPascal, CentiStokes and SSU
- Viscosity of common Fluids - viscosity of fluids like motor oil, diesel fuel, peanut oil and many more
Related Topics
• Fluid Flow and Pressure Loss
Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more.
• Piping Systems
Dimensions of pipes and tubes, materials and 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.
Related Documents
Boiling Fluids - Max Suction Flow Velocities
Recommended max suction flow velocity when pumping boiling fluids.
Cavitation
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Single stage and double stage fuel oil pumps and their suction capacities.
Light Oil Suction - Flow Velocities
Recommended max. suction flow velocities when pumping light oils.
Liquids - Kinematic Viscosities
Kinematic viscosities of some common liquids like motor oil, diesel fuel, peanut oil and many more.
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Pumps - Suction Specific Speed
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Viscosity - Absolute (Dynamic) vs. Kinematic
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Viscosity - Converting Chart
Convert between viscosity units like Centiposes, milliPascal, CentiStokes and SSU.
Viscous Liquids - Friction Loss vs. Viscosity and Flow
Friction loss in steel pipes for fluids with viscosities ranging 32 - 80000 SSU.
Viscous Liquids - Max. Delivery Flow Velocities
Recommended max. flow velocities on delivery sides of pumps in viscous systems.
Water - Max. Suction Flow Velocities vs. Pipe Size
Recommended max. water flow velocities on suction sides of pumps.