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Light Oil Suction Flow Velocity

Recommended suction flow velocity when pumping light oils

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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:

Pipe bore		Light Oil Velocity
inches	mm	m/s	ft/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:

Cavitation and NPSH - an introduction to cavitation 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, 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

Cavitation - an Introduction - Cavitation occurs in fluid flow systems where the local static pressure is below vapor pressure
ISO Grade Oils - Viscosities and Densities - Viscosities and densities of ISO - and equivalent SAE grade oils
Light Oil Pumping Flow Velocity - Max light oil flow velocity on pump delivery side
Motor Oils - Dynamic Viscosity - Dynamic viscosities for motor oils SAE 10 to 50 - temperature range 0 - 100 deg C
Oil Pipes - Recommended Flow Velocities - Flow velocities in oil pipes should be kept within certain limits
Oil Viscosity - Convert Values - Convert between common oil viscosity units
Pump Suction Head and Altitude - The suction heads of pumps are affected by altitude
Pumps - Suction Specific Speed - Suction Specific Speed can be used to determine stable and reliable operations for pumps with max efficiency without cavitation
Specific Heat of Liquids and Fluids - Common liquids and fluids - acetone, oil, paraffin, water and many more - and their specific heats
Viscous Fluids - Recommended Suction Flow Velocity - Recommended pump suction flow velocity for viscous fluids
Viscous Liquids - Recommended Delivery Flow Velocity - Flow velocities on delivery sides of pumps in viscous systems
Water - Delivery Flow Velocity - Required flow velocities in water transport systems - on the delivery side of the pump
Water - Suction Flow Velocity - Recommended water flow velocities on suction sides of pumps

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