Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

# Water - Max. Suction Flow Velocities vs. Pipe Size

## Recommended max. 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:

Water - Max. Suction Flow Velocities
Pipe boreMax. Suction Velocity
inchesmmm/sft/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:

## Related Topics

• ### Fluid Flow and Pressure Loss in Pipes and Tubes

Fluid flow and pressure loss in pipe lines. Water and sewer systems. Steel pipes, pvc pipes, copper tubes and more.
• ### Piping Systems

Calculate dimensions of pipes and tubes. Pressure drop calculations and head loss charts. Use of different piping materials. Insulation of pipes and tubes and heat loss diagrams.
• ### Pumps

Design of pumping systems and pipelines. With centrifugal pumps, displacement pumps, cavitation, fluid viscosity, head and pressure, power consumption and more.
• ### Water Systems

Design of hot and cold water service and utility systems with properties, capacities, sizing of pipe lines and more.

## Related Documents

• ### Boiling Fluids - Max Suction Flow Velocities

Recommended max suction flow velocity when pumping boiling fluids.
• ### Cavitation

Cavitation occurs in fluid flow systems where the local static pressures are below the fluids vapor pressure.
• ### Fuel Oil Pumps - Suction Capacities

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.
• ### Pipe Line Velocities vs. Fluid

Typical fluid flow velocities for common liquids, gases and vapors.
• ### Pipes - Fluid Flow Velocities

Calculate fluid velocity and volume flow in pipes and tubes.
• ### Pumps - NPSH (Net Positive Suction Head)

An introduction to pumps and the Net Positive Suction Head (NPSH).
• ### Pumps - Suction Head vs. Altitude

The suction head of a water pump is affected by its operating altitude.
• ### Pumps - Suction Specific Speed

Suction Specific Speed can be used to determine stable and reliable operations for pumps with max efficiency without cavitation.
• ### Viscous Liquids - Max. Delivery Flow Velocities

Recommended max. flow velocities on delivery sides of pumps in viscous systems.
• ### Viscous Liquids - Max. Suction Flow Velocities

Recommended max. pump suction flow velocity for viscous fluids.
• ### Water - Max. Suction Flow Velocities vs. Pipe Size

Recommended max. water flow velocities on suction sides of pumps.
• ### Water - Max. Suction Flow Velocities vs. Pipe Size

Recommended max. water flow velocities on suction sides of pumps.
• ### Water Flow - Max. Delivery Velocities vs. Pipe Size

Recommended maximum flow velocities in water systems on the delivery side of the pump.

## Search

Search is the most efficient way to navigate the Engineering ToolBox.

## Engineering ToolBox - SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

We don't collect information from our users. More about

We use a third-party to provide monetization technologies for our site. You can review their privacy and cookie policy here.

You can change your privacy settings by clicking the following button: .

## Citation

• The Engineering ToolBox (2003). Water - Max. Suction Flow Velocities vs. Pipe Size. [online] Available at: https://www.engineeringtoolbox.com/pump-suction-flow-velocity-water-d_228.html [Accessed Day Month Year].

Modify the access date according your visit.

7.8.15

.