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


Piping systems and pumps - centrifugal pumps, displacement pumps - cavitation, viscosity, head and pressure, power consumption and more

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Alternating Pumps

Securing a system and achieve equal wear by alternating pumps in parallel

BEP - Best Efficiency Point - Pump

Pump efficiency design

Boiling Fluids - Max Suction Flow Velocity

Recommended max suction flow velocity when pumping boiling fluids

Boiling Liquids - Max Pumping Flow Velocity

Recommended max flow velocity on the delivery (pressure) side when pumping boiling liquids


Cavitation occurs in a fluid flow system if the local static pressure is below the vapor pressure.

Centrifugal Pump Standards

Centrifugal pump design and dimension standards

Centrifugal Pumps

An introduction to Centrifugal Pumps

Centrifugal Pumps - Minimum Flow

Minimum continuous flow to prevent flashing in centrifugal pumps

Centrifugal Pumps - Speed Torque Curve

Centrifugal pumps and the characteristic speed torque curve

Centrifugal Pumps and Influence from Viscosity

When a liquid flow through a pump, hydrodynamic losses depends on fluid viscosity

Centrifugal Pumps and Shut-Off Head

Centrifugal pumps and maximum (shut-off) head

Centrifugal Pumps Modulated Capacity

Adapting pump capacity to variable process demand

Classifications of Pumps

Selecting between Centrifugal Pumps and Positive Displacement Pumps

Condensate Pumping

High temperatures and danger of impeller cavitation is the major challenge of condensate pumping

Converting Pump Head to Pressure and Vice Versa

Converting head (ft or m) to pressure (psi or bar, kg/cm2) and vice versa

Head Rise and the Energy Equation - for Pump or Fan

The energy equation can be used to calculate head rise in pumps or fans

Light Oil Pumping Flow Velocity

Max light oil flow velocity on pump delivery side

Light Oil Suction Flow Velocity

Recommended suction flow velocity when pumping light oils

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Liquids - Vapor Pressures

Vapor and saturation pressure for some common liquids.

Mechanical Energy vs. the Bernoulli Equation

The Mechanical Energy Equation and the Extended Bernoulli Equation.

NEMA Frame Assignments

NEMA Frame Assignments

NPSH - Net Positive Suction Head

An introduction to pumps Net Positive Suction Head - NPSH

Positive Displacement Pumps

Introduction tutorial to positive displacement pumps basic operating principles

Power Gained by Fluid from a Pump or a Fan

The power gained by fluid from an operating pump or fan

Pressure to Head - Unit Converter

Pressure vs. head units - like lb/in2, atm, inches mercury, bars, Pa and more.

Pressure Units - Online Converter

Convert between pressure units like Pa,  bar, atmosphere, pound square feet, psi and more.

Pump - Volume Flow and Temperature Rise

Calculate temperature rise in pumps

Pump Affinity Laws

Turbo machines affinity laws can be used to calculate volume capacity, head or power consumption in centrifugal pumps with changing speed or wheel diameters.

Pump and Fan Efficiency

Overall pump and fan efficiency is the ratio power actually gained by the fluid to the shaft power supplied

Pump Power Calculator

Calculate pump hydraulic and shaft power

Pump Suction Head vs. Altitude

The suction heads of pumps are affected by altitude

Pumping Water - Energy Cost Calculator

The energy costs of pumping water

Pumping Water - Required Horsepower

Horsepower required to pump water

Pumps - Suction Specific Speed

Suction Specific Speed can be used to determine stable and reliable operations for pumps with max efficiency without cavitation

Pumps in Parallel or Serial

For pumps connected in serial - add head, for pumps connected in parallel - add flowrates

Pumps vs. Compressors, Blowers and Fans

The difference between pumps, compressors, blowers and fans.

Pumps, Fans and Turbines - Horsepower

British Horse Power as used for pumps, fans and turbines - and how to convert to other units.

Specific Speed Pumps

Characterize the type of impeller in pump in a unique and coherent manner

Stable and Unstable Centrifugal Pumps

Characteristics of stable and unstable centrifugal pumps

Static Pressure vs. Head

Static pressure vs. pressure head in fluids.

System Curve and Pump Performance Curve

Utilize the system curve and the pump performance curve to select the proper pump for a particular application

Turbo Machines - Specific Work done by Pumps, Compressors or Fans

Calculate specific work done by pumps, fans, compressors or turbines.

Viscosity - Absolute (Dynamic) and Kinematic

Vicosity is a fluid's resistance to flow and can be valued as dynamic (absolute) or kinematic.

Viscosity Converting Chart

Convert between viscosity units like Centiposes, milliPascal, CentiStokes and SSU.

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

Volume Flow - Online Unit Converter

Convert between volume flow units like gpm, liter/sec, cfm, m3/h.

Water - Suction Flow Velocity

Recommended water flow velocities on suction sides of pumps

Water Flow - Delivery Velocity

Required maximum flow velocity in water systems - delivery side of the pump

Water Pump Calculator

Calculate Pressure Head, Total Dynamic Head, Bowl Horsepower, Total Trust acting on Driver Thrust Bearing, Field Head, Power Loss due to Shafting, Power Loss in Thrust Bearings, Motor Load, Field Efficiency, Input Horsepower (Power Supplied to Driver) and Shaft Elongation

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3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

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 the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse!

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