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

Pumps

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 - the Best Efficiency Point of a Pump

BEP is where the pump is most efficient.

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

Cavitation occurs in fluid flow systems where the local static pressures are below the fluids vapor pressure.

Centrifugal Pump Standards

International centrifugal pump design and dimension standards.

Centrifugal Pumps

An introduction to Centrifugal Pumps.

Centrifugal Pumps - Capacity Modulation

Modulating pumps to adapt capacities to variable process demands.

Centrifugal Pumps - Minimum Flow

Minimum continuous flow to prevent flashing in centrifugal pumps.

Centrifugal Pumps - Shut-Off Head

Centrifugal pumps and maximum shut-off head.

Centrifugal Pumps - Speed Torque Curve

The characteristic speed torque curves for centrifugal pumps.

Centrifugal Pumps - Stable and Unstable Flow

The characteristics of stable and unstable flow.

Centrifugal Pumps - Viscosity Influence

Hydrodynamic losses through pumps depends on fluid viscosities.

Condensate Pumping

High temperatures and danger of impeller cavitation is the major challenge for condensate pumping in steam systems.

Efficiency in Pumps or Fans

The overall pump and fan efficiency is the ratio power gained by the fluid to the shaft power supplied.

Light Oil Pumping - Flow Velocities

Recommended max. flow velocities on the delivery side when pumping light oils.

Light Oil Suction - Flow Velocities

Recommended max. suction flow velocities when pumping light oils.

Liquids - Vapor Pressures

Vapor and saturation pressure for some common liquids.

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Mechanical Energy Equation vs. Bernoulli Equation

The Mechanical Energy Equation compared to the Extended Bernoulli Equation.

Positive Displacement Pumps

Introduction tutorial to positive displacement pumps basic operating principles.

Power Gained by Fluid from Pump or Fan

Calculate the power gained by fluid from an operating pump or fan.

Pressure Units - Online Converter

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

Pressure vs. Head Unit Converter

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

Pump - Temperature Rise vs. Volume Flow

Calculate temperature rise vs. volume flow in pumps.

Pumping Water - Energy Cost Calculator

Calculate the energy cost of pumping water.

Pumping Water - Required Horsepower

Horsepower required to pump water.

Pumps - Affinity Laws

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

Pumps - Classifications

Centrifugal pumps vs. positive displacement pumps.

Pumps - Head vs. Pressure

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

Pumps - NPSH (Net Positive Suction Head)

An introduction to pumps and the Net Positive Suction Head (NPSH).

Pumps - Parallel vs. Serial Arrangement

Adding head and flowrate for pumps arranged in parallel vs. serial.

Pumps - Power Calculator

Calculate pumps hydraulic and shaft power.

Pumps - Specific Speed

Characterizing of impeller types in pumps in a unique and coherent manner.

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.

Pumps and Fans - Energy Equation and Head Rise

The energy equation can be used to calculate the head rise in pumps and fans.

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.

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) vs. Kinematic

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

Viscosity - Converter Chart

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

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.

Volume Flow - Online Unit Converter

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

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.

Water Pump Calculator

Water pump calculations.

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