Pumps

Alternating Pumps

Secure the system and achieve equal wear by alternate pumps in parallel

Best Efficiency Point - BEP

Maximum designed pump efficiency 

Boiling Fluids - Recommended Suction Flow Velocity

Recommended flow velocity for the pump suction side

Cavitation - an Introduction

Cavitation may occur in fluid flow systems where local static pressure is below the vapor pressure

Centrifugal Pump Speed-Torque Curve

Centrifugal pumps characteristics - speed torque curve

Centrifugal Pumps

An introduction to Centrifugal Pumps

Centrifugal Pumps - Minimum Flow

Centrifugal pumps and minimum continuous flow

Centrifugal Pumps and Standards

Centrifugal pumps design and dimensions standards

Centrifugal Pumps and Viscosity

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

Classifications of Pumps

Selecting between Centrifugal Pumps and Positive Displacement Pumps

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Condensate Pumping

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

Converting Pump Head to Pressure

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

Discharge Regulation of Centrifugal Pumps

Adapting pump capacities to process demand

Dynamic, Absolute and Kinematic Viscosity

An introduction to dynamic, absolute and kinematic viscosity and how to convert between CentiStokes (cSt), CentiPoises (cP), Saybolt Universal Seconds (SSU), degree Engler and more

Equation of Mechanical Energy

The equation of mechanical energy in terms of Energy per Unit Mass, Energy per Unit Volume and Energy per Unit Weight involving head

Flow Units Converter

Convert between volume flow units - gpm, liter/sec, cfm, m³/h - online flow unit converter

Head Rise and the Energy Equation for a Pump or a Fan

The energy equation can be used to calculate the actual head rise in a pump or fan

Light Oils - Recommended Suction Flow Velocity

Recommended flow velocity for the pump suction side

NEMA Frame Assignments

NEMA Frame Assignments

NPSH - Net Positive Suction Head

A definition and an introduction to Net Positive Suction Head - NPSH

Positive Displacement Pumps

An introduction tutorial to the basic operating principles of positive displacement pumps

Power Gained by Fluid from Pumps or Fans

The power gained by fluid from operating pumps or fans

Pressure Units Online Converter

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

Pressure to Head Unit Converter

Converting between common units for pressure and head - lb/in², atm, inches mercury, bars, Pa and more ..

Pump Affinity Laws

Turbo machines affinity laws are used to calculate volume capacity, head or power consumption in centrifugal pumps when changing speed - rpm - or wheel diameters

Pump Power Calculator

Calculate pump hydraulic and shaft power?

Pump and Fan Efficiency

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

Pumping Boiling Liquids - Delivery Flow Velocities

Recommended flow velocity required on the delivery side of the pump in systems with boiling liquids

Pumping Light Oils - Delivery Flow Velocities

Recommended flow velocity required for light oil systems on the delivery side of the pump

Pumping Water - Horsepower Requirements

Horsepower requirements pumping water

Pumps - Specific Suction Speed

Specific Suction Speed may be used to determine what general pump design to use for maximum efficiency

Pumps in Parallel or Serial Connection

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

Pumps, Compressors, Blowers and Fans

Comparing pumps, compressors, blowers and fans

Pumps, Fans and Turbines - Horsepower

Definition of British Horse Power for pumps, fans and turbines - how to convert to other common units

Recommended Delivery Flow Velocity of Viscous Liquids

Normal flow velocities on the delivery side of the pump in viscous systems

Shut-off Head

Centrifugal pumps and maximum - or shut-off - head

Specific Speed - Pumps

Specific speed may be determined independent of the pump size

Specific Work of Turbo Machines - Pumps, Compressors and Fans

Specific work of pumps, fans, compressors and turbines

Stable and Unstable Centrifugal Pumps

Characteristics of stable and unstable centrifugal pumps

Static Pressure and Pressure Head in Fluids

Static pressure and pressure head

Suction Flow Velocities of Water

Recommended water flow velocity on suction side of pump

Suction Head affected by Altitude

Pump suction head as affected by altitude

System Curve and Pump Performance Curve

To select a proper pump for a particular application it is necessary to utilize the system curve and the pump performance curve

Vapor Pressure

Saturation pressure - exerted by escaping molecules

Viscosity Converting Chart

A converting table between viscosity units like Centiposes, milliPascal, CentiStokes and SSU

Viscous Fluids - Recommended Suction Flow Velocity

Recommended suction flow velocity of viscous fluids

Volume Flow and Temperature Rise in Pumps

Calculate temperature rise in pumps

Water Delivery Flow Velocities

Required flow velocities in water transport systems - on the 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

Water Pumping Costs

Costs pumping water