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Pumps for the Chemical Industry

All products would be suitable for these applications:
Chemical
Petrochemicals
Biofuels
Caustic
Solvents
Acids & Alkalis
Chemical Dosing
Drum Unloading
Bleach & SLES
Molasses

Sanitary Pumps for Cosmetic Transfer

All products would be suitable for these applications:
Toothpaste
Shampoo & Conditioner
Lotions & Moisturisers
Perfume
Face Scrubs
Bath Bombs
Oils
Alcohol
Makeup
Mouthwash

Hygienic Pumps for Food & Beverage

All products would be suitable for these applications:
Soups
Syrups
Sauces
Dairy & Milk
Grocery Products
Bakery Products
Beverages
Spirits
Confectionery
Chocolate

EHEDG & FDA-Approved Hygienic Pumps

All products would be suitable for these applications:
Dairy
Cheese
Chocolate & Candy
Beverages
Fish & Seafood
Meat & Poultry
Processed Food
Oils & Fats
Pharmaceutical
Cosmetics

Industrial Pumps

All products would be suitable for these applications:
Chemical Processing
Surface Treatment
Paint & Print
Varnish
Wastewater Treatment
Pulp & Paper
Mechanical
Fuels & Petroleum
Biofuels
Sludges & Slurries

Pumps for the Oil & Gas Industry

All products would be suitable for these applications:
Gasoline
Diesel
Kerosene
Jet Fuels
Heating Oils
Asphalt
Fertilisers
Preservatives
Containers
Plastics

Pharmaceutical Grade Pumps

All products would be suitable for these applications:
Drug Manufacturing
Sterile Liquid Transfer
Bioreactor Feeding
CIP Systems
Dosing & Metering
Homogenisation
Tablet Coating
Vaccine Production
API Synthesis
Filtration Systems

Pumps for Pulp & Paper

All products would be suitable for these applications:
Transferring Pulp Slurries
Delivery of Pulp Stock
Headbox Feeding
Additive Metering
Chemical Recovery
Whitewater Circulation
Pulp Bleaching
Paper Recycling
Wastewater Treatment
Reel & Winder Systems

Pumps for Shear-Sensitive Fluids

All products would be suitable for these applications:
Honey
Butter
Creams
Egg Whites
Tomato Sauce
Toothpaste
Printer Ink
Oobleck
Flocculent-Suspended Fluids
Blood

SLES Mixing & Dilution Pump Unit

All products would be suitable for these applications:
Shampoo & Conditioners
Bubble Bath
Lotions & Moisturisers
Toothpaste
Body Wash
Soaps & Liquid Body Gels
Facewash
Mouthwash
Cleaning Products
Detergents

Pumps for Surface Treatment

All products would be suitable for these applications:
Galvanisation
Plating
Degreasing
Pickling
Coating
Painting
Etching
Melting
Surface Hardening
Thermochemical Treatment

Heavy-Duty Pumps for Wastewater Treatment

All products would be suitable for these applications:
Chemical Dosing
Defoaming
Submersible
Dewatering
Sewage
Drainage
Sludge & Slurry
Mining & Quarrying
Effluent
Municipal

Why Choose Tapflo Pumps UK

Discover the benefits of partnering with us:

Trusted globally with over 40 years of experience
Diverse range of 18+ pump types
Advanced Bespoke Engineering expertise
Highest quality products compliant relevant standards
Expert technical support for all applications
Comprehensive servicing and maintenance solutions

ATEX-Certified Pumps

ATEX-certified
Regulatory compliance
Conductive wetted parts
Multiple material options
Zone 0, 1 & 2
Safety assurance
Get in touch with us today!
[email protected]

Booster Sets

Consistent water pressure
Pressure vessel/break-tank options
In-tank booster systems
Various mounting options
BMS contact
Industrial & commercial use
Get in touch with us today!
[email protected]

Centrifugal Pumps

Various impellers
Multiple sealing options
Horizontal/vertical configurations
End-suction, long & close coupled
CIP/SIP capable
Can self-prime, ATEX-available
Get in touch with us today!
[email protected]

Air-Operated Diaphragm Pumps

No-nut, clean-face diaphragms
70% fewer parts
Handles corrosive fluids
Self-priming, can dry-run
Various configurations
Electric/barrier models
Get in touch with us today!
[email protected]

Drum Unloading Systems

High-viscosity handling
99% product removal rate
Inflatable seal system
Standard, Quattro (4 drums) & Flexi models
Versatile applications
Optimal process efficiency
Get in touch with us today!
[email protected]

Flexible Impeller Pumps

Versatile fluid handling
Durable rubber impellers
Suited to various applications
Pulsation-free flow
Self-priming
ATEX-available
Get in touch with us today!
[email protected]

Gear Pumps

External & internal designs
Pulseless flow, high differential pressures
High viscosity handling
Efficient suction lift
Bi-directional flow
ATEX-available
Get in touch with us today!
[email protected]

Rotary Lobe Pumps

Self-priming (wetted)
Efficient solids-handling
Gentle pumping
Operates up to 140°C
CIP/SIP compatible
EHEDG/FDA-approved
Get in touch with us today!
[email protected]

Magnetic Drive Pumps

Vane, Centrifugal, & Turbine options
Superior corrosion resistance
Sealless design
Dry-run protection
ATEX Certified
Various material options
Get in touch with us today!
[email protected]

Industrial Mixers

Electrically or air-driven
Re-mixing capabilities
Eliminates need for intermediate tanks
Cost-effective process
ATEX-available
Safety interlock switch included
Get in touch with us today!
[email protected]

Mobile Pump Solutions

Decanting units & trolleys
Industrial & Hygienic applications
Integrated connections
ATEX-availability
Hose/cable holder included
Removable handles
Get in touch with us today!
[email protected]

Peristaltic Pumps

Low & high-pressure options
Self-priming up to 9m
Minimal fluid contact parts
Longer-lasting hoses
Handles aggressive fluids
CIP/SIP compatible
Get in touch with us today!
[email protected]

Progressive Cavity Pumps

Precise, consistent flow
Self-priming
Handles viscous fluids
Reversible flow
High discharge pressures
Various configurations
Get in touch with us today!
[email protected]

Pump Accessories & Parts

Industrial & hygienic options
Performance optimisation
Wide range available
Components for accurate control
Seamless integration
Extends pump lifespan
Get in touch with us today!
[email protected]

Sanitary Valves

3A/EHEDG certified
USP VI elastomers
Electropolished finish
Various valve options
Multiple sealing materials
Manual/pneumatic actuator
Get in touch with us today!
[email protected]

SLES Mixing & Dilution Pump Unit

Precise mixing & dilution
Cost reduction
Independence from deliveries
Continuous/batch supply
Immediate mixing start
Operational parameters tracing/recording
Get in touch with us today!
[email protected]

Submersible Pumps

Versatile applications
Efficient operation
Automatic level control
Reverse operation protection
Various impeller options & materials
Overheating protection
Get in touch with us today!
[email protected]

Twin Screw Pumps

Wear-resistant seals
Double-chamber design
Versatile liquid handling
CIP/SIP processes
Cavitation mitigation
EHEDG/3A-compliant models
Get in touch with us today!
[email protected]

Why Choose Tapflo Pumps UK

Discover the benefits of partnering with us:

Trusted globally with over 40 years of experience
Diverse range of 18+ pump types
Advanced Bespoke Engineering expertise
Highest quality products compliant relevant standards
Expert technical support for all applications
Comprehensive servicing and maintenance solutions

BBA Pumps Cater To:

Wellpointing
Sewage
Dewatering
Flood Control
Maritime
High Head Pumps
Get in touch with us today!
[email protected]

GemmeCotti Pumps Cater To:

Chemical & Petrochemical
Oil refinery
Pharmaceutical
Electroplating
Water Treatment
Food Processing
Get in touch with us today!
[email protected]

Jump Pumps Cater To:

Food & Wine
Chemical
Personal Care Products
Wastewater
Energies/Oil
Mining & Construction
Get in touch with us today!
[email protected]

Liverani Pumps Cater To:

Oenological & Oil-Based Products
Food & Dairy
Cosmetic & Pharmaceutical
Chemical
Agriculture
Marine
Get in touch with us today!
[email protected]

Nova Rotors Pumps Cater To:

Oenological
Oil & Gas
Papermaking
Wastewater Treatment
Bakery & Dairy
Chemical
Get in touch with us today!
[email protected]

Pomac Pumps Cater To:

Food
Beverage
Pharmaceuticals
Chemicals
Starch
Liquid Transport
Get in touch with us today!
[email protected]

Salvatore Robuschi Pumps Cater To:

Wastewater
Chemical
Oil & Gas
Food & Farms
General Industry
Textiles
Get in touch with us today!
[email protected]
This is a close up of pump parts

What is Pump Efficiency and Why is it Important?

Edward Shaw
written by:

Edward Shaw

Technical Manager

26/01/2022

What is Pump Efficiency?

Simplified, pump efficiency is how well a pump converts the useful energy from a hydraulic power source and transfers it to the pump output. As an example, if an electric motor was to provide X amount of energy to a machine, and the output is 1/X (Half of X), then the efficiency of the machine is 50%. This is because 50% of the energy has not been used on the primary output of the machine, and as such is ‘wasted’ energy.

This ‘wasted’ energy can come in many forms for a pump, such as excessive noise or heat generation. For a pump transferring fluid from Point A to Point B, noise and heat are not desirable forms of energy for us (in most cases), so we classify them as ‘wasted’ energy.

All pumps offer different levels of efficiency; if you’re using Centrifugal Pumps, our guide on Achieving Maximum Efficiency for your Centrifugal Pump may be useful.

Why is Pump Efficiency Important?

In short, a more efficient pump saves you money.

A highly inefficient pump will waste energy when moving fluid in a system, resulting in higher electricity costs to power the pump. There is also the element of maintenance costs; an inefficient pump will wear quicker than an efficient pump, meaning a loss in revenue income (because the pump is not functioning, stopping production), more labour and time to getting the pump up and running, and more spares being required per year to repair the pump.

What Influences the Overall Efficiency of a Pump?

Overall pump efficiency is what you would use to determine the amount of wasted energy loss throughout a pump, which can be defined as the ratio of the actual power output to the actual power input. There are three elements that influence and change a pumps overall efficiency:

  • Mechanical: This is the efficiency used to calculate and identify the power lost in moving parts of the pump, such as bearings, stuffing boxes, mechanical seals etc. This can be defined as the ratio of theoretical power the pump requires to the actual power delivered to the pump itself.
  • Volumetric: Volumetric efficiency is used to calculate and identify the liquid lost through balancing holes and wear rings. This also includes the clearances between the pump casing and impeller vanes for semi-open or open impeller designs. This can be defined as the ratio of the actual flow rate that the pump provides to the theoretical discharge flow rate.
  • Hydraulic: This is perhaps the most important factor to consider, as it calculates & identifies the losses of liquid friction and other losses inside the volute and impeller. This can be defined as the ratio of useful hydrodynamic energy (in the form of fluid) to the amount of mechanical energy delivered to the rotor.

How to Calculate Pump Efficiency

Pump Efficiency Curve

Example of Pump Efficiency Curve

Pump Efficiency (η) = (Q × H × p) / (367 × P2)

Q = Flow (m3/hr)
H = Delivery Head (m)
p = Density of fluid (kg/dm3)
367 = Conversion Constant
P2 = Power Consumption at pump shaft (kW)

What is BEP?

BEP stands for Best Efficiency Point and is the best point on the performance curve of where the pump can perform. At the BEP, the fluid enters the pump suction and leaves the discharge with the least amount of wasted energy possible.

What if I cannot reach the BEP?

Whilst you would not be directly achieving the best scenario for the pump, that doesn’t mean the pump will break immediately or that it cannot handle the application.

Another acronym that is closely tied to the BEP is the POR. This is the Preferred Operating Region (or Preferred Operating Range) and is the preferred place to operate the pump, as sometimes it is not always possible to operate at the exact BEP point. The POR can vary in size depending on the design of the pump, however, it is generally within 70% to 120% of the BEP point.

Operating within the POR is crucial to ensuring the pump will last as long as possible, as the hydraulic efficiency and operational reliability are not reduced substantially. Inside the range, the service life of the pump is not affected by the internal hydraulic loads or vibration.

There is another region on a pump curve called the AOR, which means Allowable Operating Region (or Allowable Operating Range). This is the area of performance where the pump can still perform, and the service life of the pump is still within acceptable standards.

What happens if I operate outside the AOR?

Bad things happen outside the AOR. It doesn’t always happen straight away, however, when operating outside the AOR, you will see excess wearing which costs money to rectify.
And if you’re operating as far left or as far right of the curve as you possibly can, then the pump is likely to fail almost immediately.

What can I do to use a pump that’s reaching BEP?

There are many ways of ensuring you have the most efficient pump possible for your process. There are almost countless designs of pumps available, each with strengths and weaknesses which influence efficiency & reliability. One common way of increasing overall pump efficiency for a process is to utilise a bigger pump and run it at a slower RPM speed.

Bigger pumps, especially centrifugal pumps, have a higher % BEP. On average, small centrifugal pumps have BEP of 40 – 50%, whereas large centrifugal pumps have BEP of 70 – 80%, with some achieving 90%. We here at Tapflo pride ourselves on high-efficiency systems & services, so please consult with our team for the best possible pump for your process!


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