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Gear Pumps

Gear Pumps, available in external & internal designs, deliver accurate, pulseless flows at high differential pressures. Ideal for handling medium to high-viscosity fluids across many industries. Their compact design, simplicity, reliability and ATEX options make them optimal for demanding applications. Gear pumps are available in 3 different variants; Internal Eccentric, External & Helical.

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Helical External Gear Pump

Helical External Gear Pump

Max. Temp

200C

Max. Head

150m

Max. flow

250m³/h

Materials

Various Alloys

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Internal Eccentric Gear Pump

Internal Eccentric Gear Pump

Max. Temp

200C

Max. Head

150m

Max. flow

250m³/h

Materials

Various Alloys

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Magnetically Driven Internal Eccentric Gear Pump

Magnetically Driven Internal Eccentric Gear Pump

Max. Temp

250C

Max. Head

120m

Max. flow

55m³/h

Materials

Various Alloys

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Modular External Gear Pump

Modular External Gear Pump

Max. Temp

100C

Max. Head

300m

Max. flow

7.7m³/h

Materials

Various Alloys

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Magnetically Driven Internal Eccentric Gear Pump

Magnetically Driven Internal Eccentric Gear Pump

Max. Temp

100C

Max. Head

305m

Max. flow

10.5m³/h

Materials

Various Alloys

View Product

What is a Gear Pump?

Gear Pumps are a type of Positive Displacement Pump available in two designs, internal and external gear. They work by enclosing a fixed volume of fluid using interlocking cogs or gears that create a continuous flow of fluid. The external design uses two identical gears rotating next to each other, supported by separate shafts, whereas the internal design consists of two gears of different sizes, with one rotating inside the other.

What is a Gear Pump?

Gear Pumps are a type of Positive Displacement Pump available in two designs, internal and external gear. They work by enclosing a fixed volume of fluid using interlocking cogs or gears that create a continuous flow of fluid. The external design uses two identical gears rotating next to each other, supported by separate shafts, whereas the internal design consists of two gears of different sizes, with one rotating inside the other.

Advantages of Gear Pumps

Gear Pumps provide numerous benefits and have been engineered to meet the highest safety standards, offering ATEX on request.
  • Accurate and pulseless flow at high differential pressures
  • Can pump fluids too viscous for Centrifugal Pumps
  • Superior mechanical efficiency across varying pressures and flows
  • Efficient suction lift capabilities
  • Bi-directional flow
  • ATEX available

Are Gear pumps self-priming?

Self-priming means that the pump can create its own suction without the need for additional liquid or air. Our Magnetic Drive Hot Oil Gear Pump is self-priming up to 6m in water.

Are Gear Pumps suitable for hygienic applications?

Yes, Gear Pumps such as the Magnetically Driven Internal Eccentric, Magnetic Coupled Internal Eccentric, and the Magnetic Drive Hot Oil Gear Pump are suitable for hygienic applications such as food production, cosmetics and pharmaceuticals.

Common Industries & Applications

Gear Pumps are widely recognised for their exceptional fluid transfer capabilities and are well suited to the transfer of viscous and semi-viscous fluids.
  • Fuels, Oils, Diesel-Fuel Tanks
  • Paints and Dyes
  • Pharmaceutical
  • High Volume Transfer
  • Transferring Molasses
  • Adhesives
  • Solvents
  • Marine

What are your Fluid & Media Transfer Characteristics?

To choose the appropriate Gear Pump for your application, ask yourself the following questions:
  • What media will be pumped? Consider the chemical composition of the media you will be pumping – is it chemically neutral or corrosive, shear sensitive etc.
  • What is the viscosity of the media you intend to pump? Consider viscosity limitations, shear sensitivity etc.
  • Do you need to pump fluids containing solids?
  • Is your environment or fluid explosive?

Materials Available

  • Cast Iron
  • Stainless Steel AISI 304/316
  • Cast Steel
  • Steel
Gears are available in various materials to support your application requirements. Some of our materials offer an ATEX option on request for explosive applications and environments.

Maintenance Required to Keep your Gear Pumps Running

Regular maintenance is crucial to keeping your pump performing at its best and ensuring a long life span. To look after your Gear Pump, you should:
  • Regularly inspect the bearings and replace when necessary
  • Ensure there is enough clearance between gear teeth and chambers
  • Inspect the seals to prevent leakage
  • Check the motor is functioning correctly
  • Monitor the temperature to avoid overheating
Depending on the size of your pump and the fluid you are pumping, a more detailed maintenance schedule may be required.

Additional Factors to Consider

  • Will your pump be stationary, or do you need it to be portable? If you require portability, Gear Pumps can be fitted to trolleys of any size to suit your needs.