Gear pumps are a type of rotary positive displacement pump, meaning they pump a constant amount of fluid for each revolution. Gear pumps transfer fluid by gears coming in and out of mesh to create a non-pulsating pumping action. Gear pumps are able to pump at high pressures and excel at pumping high viscosity liquids efficiently.

How do Gear Pumps Work?

There are no valves in a gear pump to cause friction losses and also high impeller velocities, with resultant friction losses, are not required as in a centrifugal pump. Therefore a gear pump is well suited for handling viscous liquids such as fuel and lubricating oils. Gear pumps are not suited for pumping solids and abrasive liquids.

Gear Pumps Manufacturers

Internal and external gear pumps are the two basic types of gear pumps. Both the internal and external gear pumps have an idler gear that is driven by the driving gear and both use the same method of gears coming in and out of mesh to create a pumping action. The main differences between the two gear pumps are the placement of the gears and where the fluid is trapped.

All Pumps carries brands such as Tuthill, Roper, Oberdorfer, Koshin & KGC and offers a wide range of gear pumps, and has experience and expertise in hundreds of different applications of this type of pump.

Brands we Sell, Stock & Service

Tuthill manufactures a range of highly engineered pumps for the chemical, oil and process industries. Manufactured in the United States from high-quality materials, Tuthill has a solid reputation for great performance amongst difficult fluid transfer applications. Tuthill products include AC/DC fuel transfer pumps, diaphragm pumps, hand pumps, flow meters, accessories and more.


Tuthill Gear Pumps Range:

Tuthill Gear Pumps

Roper external gear pumps service a range of industries including engineering, oil, industrial, gas and transport. Made from high quality cast iron and stainless steel materials, the Roper pump range of products is suited for handling anything from water to the most viscous products such as molasses, oil, chocolate, tar emulsion among other chemicals.

Designed and manufactured to ISO 9001:2000 standards, the complete line of Roper pumps is imported and distributed by All Pumps across Australia. Being a very robust pump, the Roper range has proven to be an excellent workhorse for for the most demanding applications. The range of pumps and spare parts have been supported in Australia for in excess of 10 years by All Pumps.


Roper gear pumps range:


Oberdorfer manufactures a range of external gear pumps to suit many industrial and chemical processing fields, including day tank applications, machine coolant circulation, and pumping harsh chemicals.

All Pumps is the distributor of the Oberdorfer bronze and Chemsteel gear pump ranges along with the related parts and servicing expertise.

Oberdorfer Gear Pumps Range:


Koshin gear pump is applicable for a wide range of activities from low viscosity oil such as kerosene, light oil, medium/high-viscosity oil etc. Since the pump has a bypass valve built-in and is equipped with relief function, it is very safe.


KGC gears pumps can be used in a wide variety of applications. These positive displacement low inertia pumps are excellent at pumping fluids at low to medium pressures. These pumps can be used to pump water and a large range of other non-abrasive fluids including oils and molasses.

Very useful for pressure boosting, liquid transfer, factory process pumping and lubrication duties.

Order now to KGC Pumps.