Diverse Line of Perfected Gear Pumps

Oberdorfer may not have invented the gear pumps but you could say we’ve perfected it. Founded on our line of bronze gear pumps, Oberdorfer continues to lead the industry in quality and innovation.

The helical gears, which are cut on angle to the face of the gear, allows for more material contact resulting in a better hydraulic range and quieter operation. While some manufacturers offer a few variations, Oberdorfer has a full selection of styles and models which include:

  • External Gear Pumps
  • Pedestal Mount Gear Pumps
  • Clutch Driven Gear Pumps
  • Motor Mount Gear Pumps

Pump models feature a wide variety of construction materials to best suit your application. Choose from bronze, lead free alloy, stainless steel, cast iron, hastelloy c and non-metallic models of gear pumps.

For more than 100 years, the family of gear pumps from Oberdorfer has provided reliable and diverse operation in the field for our customers.

All About Gear Pumps

Gear pumps utilize gears, sometimes called rotating cogs, to transfer fluids. The two gears produce a seal and creates suction to the inlet side, fluid is drawn into the pump and then the gears rotate moving the liquid to the outlet port.

There are two basic designs, internal or external. Internal gear pumps are typically designed with a gear within a gear, with both rotating the same way with the outer gear driving the inner (or idler) gear. External gear pumps feature two gears of the same size, rotating opposite of each other pushing the liquid to either side before joining back up at the output.

High viscosity fluids and harsh liquids are common applications, as well as resins, chemicals, oils, ink, solvents, food products and more. The rotating gears evacuate any air in the suction line and force the liquid into the pump, enabling self priming capabilities. Gear pumps are able to handle moderate to high pressure, low to high temperatures and a range of flow rates and high capacities due to their overall design.

In many cases, especially internal models, gear pumps are compact in size and economical. Their steady and consistent flow makes gear pumps an ideal solution for applications where precise volume is important.