Internal Lobe Pumps

Our L range of Internal Lobe Pumps was born from the original Stothert and Pitt Internal Lobe Pump range. Manufactured in a number of materials, Albany can now provide Internal Lobe Pumps in various material combinations including cast iron, cast steel, aluminium bronze, phosphor bronze and stainless steel. Having been used in industries such as oil refining, soap and the production of manmade fibres for over 75 years, the L range is also ideal for applications in the sugar industry, thanks to its ability to perform well with product of a high viscosity and abrasive nature.

Why choose an Internal Lobe Pump?

Internal Lobe Pumps consist of a pump casing fitted with renewable liners to give them a long life against demanding conditions. Internal Lobe Pumps are extremely proficient at pumping high viscosity liquids at low rotational speeds or low viscosity liquids at synchronous motor speeds, ensuring that the pockets created during the pump rotation are completely filled.


Internal Lobe Pumps operate very quietly and are run by computer generated profiles, allowing for seamless application use. Having been fitted with a replaceable liner and optional full flow relief valves, this pump offers an extremely long life, even when being used with highly abrasive cargo. The pump's jacketed body also allows for steam, oil or electric heating where needed. With the inner and outer rotor shaft mounted eccentrically to one another and supported by bearing, this machine is capable of imparting reciprocation motion and so is smooth and elegant in it's operation. For more detail, see the technical brochure. Our Internal Lobe Pumps have been in use for over 75 years, for a range of executions such as:
  • Heavy crude oil
  • Fuel oil
  • Molasses
  • Sugar syrup
  • Soap
  • Paint
  • Bitumen
  • Grease
  • High viscosity products


  • Internal or external bearings
  • Vertical or horizontal models
  • Reversing flow
  • Available with steam jacket
  • 3:4 rotors typically used for high viscosity product running at low speeds
  • 7:8 rotors typically used for lower viscosity product running at motor speeds
  • Pressures up to 25 bar
  • Capacity up to 350m³/hr