Internal Gear Pumps

The internal gear pumping principle was invented by Jens Nielsen, one of the founders of Viking Pump. It uses two rotating gears which un-mesh at the suction side of the pump to create a vacuum which pulls fluid into the pump. The spaces between the gear teeth transport the fluid on either side of a crescent to the discharge side, and then the gears re-mesh to discharge the fluid.


  • Reliable and Easy to Maintain - Only two moving parts.
  • Adjustable End Clearance - For low or high viscosities, high temperatures, or to compensate for wear over time.
  • Shaft Seal Options - Including packed gland, lip seal, component seal, cartridge seal and sealless mag drive options.
  • Porting Options - Viking's broadest selection of port locations, configurations, and types.
  • Minimal Pulsation - For accurate flow measurement.
  • One Shaft Seal - More reliable and lower cost than two used on timed lobe and screw pumps.
  • Compact, Close-Coupled Options - For motor speed operating or with gear motors.

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