Pumps - Universal

Internal Gear Pumps

The Internal Gear Pump was invented by Viking Pump's founder Jens Nielsen, in 1904.  It is used in manufacturing many of the products that we all touch every day.

WHY?  The internal gear pump is the "workhorse" of countless manufacturing processes.

  • Broadest selection of materials, designs, seals, ports, and displacements.
  • Adjustable clearances enable handling viscosities from 28 to 2,000,000 SSU (1 to 440,000 cSt)
  • Low shear


Typical Applications

Common internal gear pump applications include, but are not limited to:

  • All varieties of refined fuels & lubricants
  • Resins & polymers
  • Alcohols & solvents
  • Asphalt, bitumen & pitch
  • Polyurethane foam (isocyanates, polyols & additives)
  • Food products such as corn syrup, chocolate & peanut butter
  • Paint, inks & pigments
  • Soaps & surfactants
  • Heat transfer fluids

Materials of Construction & Configuration Options

Externals (Head, Casing, Bracket)
Cast iron, ductile iron, steel, stainless steel, and other alloys

Internals (Rotor, Idler)
Cast iron, ductile iron, steel, hardened steel, stainless steel, and other alloys

Bushings (Sleeve Bearings)
Carbon graphite, bronze, hardened cast iron, silicon carbide, tungsten carbide, and other specials materials as needed

Shaft Seal
Lip seals, packing, component mechanical seals, industry-standard cartridge mechanical seals, API 682 seals and sealless magnetic couplings

Advantages to Internal Gear Pumps

Reliable & Easy to Maintain
Only two moving parts

Adjustable End Clearances
For low or high viscosities, high temperatures, or to compensate for wear over time

Shaft Seal Options
Including packing, lip seal, component seal, cartridge seal and sealless mag drive

Porting Options
Viking’s broadest selection of port locations, configurations and types

Smooth, Non-Pulsing Flow
For accurate flow measurement

One Shaft Seal
More reliable and lower cost than two or four seals used on timed lobe and screw pumps

Compact, Close-Coupled Options
For motor speed operation or with gearmotors


Flow Range

to 1,600 GPM
to 363 m3/h


28 to 2,000,000 SSU
1 to 440,000 cST


to 250 PSI
to 17 Bar


-120 to +800 °F
-85 to +430 °C

Key Internal Gear Pump Elements

Internal Gear Pump Features