How It Works: Internal Gear Pump

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In this video, you'll learn what causes an Viking Pump internal gear pump to move liquid through a process. Visit pumpschool.com for more information, and vikingpump.com for more videos!

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The internal gear pumping principle was created by Viking Pump over 100 years ago,
and continues to be one of Viking’s most well-known products.

The internal gear pump is a rotary positive displacement pump that moves fluid
using the rotary motion of the pumping elements.

Liquid enters the suction port between the teeth of the rotor gear - the larger exterior gear,
and the idler gear - the smaller interior gear.

The intermeshing gears of the rotor and idler form locked cavities for the liquid
to ensure volume control.

As the teeth come out of mesh, low pressure zones are created at the suction port,
pulling liquid into the spaces.

The liquid continues to travel through the pump, between the teeth of the gear-within-a-gear principle.

Liquid is prevented from returning to the suction side by the crescent located on the head of the pump,
acting as a seal between the suction and discharge ports.

When the teeth mesh completely, liquid is forced out of the spaces and out of the discharge port.

The internal gear design is capable of handling a wide range of viscosities and provides
unparalleled efficiency.