The Comprehensive Flowmeters Resource

How do Oval Gear Flowmeters Work?

The calculated flow volume or flow rate measured by the Oval Gear flow meter is not dependent on the viscosity or density of the fluid unlike many other types of flow measuring devices which measure flow using an inferential principle. Since the volume is consistent in the “chamber areas” the flow measurements are normally very accurate and repeatable. The calculation for flow is not affected by variations in the liquid type since the real volume is being measured repeatedly. As long as the chambers and gears are not compromised or damaged, these flow meters give reliable results.

Oval Gear Presentation

In order to understand how an Oval Gear Meter works it is much easier when a visual presentation is used to explain it. Precisely manufactured pairs of rotors are rotating inside the cavity of the flow meter wetted area. As the oil or chemical enters the gear chamber it immediately populates the open space area between the precision machined gears. Leaks are prevented by machining the parts to certain tolerances and since the fluid passing through is continually “lubricating’” it is not scuffing the inner surface by “sliding” instead. The liquid amounts passing through the Oval Gear flow meter are linked directly to the rotational velocity of the pair of gears.

Common Applications

Common Flow Meter applications include Heavy Fuel Oils, paints, diesel, lubricants and fluids that have a high viscosity.

What about Circular Gear Flowmeters?

Circular Gear Flowmeters work on a similar principle to the oval gear and also have a wide range of applications in chemical flows.

Scroll to Top