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Gear Pump Design: Pros and Cons

Gear Pumps

Popular across a wide range of industries and applications, Gear Pumps are a kind of positive displacement pump which utilise the mechanical movement of gears in order to circulate material. The design of Gear Pumps differs, but most will have a number of advantages and disadvantages.

Disadvantages

Gear Pumps through their very design have limitations in terms of the materials which can be used to manufacture them. As they are comprised of a number of rotating parts, that need precision tolerances, this also makes them more expensive to manufacture.

In terms of size, Gear Pumps have a clearly defined Design Envelope and outside of this will have reduced life and ineffective performance. This limits the size of Gear Pumps and makes them unsuitable if bulk flow rates are needed.

The gears themselves generate noise which can make them unsuitable depending on the working environment, and this meshing part makes them unsuitable for solids or abrasive media.

Advantages

Gear Pumps are self-priming in nature and have lower speed which makes them smoother and less disruptive to media. The output of gear pumps is also more controllable and simple to understand. Essentially if you double the speed, you double the output and this output is independent of discharge pressure. It is however possible to manufacture Gear Pumps with a very high discharge pressure with the right configuration. Gear Pumps are better at handling viscous fluids in comparison to their centrifugal counterparts.

Bronte Precision have a wealth of experience in producing parts used in Gear Pumps. This includes parts like Drive Shafts, Drive and Idler Gears, Mounting Flanges and Housing. We can produce parts for Internal, External and Gerotor Pumps. We are based in Bradford, West Yorkshire and fully ISO accredited.