Gear pumps are volumetric pumps specially designed for the transfer of liquids, even slightly loaded, with the exception of those containing solids. They are distinguished by their non-pulsating flow, their ability to be reversible and self-priming. Two main technologies are available: internal and external gear pumps.
Internal Gear Pumps
The mechanism of this pump is based on a toothed rotor that drives an idler wheel, separated by a crescent. During rotation, cavities are formed, allowing liquid suction when the teeth separate, and discharge when they approach. Thanks to this principle, these pumps are self-priming, reversible and produce very few pulsations. Available in resistant materials such as cast iron, treated steel or stainless steel 316, they support temperatures up to 300°C. Different sealing options are available (packing, mechanical seal, magnetic coupling), as well as customizable options such as single or double bypass, and partial or complete heating jackets.
External Gear Pumps
These pumps operate through two gears rotating in opposite directions, allowing fluid movement through the pump. Only one shaft is connected to a drive system, while the other is free. External gear pumps are available with three types of gears: spur, helical and herringbone (V-shaped). They can also be equipped with bypass and are capable of reaching pressures above 500 bar depending on applications. As with internal pumps, heating and bypass options are available. These pumps are ideal for a wide range of industrial applications, including the transfer of fluid or viscous liquids, as well as specific versions for low or micro-flow metering.
These gear pumps are versatile, robust and designed to meet high technical requirements in many industries.
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Internal gear pumps for viscous liquids.
Hygienic gear pumps for viscous food and pharma products.