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Gear Pumps

Gear pumps are a type of rotary positive displacement pump, meaning they pump a constant amount of fluid for each revolution. Gear pumps transfer fluid by gears coming in and out of mesh to create a non-pulsating pumping action.

Gear pumps are able to pump at high pressures and excel at pumping high viscosity liquids efficiently. There are no valves in a gear pump to cause friction losses and also high impeller velocities, with resultant friction losses, are not required as in a centrifugal pump. Therefore a gear pump is well suited for handling viscous liquids such as fuel and lubricating oils. Gear pumps are not suited for pumping solids and abrasive liquids.

Internal and external gear drive pumps are the two basic types of gear pumps. Both the internal and external gear pumps have an idler gear that is driven by the driving gear and both use the same method of gears coming in and out of mesh to create a pumping action. The main differences between the two gear pumps are the placement of the gears and where the fluid is trapped.

Allied Pumps carries Industrial Pumps brands such as Envirogear, Ebsray and Corde-KGC and offers a wide range of gear pumps, and has experience and expertise in hundreds of different applications of this type of industrial pump.

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