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Rotary Gear PumpsA rotary gear pump employs a positive displacement principle as they feature a casing in which an outer rotor gear as well as an internal idler gear and crescent assembly is housed. Although the rotary gear pump handles solid and abrasive material well, the pump can also handle shear sensitive fluids with a gentle non pulsating flow owing to the cumulative, smooth delivery of the gear teeth meshing. The flow is directly proportional to the speed, independent of the pressure, thus providing a greater control and reliability to the service operator. Due to the shape of the gears and how they are assembled, it is able to handle high temperatures and system pressures. Typically an rotary gear pump excels at handling viscous fluids and are also used commonly on lower viscosity fluids where a constant flow is required at high pressure such as feeding a burner system with diesel fuel.
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