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.

As the gears rotate they separate on the intake side of the pump, creating a void and suction which is filled by fluid. The fluid is carried by the gears to the discharge side of the pump, where the meshing of the gears displaces the fluid. The mechanical clearances are small— in the order of 10 μm. The tight clearances, along with the speed of rotation, effectively prevent the fluid from leaking backwards.

• Honey | Catchup | Sugar Syrup | Shampoo | Paint | Gum | Glycol | Glycerin etc..