Hydraulic Gear Pumps

A hydraulic gear pump functions as a vital component within hydraulic systems by converting mechanical energy into hydraulic energy by moving hydraulic fluid through the pump assembly, often in conjunction with an engine or electric motor.   Gear pumps are used in a wide range of hydraulic systems; in fact, they are easily among the most common types of pumps seen in this type of equipment. Hydraulic gear pumps are of a fixed displacement design and operate by means of a prime mover such as an engine or motor to pump the fluid.

Although there are several uses for gear pumps and significant variations in gear pump components, their basic design and theory of operation is as follows. Every pump includes two (sometimes more) rotating gears whose teeth interlock. The rotation of the drive shaft turns the drive gear, which, due to the intermeshing design, also puts the other gear into motion. Hydraulic gear pumps do not create a   trong suction, so they operate best with a flooded inlet. A gear pump can be run in a clockwise,  anti-clockwise  or bi-rotational direction but is most efficient when driven in the single direction it was built and tested in..

These pumps are constructed from diverse materials such as cast iron, aluminium, steel, and even plastics or composites, each chosen based on the durability, fluid compatibility, and operating pressure requirements of the system. Hydraulic pump applications span a variety of industries, including the agriculture, marine, mining, and construction sectors, where their ability to handle heavy-duty tasks in service vehicles and other types of heavy equipment is extremely useful.

Whether operating within the tightly controlled environment of industrial machinery or enduring the harsh conditions of outdoor agricultural equipment, hydraulic gear pumps are essential. Their versatility and reliability enable a wide range of applications, such as lifting and moving materials in construction sites, driving the hydraulic systems of commercial ships, and providing the muscle behind mechanised operations in farming—all with the might of fluid power.

Hydraulic gear pumps come in several different types:

Internal gear pumps – This type of pump utilises a “gear inside a gear” design. As the gears rotate in the same direction, the space between them varies in a controlled manner, resulting in displacement of the fluid. Internal gear pumps are noted for their relatively quiet operation and ability to manage thick fluid.

External gear pumps – These pumps have two intermeshed gears arranged side by side, one of which is connected to the drive shaft. Rotating the drive shaft creates motion in the gears and creates a flow path on the outside of each gear. An external gear pump can operate effectively at a variety of speeds and with a range of fluid viscosities. Their main advantages are simplicity, size-to-power ratio, and price-to-power ratio.

What can a hydraulic gear pump do that other pumps cannot?  For the most part, hydraulic gear pumps offer precise output control that isn’t possible with centrifugal pumps, for example. Increasing or decreasing the speed of the prime mover will increase or decrease the output flow rate. Hydraulic gear pumps are normally made to only run in one rotation; however, this can normally be changed if required.

Hydraulic internal gear pumps are normally more expensive than external gear pumps  they are also quieter as well—which can be a strong selling point in environments where extraneous noises cannot be tolerated.   All gear pump types are easily damaged by contaminated fluid making filtration vital in circuits where they are used.

White House Products is not just A Leading Hydraulic Gear Pump Distributor

White House Products Ltd carries high-quality hydraulic equipment from today’s leading gear pump manufacturers, including Eaton, Bosch Rexroth, Parker, Permco, Danfoss / Turolla, KYB, Shimadzu, David Brown / Hydreco, and many more. Here you can also find a variety of genuine parts that can be used as components in hydraulic power packs and other types of equipment. 

Apart from providing replacement pumps from leading manufacturers, White House Products also manufactures its own range of gear pumps. This means that  we can supply you  with gear pumps and motors to the exact specification you require.   This service comes into its own  for prototypes and also  when a special port configuration is required.   It may also just be that a 2-3 day delivery  at a very competitive price from White House Products is considerably quicker  and cheaper than that quoted by one of the better known manufacturers.

We invite you to explore the hydraulic pump replacement components that we have listed in this section.