Hydraulic gear pumps are vital in various industries. 

Casappa , an Italian company founded in 1952, produces a wide range of hydraulic gear pumps and motors, including the Polaris, Whisper, Kappa, and new Kappa compact series. These products are used in agriculture, on-highway vehicles, construction, and materials handling. 

Marzocchi , established in 1961, is known for its high-quality external gear pumps and motors. The ELIKA series, for example, is characterized by extremely low noise levels and high efficiency, making it suitable for applications where screw pumps, vane pumps, or internal gear pumps are commonly used. 

Ronzio , though less well-known, also offers reliable hydraulic gear pumps. 

Parker and Rexroth are industry giants, providing a variety of hydraulic gear pumps that are widely used in industrial and mobile equipment. 

Hydraulic gear pumps are commonly used in construction machinery, agricultural equipment, automotive power steering systems, and manufacturing machinery.

Hydraulic gear pumps are widely used in mobile equipment due to their reliability, efficiency, and ability to provide consistent hydraulic power. In construction equipment, such as excavators, loaders, and bulldozers, hydraulic gear pumps are essential for tasks like digging, lifting, and moving heavy materials. They provide the hydraulic power needed to operate the boom, stick, and bucket of an excavator, enabling precise and strong movements. In material handling equipment, like forklifts and stackers, these pumps ensure the stable and long-term use of the equipment by providing high torque performance in extreme environments. In agricultural machinery, such as tractors and harvesters, hydraulic gear pumps are used to control the movement of equipment like plows and harvesters, significantly improving productivity. Additionally, in the automotive industry, hydraulic gear pumps are used in power steering systems to enhance steering performance by allowing the flow of power steering fluid, typically operating at pressures between 1000 psi and 4000 psi depending on the vehicle's requirements. These applications highlight the versatility and importance of hydraulic gear pumps in mobile equipment.

Selection of Hydraulic Gear Pumps

Displacement : Select the appropriate displacement based on the required flow rate and operating speed. Larger displacements can provide higher flow rates at lower speeds, while smaller displacements may be suitable for higher speed applications.

Pressure Rating : Ensure that the pump's pressure rating meets the requirements of the hydraulic system. Hydraulic gear pumps typically have pressure ratings ranging from 500 PSI to over 4000 PSI.

Viscosity Range : Consider the viscosity range of the hydraulic fluid. Gear pumps generally work best with viscosities between 10 to 2000 centistokes (cSt).

Efficiency : Choose a pump with high overall efficiency to minimize energy consumption and heat generation. Typical overall efficiencies for hydraulic gear pumps range from 80% to 90%.

Temperature Tolerance : Make sure the pump can operate within the required temperature range, which may be from -20°C to +100°C (-4°F to +212°F).