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Parker Hannifin has launched a range of hydraulic piston pumps designed to help reduce the size of fan drive systems for both on- and off-highway vehicles and other automotive applications.

Based on the company’s P1 piston pump, the new system features a dedicated proportional pressure control valve, built directly into the pump assembly.

This effectively minimises system size and weight, without affecting overall performance or functionality, and enables design engineers to make best use of the space available on each vehicle.

In addition, as part of the hydraulic fan drive system, the new system contributes to improved fuel efficiency and emission reduction.

Parker’s hydraulic fan drive systems are said to be suitable for cooling heavy equipment, as they offer considerable benefits over belt-driven engine units.

For example, hydraulic systems provide the ability to control fan speed independent of engine speed in order to deliver improved cooling efficiency and fuel economy.

Additionally, the hydraulic fan drive components can be located practically anywhere on the vehicle, where space is available.

To date, however, fan drive systems have generally comprised independent components, with fan speed being varied using a separate proportional pressure valve to control system pressure to the hydraulic motor; although effective, this solution takes up additional space and requires extra hoses and connectors.

To address this issue, Parker has developed versions of its P1 hydraulic piston pump that incorporate proportional pressure valve control as part of the combined pump assembly; this minimises the number of individual parts and the connections required, thereby reducing the overall space envelope and installation and maintenance costs.

The P1 variable displacement axial piston pumps are designed specifically for use with the open circuits found in mobile equipment and are rated for continuous operation at pressures of up to 280bar.

They incorporate a number features to improve performance, reliability and efficiency to ensure that they meet the higher temperatures and pressures generally associated with modern low-emission diesel engines.

These features include low-flow ripple to minimise noise, high-performance tapered roller shaft bearings and low-friction, hydrostatically balanced swash-plate saddle bearings.

Elastomer seals protect against contamination, while standard mounting flanges and ports are said to make installation quick and straightforward.

The new versions of the P1 hydraulic pump with integrated proportional valve control are available in a range of displacements, including 18cc, 28cc, 45cc, 60cc, 75cc, 100cc and 140cc.

Parker Hannifin — Parker Sales UK

With annual sales exceeding $10bn, Parker Hannifin is the world's leading manufacturer of motion and control technologies and systems, providing precision-engineered solutions for a wide variety of commercial, mobile, industrial and aerospace markets.

To meet its customers' needs in motion and control, Parker provides the broadest range of products available from any single supplier. This is supported by expertise in nine major technologies:

  • Hydraulics
  • Pneumatics
  • Electromechanical
  • Filtration
  • Process control
  • Fluid and gas handling
  • Sealing and shielding
  • Climate control
  • Aerospace

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