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Pump For Hydraulic

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Typical hydraulic pump applications

This section covers high pressure hydraulic pumps primarily operating on mineral oils.
Applications include:Mobile applications :- from car steering pumps, tractor auxiliary pumps, excavator and
crane pumps to closed loop hydrostatic transmission pumps.
Industrial systems :- from infrequently used low pressure systems such as filling pumps
to high duty, high pressure applications such as steel mills.

Gerotor pumps
up to 70 bar
Low pressure low flow applications. Generally quite and cheap they are mainly used in
lubrication systems or moderately low pressure car or lorry systems.

External gear pumps


up to 210 bar
Low cost, compact design situations. Generally used in low quality hydraulic systems
because they do not have the best volumetric or mechanical efficiency. More importantly
they tend to generate more contamination that other pumps, particularly when they fail.
Life and duty also tend to be less than piston pumps.

Internal gear pumps


up to 210 bar
Similar to external gear pump but are larger in size. Often used for low noise situations but
cost and performance can be limiting.

Vane pumps - fixed and variable displacement


up to 210 bar
Vane pumps are generally used in better quality systems than external gear pumps
because they are cleaner and quieter. They cost less than piston pumps but the variable
displacement designs can still utilise many of the pressure and flow controllers that
variable piston pumps have, making them an ideal option for many low cost applications
requiring good control or operating efficiency.

Axial piston pumps - fixed and variable displacement


up to 315 bar
Axial piston pumps tend to be used for high performance industrial and mobile application.
They are capable of high performance and duty cycles for long periods of time. With few
components that physically touch and therefore wear against each other they do not
generate much contamination.
They also come with a wide range of flow pressure and power controllers.

Radial piston pumps


up to 450 bar
Generally used for very high pressure applications.

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