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As the term Fluid refers either to gases or to liquids, fluid power is also subdivided into the categories of Hydraulics and Pneumatics . The differences being that with hydraulics the medium used is a liquid (ie mineral oil or water) and for pneumatics it is a gas (ie air or another inert gas). PRACTICAL USE In practice fluid power is used to achieve one of two generic tasks: Transport fluid Delivering the fluid from one location to another to achieve a useful purpose. An example of this in the case of hydraulics in a lube oil or grease system to provide oil or grease to lubricate bearings on heavy equipment. Transport energy In this case the fluid flow is used to actuate a device specifically designed to operate from the flow provided. In general, these Actuator s fall into the following categories:
can be described as fluid motors either a cylinder (providing a linear output force/motion) or motor (providing a continuous rotary output) or a rotary actuator which provides rotary output often limited to less than 360 degrees. APPLICATION Hydraulics and pneumatics are similar in many ways, but there are clear reasons for using one over the other.
REFERENCE Esposito, Anthony, ''Fluid Power with Applications'', ISBN 0-13-010225-3 SEE ALSO
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