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Category: General

What Power Pack is right for me?

Hydraulic power units are used for a broad range of applications from operating control valves in the outback of Australia to raising parking barriers in Siberia. To match this range of applications there are an equally large range of hydraulic systems and products. Whether you are designing, specifying, manufacturing or purchasing a hydraulic power pack…
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How does a simple hydraulic system work?

The science behind hydraulics is called Pascal’s principle. Essentially, because the liquid in the pipe is incompressible, the pressure must stay constant all the way through it, even when you’re pushing it hard at one end or the other. Now pressure is defined as the force acting per unit of area.

What micron rating do I need for my application?

The ISO cleanliness code publishes a recommended cleanliness guideline for typical hydraulic system components; however, always check component manufacturer recommended ratings.

What is the difference between absolute and nominal ratings?

Nominal rating usually means the filter can capture a given percentage of particles of a stated size (e.g. 50% @ 10 micron). Absolute rating is the smallest typical particle size retained by a filter media at 98+% efficiency. This is also referred to as the Beta=75 or 98.67% efficiency rating.

In mobile hydraulics, where is the filter located?

On a mobile hydraulic system, the filter or filters can be located in several different areas based on the system’s design and intended use. The most common locations are: Suction side – a strainer on the end of the pick-up line in the reservoir or a filter in the line between the reservoir and the…
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What is the difference between ISO and SAE ratings?

There is no significant difference between ISO (International Standards Organisation) or SAE (Society of Automotive Engineering). Both organisations provide test standards to allow the ability to reliably compare published filter ratings among manufacturers.

What will overheating do to my hydraulic oil ?

How hot is too hot for a hydraulic system? It depends mainly on the viscosity and viscosity index (rate of change in viscosity with temperature) of the oil, and the type of hydraulic components in the system. As the oil’s temperature increases, its viscosity decreases. Therefore, a hydraulic system is operating too hot when it…
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Changing filters/Elements ?

If you change your filter elements based on schedule, you’re changing them either too early or too late. If you change them early, before all their dirt-holding capacity is used up, you’re wasting money on unnecessary filter changes. If you change them late, after the filter has gone on bypass, the increase in particles in…
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What micron rating do I need for my application?

The ISO cleanliness code publishes a recommended cleanliness guideline for typical hydraulic system components; however, always check component manufacturer recommended ratings.

What is the difference between absolute and nominal ratings?

• Nominal rating usually means the filter can capture a given percentage of particles of a stated size (e.g. 50% @ 10 micron). Absolute rating is the smallest typical particle size retained by a filter media at 98+% efficiency. This is also referred to as the Beta=75 or 98.67% efficiency rating.