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Pascal’s Law of Hydraulics Is the Foundation for Hydraulic Systems

Without Pascal’s Law of Hydraulics, it is hard to imagine how hydraulic systems would have continued to advance and develop over the past several centuries. In the 17th century, Pascal theorized if force was applied to fluid at rest in a container, the resulting pressure would be equally applied in all directions throughout the container.

Pascal’s theory resulted in what we know today as Pascal’s Law. This law essentially means pressure (P) is equal to the force (F) applied, divided by the area (A), on which it applied:

• P = F / A

In hydraulic systems, the pressure generated by the hydraulic pump results in the same increase in pressure throughout the system.

If within the system there are two hydraulic cylinders of different diameters, one has a piston surface area ten times that of the first, then the potential force from the larger cylinder will be ten times that of the smaller. However, the pressure acting on each unit of piston surface area will be exactly the same for both pistons.

Using the basic equation above, it is easy to determine what force or area is needed for your hydraulic systems:

• F = P x A
• A = F / P

In other words, if you know at least two of the variables, you can easily solve for the unknown. This can be beneficial when selecting the correct hydraulic pumps when designing and creating a reliable hydraulic system.

For assistance in determining the right hydraulic pumps, motor, parts, and components you need for your hydraulic systems, please feel free to contact White House Products Ltd. at +44 (0) 1475 742500 today! We can even custom build solutions to fit your specific needs.

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