Hydraulics

head loss: definition, equation, frictional head loss, Hydraulic Head

Head Loss: What It Is and How to Calculate It

Head loss is potential energy converted into kinetic energy. Head loss is defined as the pressure loss due to viscous effects over a certain distance of pipe for an incompressible fluid, also including the additional losses accrued by fixtures etc. Head loss cannot be avoided in real fluids, and its importance is relative to the …

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hydraulic-fluid-selection-hydraulic hose and valve fitting use at slide core for die casting mold on table

Hydraulic Fluid Selection Guide

Hydraulic fluid is a versatile, multi-function necessity for machinery everywhere. You would be hard pressed to find a machine that doesn’t require hydraulic fluid to maintain performance and reduce component wear as hydraulic systems are hard on the parts within them. As a business that operates machinery, there is also the requirement to comply with …

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Needle Valves – function and selection criteria

Needle valves are used to accurately control flow rate. They are also suitable as reliable shut off valves. Common sizes are from 1/8” up to 2”. Adjustments are gradual and smooth. A disadvantage of needle valves is the relatively large pressure drop. Function of needle valves Needle valves have a long-threaded plunger with a needle-shaped …

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Factors favouring Pneumatics over Hydraulics

The choice between a hydraulic and pneumatic system is a very complicated question which each and every system design engineer will have to face at-least once in their lifetime. A knowledge of hydraulic & pneumatic systems would benefit most design engineers in their professional journey. This article will help you to understand the situations in …

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aircraft landing gear - hydraulics

Hydraulics vs Pneumatics – an introduction

Have you ever wondered why the landing gears of Boeing 787 Dreamliner (and in fact all commercial aircrafts) use hydraulics and not electronic or mechanical power transmission? The reason is that unlike most mechanical and electrical systems, “fluid power systems” (hydraulics and pneumatics) are more reliable and are better able to withstand shock and dampen …

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Hydraulic Systems Components: Part 1

Hydraulic systems are everywhere in mechanical systems and made of a variety of standard components. With properly located and perfectly designed components, the hydraulic system should generate a minimum of heat (waste energy) and operate with minimum maintenance. In this article we will look over some of the primary systems that make up a hydraulic …

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Boeing 747 Landing Gear Design

When it comes to aircraft, hydraulic systems are often the preferable choice when compared to electrical and mechanical systems. This is certainly the case with the Boeing 747 landing gear. However, this still leaves the question: why would we not use a pneumatic system instead of hydraulics? Compared to hydraulics, pneumatic systems offer several advantages: Hydraulic systems requires oil …

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