What is Pneumatics?

The word Pneumatics comes from the Greek word Pneumos, meaning breath.  In industry, this deals with the behaviour of gases.  In particular, the use of gases for conveying power.

What is Compressed Air?

Compressed – the air or gas is forced into a smaller space and is always wanting to expand back to its’ original state of lowest energy level.  If a sealed container has its’ volume reduced by 50% or halved then the pressure for the same amount of gas will double. Similarly, reduce the volume to 25% or ¼ and the pressure increases to 4 times the original.  This then gives us a controllable energy source we can use to do useful work.

Compressed air and pneumatic control is now regularly used to replace many manual operations.  This reduces operator injury, from both RSI related issues and by being caught in the workings of the mechanism itself.  Also, production time, costs, quality all benefit from pneumatic automation.  Pull, Push, Lift, Close, Open, Remove, Hold Fast, Operate, Feed, Squeeze – all easily achieved with pneumatics.

Understanding Compressed Air

In this world of instant answers, we often forget the basic scientific principles that the industry we work in is based upon. So, here is a quick reminder of what the Gas Laws are: –

  • Boyle’s Law: –

Boyle’s law states: the product of absolute pressure and volume of a given mass of gas remains constant if the temperature of the gas remains constant.

P1.V1 = P2.V2 = constant, where P = pressure, V = volume

  • Charles Law: –

Charles’ law states: for a given mass of gas at constant pressure the volume is proportional to the absolute temperature.

V1/T1 = V2/T2 = c, where V = volume, T = temperature (in Kelvin)

  • General Gas Law: –

The General Gas Law is a combination of Boyle’s law and Charles’ law where pressure, volume and temperature may all vary between states of a given mass of gas but their relationship result in a constant value.

(P1.V1)/T1 = (P2.V2)/T2 = constant

Other Laws to consider include Gay-Lussac’s Law and Avogadro’s Law.

If you’d like to learn more about pneumatics, why not take our course – A Foundation in Pneumatics? More information here.



The Airlane Solution

We work throughout the North East of England and are based in Sunderland.

For more information contact Gary at gary.conlin@airlane.co.uk or visit www.airlane.co.uk

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© Gary Conlin 2018

Making Pneumatics Work for You in the North East of England.

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