What is difference between hydraulic cylinder And pneumatic cylinder?

1. Working fluid : Pneumatics use air, Hydraulics use Oil

2. Power : Pneumatic power less than hydraulic power

3. Size : P components are smaller than H components

4. Leakage : Leaks in hydraulics cause fluid to be sticking around the components. In pneumatics air is leaked into the atmosphere.

5. Pneuatics obtain power from an air compressor while hydraulics require a pump

6.Air is compressable, hydraulic oil isn't

Hydraulic oil is slightly compressable particularly when air is entrained within it

Hydraulics can also attain power from an air accumulator

PNEUMATIC POWER IS NOT BNECESSARILY LESS THAN HYDRAULIC POWER

THE LOSSES TEND TO BE GREATER IN PNEUMATICS BUT THIS IS DUE TO ENGINEERING RATHER THAN CHARACTERISTICS.

Pneumatics are much easier to configure for control applications

I disagree with answer 3 above, it depends on the application.XD

Miss.godgivenhope@hotmail.com
Pneumatic machines use the power of compressed air to perform work.

Hydraulic machines use the incompressibility of water under pressure to perform work.