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
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Pneumatic machines use the power of compressed air to perform work.
Hydraulic machines use the incompressibility of water under pressure to perform work.
Depends entirely on what you're doing.
If it's light weight work - Doors and the likes, pneumatics.
If it's heavy duty work - JCB and construction, hydraulics.
Water is operating medium in Hydraulic Cylinder and Air is operating medium in Pneumatic Cylinder.
Hydraulic works on oil pressure, pneumatic on air pressure.
No. Pneumatic refers to air whereas hydraulic refers to water or other liquids. The behaviour of pneumatics and hydraulics differs because air is more compressible than liquids.
Hydraulic cylinder use a liquid medium, often some type of viscous oil, in the cylinders and can be subject to higher pressures then pneumatic cylinders which use air or some other gas and work under a lower pressure.
Internally, they're pretty much the same. The difference is the operation expected of it - a hydraulic pump converts mechanical energy to fluid energy, whereas a hydraulic motor converts hydraulic energy to mechanical energy.
Take a pushrod and push down on the plunger in the lifter. A hydraulic lifter is spring loaded.
By "Hydrostatic" systems one tends to mean "closed loop hydraulic systems". That is hydraulic systems comprising a pump and motor hwere the pump supplies the motor whose return side supplies the pump. The speed and direction of rotation of the hydraulic motor being changed according to the displacement angle of the variable displacement axial pison pump. "Open loop hydraulic systems" on the other hand comprises various motors often one or more "linear motors" (hydraulic cylinders). When using hydraulic cylinders in hydraulic systems one needs a reservoir to be able to hold the various volume need of the cylinder. (the displacement on the piston side is usually bigger than the rodside). The reservoir needs a "breather" due to the varous displacement needs hence the "open system".
Hydraulic cylinders will be linked to the bath at both ends, as the oil needs to remain pressurised to work effectively.Pneumatic cylinders have springs if they're single way cylinders, as generally they can't rely on gravity to revert back to the first stage - dual cylinders on the other hand have 2 springs so they can switch sides.That aside, the hissing from Pneumatics should just about give it away.
Working fluid. In one it's gas (air) and in the other it's liquid. This is a much bigger difference than it might seem at first, because gases are compressible and liquids, to a very good approximation, are not.
Hydraulic cylinder use a liquid medium, often some type of viscous oil, in the cylinders and can be subject to higher pressures then pneumatic cylinders which use air or some other gas and work under a lower pressure.
hydraulic is liquid based, pneumatic is air.
Any pressure difference is irrelevant. The distinction is in the operating fluid. In pneumatic systems, it's a gas. In hydraulic systems, it's a liquid.
Pneumatic elevators work on air pressure (similar to a bank's drive through suction tubes) and hydraulic elevators work on oil/water pressure.
Hydraulic cylinder use a liquid medium, often some type of viscous oil, in the cylinders and can be subject to higher pressures then pneumatic cylinders which use air or some other gas and work under a lower pressure.
It all comes under Fluid dynamics/mechanics, and it's the same set of symbols for circuits. Many hydraulic symbols will include a drain to the tank. Pneumatic circuits use the atmosphere as their "tank".
Hydrolic are faster and more powerful. They use comressed air.
Working fluid. In one it's gas (air) and in the other it's liquid. This is a much bigger difference than it might seem at first, because gases are compressible and liquids, to a very good approximation, are not.
the main difference between hydraulic and pneumatic system is that hydraulics uses fluid to power their system and pneumatic uses air (in that case air is not a fluid) All matter is made up with all particles. thanks you can see more answer in this web i put these all answer.
actuator is a mechanism that will responds to hydraulic,pneumatic and electrical signal ,it is used to control the valve that to be in open or close condition.
There are many differences, and here are a few: Pneumatic systems use gasses which are compressable - hydraulic uses liquids that are non-compressable. Hydraulics' motion is slow and smooth - pneumatics' motion is quick. Pressure can range from 500 to 5000 psi - pneumatics operate at around 100 psi.