Advantages and limitations of fluid power systems. Compare between hydraulic and pneumatic systems.

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 Advantages :

  1. Ease and accuracy of control multiplication of forces
  2. Constant force and torque
  3. Simplicity, safety and economy
  4. High power to weight ratio
  5. Automatic protection against overloads
  6. Greater efficiency and economy due to low friction losses
  7. Relatively smooth and quite operation
  8. Multiplication of forces 
Limitation :

  1. Leakage poses many problems to the operations as well as operators
  2. Fire hazards - Flammable hydraulic fluids may pose fire hazards thus limiting the upper limit of working temperature
  3. Special treatment to hydraulic elements to protect against rust corrosion and dust
  4. Ageing and chemical deterioration of hydraulic fluid
Hydraulic System :

  1. Confined pressurized system that using moving liquids like water,oil
  2. Hydraulic is generally not clean system due to the risk of oil leaks
  3. Hydraulic can smoothly lift and move heavy loads, because the hydraulic oil is not compressible
  4. Hydraulic systems are typically used for high force where stiffness in position is necessary. Hydraulic move relatively slowly but can handle higher loads
Pneumatic System :

  1. Confined pressurized system that use moving compressed gas like air or other gases
  2. Pneumatic offer a very clean system
  3. Pneumatic dose not have the potential force for lifting or moving heavy loads
  4. Pneumatic systems are used for relatively lower forces , faster motion and where stiffness is not required

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