Air pressure engineering or technology is called Pneumatics in English.
Pneumatics is an engineering technique that uses the air we are using in a compressed or deflated manner for the purpose.

The use of Air

• Using components (mainly oxygen) of air: combustion, breathing action
• Using the physical properties of air: hot air balloon
• Utilizing relative phenomena of flow: parachute
• Using the Physical Phenomena of Flow: Air Curtain
• Using wind force: air transport
• Using the energy of artificially compressed air: Air Brake, Automatic Door Switching, etc.

History of Pneumatic technology

Around 100 B.C. to 100 A.D., weapons, pumps, watches, and Organ began to be used and the ancient Egyptians made fire using this compressed air.
Although it has been used in government work and construction since the 14th century for mechanization of power and improvement of workability, the application of pneumatic technology in the industry is actually from the 1940s to the 1950s, with the invention of the Second Industrial Revolution, the 1850s mining steam drill, the 1880s Air Brake, and the 1927 automatic door opener for vehicles.

• Engine : Power source: motor Engine
• Tank, After Cooler : Generating unit of Pneumatic: Compressor, Tank, After Cooler
  • Fan: discharge pressure below 1Kgf/Cm2
    Fan: Over 0.1Kgf/Cm2
    Blower: Below 0.1Kgf/Cm2
  • Compressor: discharge pressure greater than 1.0Kgf/Cm2
• Clean part of Air : Filter, Mist Sepator, Air Dryer
• Control part : Pressure control, directional control, flow rate control, etc.
• Operating part : Cylinder, Rotary actuator, Air Motor
• Etc : Plumbing material

Compressed air is made from a compressor.
The pressure generated by the compressor is a Gauge pressure of 7 to 10Kgf/Cm2 and, depending on its general purpose, a high pressure of 10Kgf/Cm2 may be used. This point is taken into account because it is subject to the high pressure gas regulation.
In addition, a vacuum pump is used to obtain negative or vacuum pressure.

Compressed air generated from the compressor is not allowed to be used as a normal air pressure source because it causes the following problems under the same conditions.

• Air temperature is high : The compressed air immediately after discharge from the compressor is very hot.
• Dust is plentiful : Dust in the atmosphere is concentrated and contains a large amount of dust.
• Moisturizing : Since the water vapor in the atmosphere condenses, it contains a large amount of water.
• Malicious oil : Compression oil is included due to high temperature.
• The pressure is too high : it is higher than the pressure actually used, so composition is necessary.