CHARACTERISTIC OF COMPRESSED AIR
It is astonishing that pneumatics could spread so forcibly and rapidly in such a relatively short space of time. Amongs other reasons, this is due to the fact that in some problems of automation no other medium can be used more readily and more economically.
Which, then are the characteristics that so distinguish compressed air?
Amount : Air is available practically everywhere for compression, in unlimited quantities.
Transport : Air can be easily transported in pipeslines even over larger distances. It is not
necessary to return the compressed air.
Storeble : A compressor need not be n in continuos operation. Compressed air can be
stored in and removed from reservoir.
Temperature : Compressed air is insensitive to temperature fluctuations. This ensures reliable
operation, even under extreme conditions of temperature.
Explosion proff: Compressed air offers no risk of explosion or fire, hence no expencive
protection against explosion is required.
Cleanness : Compressed air clean since any air which escapes through leaking pipes or
elements does not cause contamination. This cleanness is necessary, for
example in the food, wood, textile and leather industries.
Construction : The operating components are of simple construction and are therefore
inexpencive
Speed : Compressed air is very fast working medium. This enable high working speeds
to be attained.
Adjustable : With compressed air components, speeds and forces are infinitely variable.
Overload Safe : Pneumatic tool and operating component can be loaded to the point of stopping
and they are therefore overload safe.
In order to be able to accurately defines the areas of application of pneumatics it is also necessary to be aquainted with the negative characteristics.
Preparation : The compressed air needs good preparation.Dirt and humidity may not be
present.
Compressible : It is not possible to achieve uniform and constant piston speeds with
compressed air.
Force requirement : Compressed air is economical only up to a certain force requirement.
Under the normally prevailling working pressure of 700 kPa
( 7 bar/101.5 psi ) an dependent on the travel and speed, the limit is
between 20 000 and 30 000 N. (2000 – 3000 kp)
Exhaust air : The exhaust air is loud. This problem has now however been largely solved due
to the development of sound absorption material.
Costs : Compressed air is a relatively expensive means of conveying power. The high
energy costs are partially compensated by inexpensive components and higher
performance. (Number of cycles)
It is astonishing that pneumatics could spread so forcibly and rapidly in such a relatively short space of time. Amongs other reasons, this is due to the fact that in some problems of automation no other medium can be used more readily and more economically.
Which, then are the characteristics that so distinguish compressed air?
Amount : Air is available practically everywhere for compression, in unlimited quantities.
Transport : Air can be easily transported in pipeslines even over larger distances. It is not
necessary to return the compressed air.
Storeble : A compressor need not be n in continuos operation. Compressed air can be
stored in and removed from reservoir.
Temperature : Compressed air is insensitive to temperature fluctuations. This ensures reliable
operation, even under extreme conditions of temperature.
Explosion proff: Compressed air offers no risk of explosion or fire, hence no expencive
protection against explosion is required.
Cleanness : Compressed air clean since any air which escapes through leaking pipes or
elements does not cause contamination. This cleanness is necessary, for
example in the food, wood, textile and leather industries.
Construction : The operating components are of simple construction and are therefore
inexpencive
Speed : Compressed air is very fast working medium. This enable high working speeds
to be attained.
Adjustable : With compressed air components, speeds and forces are infinitely variable.
Overload Safe : Pneumatic tool and operating component can be loaded to the point of stopping
and they are therefore overload safe.
In order to be able to accurately defines the areas of application of pneumatics it is also necessary to be aquainted with the negative characteristics.
Preparation : The compressed air needs good preparation.Dirt and humidity may not be
present.
Compressible : It is not possible to achieve uniform and constant piston speeds with
compressed air.
Force requirement : Compressed air is economical only up to a certain force requirement.
Under the normally prevailling working pressure of 700 kPa
( 7 bar/101.5 psi ) an dependent on the travel and speed, the limit is
between 20 000 and 30 000 N. (2000 – 3000 kp)
Exhaust air : The exhaust air is loud. This problem has now however been largely solved due
to the development of sound absorption material.
Costs : Compressed air is a relatively expensive means of conveying power. The high
energy costs are partially compensated by inexpensive components and higher
performance. (Number of cycles)
posted by zulaf at 5:16 PM
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