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  • 28 June 2017
  • News

We have often talked about fluidpower in our news; this time we want to be alternative and we’ll talk about pneumatic, in particular about compressed air systems.


Let’s start from the ABC: what’s an air plant?

A compressed air plant is a distribution system predisposed for compressed air transport from the compressor to the user. The system changes depending on the use or applications. Also, it must be correctly sized, and in this case Oleomec can support you in the planning. Alternatively some software comes in handy, supplied directly by component manufacturers.


What is an air system composed of?

The plant is mainly composed from piping, reductions, links, allocators, exclusion valves and condensate separators. Once the compressed air has been transported to the use, there may be some accessories as wind pipe, spiral and guns for example, over that the direct connection to the machine.


What are piping for and how are they used?

Pipelines are the principal element that composes the plant. The pipelines allow to the air to reach the points of use but it is necessary to pay attention to the falls of pressure, in fact, even at the furthest point the flow of air must be equal in terms of course and pressure (maximum pressure fall 0.3 bar).

The best method to prepare them is to make a closed loop with the main pipeline; from here the necessary leads will start to bring the air to every point. The pipelines furnished by AIGNEP are pipelines in aluminum, of different colors, diameters and weights, and they are available in lengths from 4 and 6 meters. They operate with pressure from -0.99 bar to 16 bar, with temperatures from -20° C to +80° C and they are suitable for vacuum, compressed air and inactive gas as nitrogen and argon.


Can you use reduction and links used in a fluidpower system?

There are some ranges of product dedicated to the compressed air.

The reductions allow to pass from a pipe to another, if there is a change in the dimension of the diameter of the pipe. The links allow the union of more pipeline as well as the change of direction of the same pipe.

The range INFINITY of Aignep is very furnished in this sense. We can find right male links, reductions pipe-pipe, flanged pipe in aluminum league that respect the norm UNI EN 1092-4 PN 16 and ANSI 150-LB, male reductions pipe, right female links, right links, to “L”, to 135° intermediary, links to “L” male-pipe, links to “T”, links and flange for descent and still more.


What are the dispatchers and the valves and what are they for?

The dispatchers and the valves are essential for the connection and the following deviation of the air flow of compressed air. The dispatchers are available in 2 or to 4 ways, in line or tilted.

The valves are available in the ball version, in the full-fledged version with or without padlock, in the butterfly version, in the sphere male-pipe version with or without padlock. The typical product of the Infinity line of Aignep is the Infinity valve. It’s a valve normally closed that uses the present pressure in the duct to open or break the compressed air flow. If not piloted in the correct way, when the pressure in behavior reaches around the 2 bar, in autonomous way, it commute in open valve. Conversely when the pressure goes down under 2 bar independently it closes itself again.

The installation of ball exclusion valves is very useful in the case of maintenance of the plant because they allow to isolate certain sections without provoking losses of pressure.


Why it is recommended to install a condensate separator?

The condensate separators are used to collect the water that is separated from the air and deposited in the pipelines.

The condensate separators can be with automatic or manual discharge. We have a condensate separator with automatic discharge when the glass of harvest, that introduces a certain level of water, automatically discharge itself through the push of the pressure of the air of the link.

The condensate separators with manual discharge work in analogous way but in the inferior part of the cup it is present the maneuverable faucet from the outside.

The first version is recommended if the separators are allocated in a little visible and inaccessible place.


We have seen therefore how a plant of distribution of compressed air is composed but it is possible to enrich the plant with some accessories to increase its functionalities.


Discover the accessories in the next news.