Oilfree – our solutions for sensitive applications
Oil- and germ-free compressed air – causes, problems and solutions
In many production facilities, compressed air comes directly or indirectly into contact with production lines, products or packaging materials. Contamination through residual oil content, micro-organisms and germs then has significant consequences for product quality, consumer safety and market reputation.
Stiftung Warentest reports mineral oils in chocolate, Foodwatch denounces the dangers of food packaging. We are all familiar with reports like these about contamination and deficits in the quality of the final product. And we are familiar with the consequences, too: uncertainty among customers and retail traders, a stir in the press, non-objective discussions and last but not least damage to reputations.
The use of compressed air in areas where human health can potentially be harmed by compressed air makes special requirements on the cleanness of the compressed air. For this reason, it is particularly important.
How does compressed air become oil-contaminated?
There are many ways for contamination factors such as particles, oils, germs and humidity to enter the compressed air. They are often already present in the ambient air and get into the compressed air system through the compressor intake air. The reason for the contamination can be a major road or construction site nearby, for example. The risk of humidity occurring in the compressed air system increases with air humidity in the ambient air.
The contamination presents a double risk: on the one hand, it can impair the function of the compressed air plant and lead to premature wear of plant components, on the other it presents a real risk to the quality of the final product and thus the consumer.
What challenges face the various industries when it comes to oil entry?
Faulty product quality, machine damage, scrap, rework and recall campaigns for industrial goods that are caused by oil breakthrough are less well known to the general public than the problems mentioned above. However, they cause substantial financial damage, particularly in the following branches and applications:
Producing oil-free compressed air
Generally speaking, there are several ways of producing oil-free compressed air. The special requirements must be given careful consideration during planning. This starts with the question of whether oil-free compressed air has to be available centrally or whether treatment can be decentral, since only part of the flow is subject to particularly high requirements.