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Oily fumes and mists are potentially hazardous emissions to human health, which are generated as a result of friction and heating of particular substances such as coolant-lubricant oils used in multiple industrial processes, especially in the metalworking industry.
Current regulations require the prompt removal and filtration of these fumes in order to maintain a healthy working environment and prevent damage to workers' health.
It is possible to divide the emission removal process into two phases ideally: extraction and filtration, guaranteed in two steps by a single plant.
Extraction of oil mists is provided by special fans that, connected to pipe and duct systems, capture the fumes locally and convey them to filtration equipment.
Compared to the actual filters, the other elements used to extract oil mists are often underestimated. However, the relevant regulations also provide specific requirements for fans, ducts and pipes, and the correct installation of these can provide significant benefits:
Filtration is the most important step in the process of removing harmful elements, as it is crucial in lowering the concentration of oil mists below the threshold considered hazardous. Oily fume filtration can be done in various ways, employing different technologies that provide varying degrees of efficiency in separating oily particles from the air stream.
SO.TEC employs one of the most efficient technologies currently known: coalescing filtration. We elaborate in the following paragraphs on the principle behind this technology and the actual operation of the filters that are based on it.
Coalescence is a natural principle that occurs when particles of a liquid, such as water or oil, aggregate to form larger droplets. Coalescence is a completely spontaneous phenomenon, which is easy to observe when, for example, we watch raindrops coming together on the glass of a window or car.
How to take advantage of coalescence in the filtration of oily fumes and mists? The basic idea is very simple: when a liquid aggregates by coalescence, the resulting droplets increase in weight until they spontaneously precipitate downward, thereby separating from the air stream.
If the aggregation of oil particles suspended in the air can be promoted, the result is thus the separation of the oil itself from the filtered air: this is the work of coalescing filters.
The phenomenon of coalescence offers incredible possibilities in the development of equipment for the filtration of mists and oily fumes, precisely because it is a physical phenomenon that is perfectly suited to these purification needs. This is precisely how the first SO.TEC coalescing filters were born, designed specifically with special fiberglass candles that serve two main functions:
Once aggregated, oil droplets reach a critical weight that causes them to slide downward. Filters are configured to collect the precipitating droplets in special tanks, allowing the oil to be recovered and possibly reused in production processes.
Today, coalescing filtration equipment technology for oily mists is also on the market thanks to SO.TEC's systems, which provide wide-ranging suction flow rates and effectiveness approaching 100 percent.
The phenomenon of coalescence offers incredible possibilities in the development of filtration plants for oily mists and fumes, precisely because it is a physical phenomenon that is perfectly suited to these purification needs.
Our coalescing filters, specifically designed with special fiberglass candles fulfill two main functions:
Once aggregated, the oil droplets reach a critical weight that forces them to slide down. Filters are configured to collect the precipitating droplets in special tanks, allowing the oil to be recovered and possibly reused in production processes.
Our oil mist treatment systems provide wide-range suction flow rates and filtration efficiency approaching 100 percent.
Let's see together what systems we can bring to your company to best secure your work environment and your employees:
SO.TEC coalescing filters boast a quality of construction that guarantees very high filtration efficiency of oily mists and fumes. The results obtained far exceed the limits imposed by current regulations, ensuring a working environment that is not only up to standard, but highly healthy and clean, with positive repercussions on the efficiency of operators and other machinery.
SO.TEC oil mist filters, in fact, have a separation efficiency of:
SO.TEC offers three main coalescing filters for oily mists:
Discover all the benefits of our oil mist filters
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Mini-Max oil mist filters are used for applications requiring low suction flow rates (500 to 8,000 m3/h per filter) and installation versatility because they can be installed either inside or outside the production area.
These filters are equipped with two stages of oil mist filtration , plus an optional third stage that aspirates air and cleans it through effective HEPA filters.
They are used mainly:
Unlike the previous oil mist filters, the Mini-Max Plus and vertical development filters have a higher suction capacity (up to 10,000 m3/h for the Plus and up to 15,000 m3/h for the vertical one), and in the case of the Mini Max Plus model , the electric fan is incorporated and sound-proofed inside the machine's carpentry.
These systems are also versatile and can be installed in different industrial areas. The difference between the Mini-Max Plus model and the vertical development model lies in the fact that the latter oily fume filter features a vertical arrangement of the internal filter elements.
The fields in which these filters are most widely used are:
The super-compact filtration plants for oily fumes have high filtration efficiency with suction flow rates up to and over 180,000 m3/h in a single solution. They are equipped with the coalescing technology with fiberglass candles that allows the pollutant to be removed from the air stream and the oil (and graphite or any airborne impurities) to be recovered with the possibility of reuse.
There are two stages of oil mist filtration in this filter as well: the first for particles larger than 1 micron; the second by using Microless® coalescing filters, which provide reduced emission values.
Their use is mainly:
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