Omega Air AAF compressed air filters up to 16 bar
AAF filters from the Slovenian manufacturer Omega Air remove solid contaminants, water, oil, oil vapours and odours from compressed air up to 16 bar. Elements of different fineness fit into the same housing, depending on the ISO 8573-1 purity you need.
The range has 15 sizes with G 1/4" to 3" threads and flows of 417 to 46,000 l/min at 7 bar. You choose the filtration stage, the size according to the flow, and then the condensate drain, clogging indication and connection kits. The range is one of the Omega Air industrial filters.
Filtration stages and accessories
Each tile leads to a stage with a table of sizes, spare elements and flows.
Filtration stages at a glance
The ISO 8573-1 class is written as solid particles – water – oil. The pressure drop applies to a new element; the element is replaced according to the pressure drop or after a set time.
| AAF filtration stages | |||||||
|---|---|---|---|---|---|---|---|
| Stage | Filtration rating | ISO 8573-1 class | Residual oil | Pressure drop of a new element | Element replacement | Temperature up to | Condensate drain |
| AAFC cyclone separator | – | x-x-x | – | – | 12 months | +65 °C | AOK16B float drain |
| AAFB coarse filter 15 µm | 15 µm | 7-x-x | – | 20 mbar | 12 months | +65 °C | AOK16B float drain |
| AAFP basic filter 3 µm | 3 µm | 6-x-x | – | 10 mbar | 350 mbar | +65 °C | AOK16B float drain |
| AAFR dust filter 1 µm | 1 µm | 3-x-x | – | 20 mbar | 350 mbar | +65 °C | AOK16B float drain |
| AAFM fine pre-filter 0.1 µm | 0.1 µm | 2-x-2 | < 0.1 mg/m³ | 50 mbar | 350 mbar | +65 °C | AOK16B float drain |
| AAFS microfilter 0.01 µm | 0.01 µm | 1-x-1 | < 0.01 mg/m³ | 80 mbar | 350 mbar | +65 °C | AOK16B float drain |
| AAFA activated carbon | – | 1-x-1 | < 0.005 mg/m³ | 60 mbar | 6 months | +45 °C | MCD manual drain |
| AAFA2 activated carbon adsorption filter | – | 1-x-0 | < 0.005 mg/m³ | 60 mbar | 6 months | +45 °C | MCD manual drain |
| AAFH2 catalytic filter | – | 1-x-x | < 0.005 mg/m³ | – | 6 months | +45 °C | MCD manual drain |
| AAFMS2 molecular sieve | – | 1-x-x | – | – | 6 months | +45 °C | MCD manual drain |
Solid particle class 1 for stages A, A2, H2 and MS2 only applies when an S microfilter is installed before them. Elements P to S are replaced at a pressure drop of 350 mbar, at the latest after 12 months or 4,000 operating hours.
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How to read the ISO 8573-1 purity class
The ISO 8573-1 standard describes the purity of compressed air with three numbers: solid particles, water and oil. The lower the number, the cleaner the air. The letter x means that the filter does not determine that component.
The AAFS microfilter with class 1-x-1 thus ensures the highest purity for solid particles and oil, but it does not deal with humidity. Filters only trap water that has already condensed. Water vapour is removed by a compressed air dryer.
How to put the filtration together
The stages are arranged from coarse to fine in the direction of flow: cyclone separator, coarse filter B, basic P, dust R, fine pre-filter M, microfilter S and finally the activated carbon, adsorption, catalytic or molecular sieve stage. The AAFC cyclone separator goes directly after the compressor, where it removes liquid water.
The fine pre-filter M goes before the microfilter S. An S microfilter always goes before the activated carbon, adsorption, catalytic and molecular sieve stages. Only with it does solid particle class 1 apply, and the activated carbon does not receive oil droplets — it must not work in an oil-saturated environment.
The AAFMS2 molecular sieve is installed as a safeguard for the time when the adsorption dryer is stopped and moisture would otherwise get into the air line.
Filter sizes
The size number is the flow in Nm³/h at 7 bar — the AAFP-120 filter therefore has a flow of 120 Nm³/h. All stages of the same size have the same thread and flow.
The smallest size, 25, is 145 mm tall; the largest, 2760, is almost a metre. You will find the dimensions and weight of each size on the product page of the filter.
| AAF filter sizes | |||||
|---|---|---|---|---|---|
| Size | Connection | Nm³/h at 7 bar | l/min at 7 bar | Stages | Connection kits |
| 25 | G 1/4" | 25 | 417 | P · R · M · S · A | M series |
| 30 | G 3/8" | 30 | 500 | P · R · M · S · A | M series |
| 35 | G 1/4" | 35 | 583 | B · P · R · M · S · A | L series |
| 60 | G 3/8" | 60 | 1,000 | C · B · P · R · M · S · A | L series |
| 78 | G 1/2" | 78 | 1,300 | C · B · P · R · M · S · A · A2 · H2 · MS2 | L series |
| 120 | G 3/4" | 120 | 2,000 | C · B · P · R · M · S · A · A2 · H2 · MS2 | L series |
| 198 | G 1" | 198 | 3,300 | C · B · P · R · M · S · A · A2 · H2 · MS2 | XL series |
| 335 | G 1" | 335 | 5,583 | B · P · R · M · S · A · A2 · H2 · MS2 | XL series |
| 510 | G 1 1/2" | 510 | 8,500 | C · B · P · R · M · S · A · A2 · H2 · MS2 | XL series |
| 780 | G 1 1/2" | 780 | 13,000 | B · P · R · M · S · A · A2 · H2 · MS2 | XL series |
| 1000 | G 2" | 1,000 | 16,667 | C · B · P · R · M · S · A | – |
| 1500 | G 2" | 1,500 | 25,000 | C · B · P · R · M · S · A | – |
| 1680 | G 2 1/2" | 1,680 | 28,000 | B · P · R · M · S · A | – |
| 2160 | G 3" | 2,160 | 36,000 | C · B · P · R · M · S · A | – |
| 2760 | G 3" | 2,760 | 46,000 | B · P · R · M · S · A | – |
Stages A2, H2 and MS2 come in sizes 78 to 780, coarse filter B from size 35 and cyclone separator C in eight sizes. Connection kits cover sizes up to 780. You will find the dimensions and weight on the product page of each filter.
Flow at a different pressure
The flows apply to a pressure of 7 bar, an ambient temperature of +20 °C and an air inlet temperature of +35 °C. At a different pressure, multiply the flow by the correction factor: at a lower pressure the filter passes less air, at a higher pressure more.
Example: the AAFP-120 has a flow of 2,000 l/min at 7 bar, 2,000 × 1.38 = 2,760 l/min at 10 bar and only 1,500 l/min at 5 bar.
| Flow correction factor by pressure | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pressure (bar) | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Factor | 0.38 | 0.50 | 0.63 | 0.75 | 0.88 | 1.00 | 1.13 | 1.25 | 1.38 | 1.50 | 1.63 | 1.75 | 1.88 | 2.00 | 2.13 |
Condensate drain and clogging indication
AOK16B float drain
In stages C to S, it drains the condensate from the bowl on its own.
MCD manual drain
In stages A, A2, H2 and MS2, the condensate is drained manually.
Clogging indication
A pressure drop indicator on the filter head tells you when to replace the element.
Stages C to S have an AOK16B float drain in the bowl, which drains the condensate on its own. Stages A, A2, H2 and MS2 have an MCD manual drain.
Another drain can also be fitted to the filter housing — manual, float, timed or electronic. You will find them among the condensate drains for filters.
When to replace the element is shown by the clogging indicator or differential pressure gauge on the filter head: elements P to S are replaced at a pressure drop of 350 mbar.
Joining and mounting
AAF-S connection kits
Join 2 or 3 filters into one bank through the holes in the head.
AAF-W kits with brackets
They also include 2 brackets for wall mounting, even for a single filter.
Wall-mounted bank
Filters joined in series and fixed with brackets.
Filters up to size 780 can be joined with connection kits into a bank of 2 or 3 filters through the holes in the head. AAF-W kits also contain 2 brackets for wall mounting, even for a single filter. The kits come in three series: M for sizes 25 and 30, L for 35 to 120 and XL for 198 to 780.
Filter housing
The housing is made of aluminium, the screws of steel, the top part of the cover of ABS and the seals of NBR. An external cataphoretic coating and X2-COAT protection guard against corrosion, and the AVELOCK system holds the element firmly on the aluminium ribs, so vibration and pulsation cannot damage it.
The housing without element (head and bowl, for example AAF-78T) is for your own combination: you choose the element of any stage separately.
Other filters
For larger flows with flange connections there are BF high-capacity filters, and for pressures up to 50 bar HF high-pressure filters. You will find the whole range among the industrial compressed air filters.
Ventilek’s tip
Always an S microfilter before activated carbon. Activated carbon in an oil-saturated environment is quickly spent. The AAFS microfilter traps the oil droplets, and the carbon then only deals with vapours and odours.
- Which filtration stage do I need?
- It depends on the ISO 8573-1 purity class you require. Coarse contaminants are trapped by B (class 7), basic filtration is provided by P (class 6), dust by R (class 3), fine particles and oil by M (2-x-2) and S (1-x-1). Oil vapours and odours are removed by activated carbon A.
- How do I choose the size?
- By flow: the size number is the flow in Nm³/h at 7 bar. At a lower pressure the flow drops — multiply it by the correction factor from the table.
- How often should the element be replaced?
- Elements P to S at a pressure drop of 350 mbar, at the latest after 12 months or 4,000 operating hours. Activated carbon, adsorption, catalytic and molecular sieve elements within 6 months at the latest.
- Does the filter remove moisture from the air?
- It traps water that has already condensed, but not water vapour — for dry air you need a dryer.
- What pressure and temperature can the filters withstand?
- Working pressure up to 16 bar. Temperature +1.5 to +65 °C, for stages A, A2, H2 and MS2 up to +45 °C.
- Is the H2 catalytic filter suitable for breathing air?
- Stage H2 removes CO and CO₂ to the level of breathable air. B-AIR filters are also designed for breathable air.
Product sorting
List of products
With a G 1" thread and a flow of 3,300 l/min at 7 bar, the AAFC-198 cyclone separator removes liquid water directly after the compressor. Working pressure up to 16 bar.
With a G 3/8" thread and a flow of 1,000 l/min at 7 bar, the AAFM-60 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil; residual oil is below 0.1...
Spare cyclone element AAFC-510V for the AAFC-510 cyclone separator. Recommended replacement every 12 months or 4,000 operating hours.
With a G 1 1/2" thread and a flow of 8,500 l/min at 7 bar, the AAFC-510 cyclone separator removes liquid water directly after the compressor. Working pressure up to 16 bar.
With a G 1/4" thread and a flow of 583 l/min at 7 bar, the AAFS-35 microfilter traps particles larger than 0.01 µm, water and oil; residual oil is below 0.01 mg/m³. Working...
With a G 1" thread and a flow of 3,300 l/min at 7 bar, the AAFP-198 basic filter traps solid contaminants and dust particles larger than 3 µm. Working pressure up to 16 bar.
Spare element AAFM-35V for fine pre-filters AAFM-35 and AAFM-60. Recommended replacement every 12 months or 4,000 operating hours.
With a G 1" thread and a flow of 3,300 l/min at 7 bar, the AAFA-198 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
Spare cyclone element AAFC-120V for the AAFC-120 cyclone separator. Recommended replacement every 12 months or 4,000 operating hours.
Spare cyclone element AAFC-198V for the AAFC-198 cyclone separator. Recommended replacement every 12 months or 4,000 operating hours.
Spare cyclone element AAFC-78V for the AAFC-78 cyclone separator. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFP-510V for basic filter AAFP-510. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFMS2-120V for molecular sieve filter AAFMS2-120. Recommended replacement within 6 months at the latest, earlier depending on use.
With a G 1/2" thread and a flow of 1,300 l/min at 7 bar, the AAFR-78 dust filter traps smaller solid contaminants and dust particles larger than 1 µm. Working pressure up to 16...
Spare element AAFP-78V for basic filter AAFP-78. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFR-335V for dust filter AAFR-335. Recommended replacement every 12 months or 4,000 operating hours.
With a G 1/4" thread and a flow of 583 l/min at 7 bar, the AAFA-35 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
With a G 3/8" thread and a flow of 1,000 l/min at 7 bar, the AAFP-60 basic filter traps solid contaminants and dust particles larger than 3 µm. Working pressure up to 16 bar.
With a G 1/2" thread and a flow of 1,300 l/min at 7 bar, the AAFC-78 cyclone separator removes liquid water directly after the compressor. Working pressure up to 16 bar.
Spare element AAFP-120V for basic filter AAFP-120. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFS-335V for microfilter AAFS-335. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFA-120V for activated carbon filter AAFA-120. Recommended replacement within 6 months at the latest, earlier if the oil content is higher.
Spare element AAFA-78V for activated carbon filter AAFA-78. Recommended replacement within 6 months at the latest, earlier if the oil content is higher.
Spare element AAFR-120V for dust filter AAFR-120. Recommended replacement every 12 months or 4,000 operating hours.
Spare cyclone element AAFC-1000V for the AAFC-1000 cyclone separator. Recommended replacement every 12 months or 4,000 operating hours.
Spare cyclone element AAFC-1500V for the AAFC-1500 cyclone separator. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFS-78V for microfilter AAFS-78. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFA-198V for activated carbon filter AAFA-198. Recommended replacement within 6 months at the latest, earlier if the oil content is higher.
Spare element AAFA-335V for activated carbon filter AAFA-335. Recommended replacement within 6 months at the latest, earlier if the oil content is higher.
Spare element AAFB-78V for coarse filter AAFB-78. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFM-120V for fine pre-filter AAFM-120. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFM-335V for fine pre-filter AAFM-335. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFB-198V for coarse filter AAFB-198. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFM-78V for fine pre-filter AAFM-78. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFR-78V for dust filter AAFR-78. Recommended replacement every 12 months or 4,000 operating hours.
With a G 3/8" thread and a flow of 1,000 l/min at 7 bar, the AAFS-60 microfilter traps particles larger than 0.01 µm, water and oil; residual oil is below 0.01 mg/m³. Working...
Spare element AAFP-780V for basic filter AAFP-780. Recommended replacement every 12 months or 4,000 operating hours.
With a G 3/8" thread and a flow of 1,000 l/min at 7 bar, the AAFB-60 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 3/8" thread and a flow of 1,000 l/min at 7 bar, the AAFC-60 cyclone separator removes liquid water directly after the compressor. Working pressure up to 16 bar.
With a G 1/2" thread and a flow of 1,300 l/min at 7 bar, the AAFA-78 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...