Omega Air BF flanged compressed air filters up to 16 bar
BF filters from the Slovenian manufacturer Omega Air remove solid contaminants, water, oil, oil vapours and odours from large flows of compressed air up to 16 bar. The housing is welded from carbon steel and is connected to the air line by flanges.
The range has 10 sizes with DN80 to DN300 flanges and flows of 28,000 to 523,333 l/min at 7 bar. The housing holds 1 to 20 identical elements — the element determines the filtration stage. 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, dry and wetted with condensate.
| BF filtration stages | ||||||
|---|---|---|---|---|---|---|
| Stage | Filtration rating | ISO 8573-1 class | Residual oil | Pressure drop of a new element (dry / wet) | Element replacement | Temperature up to |
| BFB coarse filter 15 µm | 15 µm | 7-x-x | – | 20 mbar | once a year or at 350 mbar | +65 °C |
| BFP basic filter 3 µm | 3 µm | 6-x-x | – | 10 / 20 mbar | once a year or at 350 mbar | +65 °C |
| BFR dust filter 1 µm | 1 µm | 3-x-x | – | 20 / 40 mbar | once a year or at 350 mbar | +65 °C |
| BFM fine pre-filter 0.1 µm | 0.1 µm | 2-x-2 | < 0.1 mg/m³ | 50 / 120 mbar | once a year or at 350 mbar | +65 °C |
| BFS microfilter 0.01 µm | 0.01 µm | 1-x-1 | < 0.01 mg/m³ | 80 / 190 mbar | once a year or at 350 mbar | +65 °C |
| BFA activated carbon | – | 1-x-1 | < 0.005 mg/m³ | 60 mbar | within 6 months at the latest | +45 °C |
Solid particle class 1 for activated carbon A only applies when an S microfilter is installed before it. Elements B to S are replaced at least once a year or at a pressure drop of 350 mbar, activated carbon elements within 6 months at the latest.
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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 BFS 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: coarse filter B, basic P, dust R, fine pre-filter M, microfilter S and finally activated carbon A. Each stage protects the finer stages after it, so their elements last longer.
The fine pre-filter M goes before the microfilter S. An S microfilter always goes before activated carbon — 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 R dust filter is also suitable after an adsorption dryer or an activated carbon tower, where it traps dust from the adsorbent.
Filter sizes
The size determines how many elements fit into the housing: size 0240 has one element, 3000 has twenty. All stages of the same size have the same housing, flange and flow.
The housing is 1,170 to 2,130 mm tall and weighs 61 to 684 kg. You will find the dimensions and weight of each size on the product page of the filter.
| BF filter sizes | ||||
|---|---|---|---|---|
| Size | Flange | Nm³/h at 7 bar | l/min at 7 bar | Number of elements |
| 0240 | DN80 | 1,680 | 28,000 | 1 |
| 0300 | DN100 | 3,150 | 52,500 | 2 |
| 0450 | DN125 | 4,700 | 78,333 | 3 |
| 0600 | DN150 | 6,300 | 105,000 | 4 |
| 0900 | DN150 | 9,400 | 156,667 | 6 |
| 1200 | DN200 | 12,550 | 209,167 | 8 |
| 1500 | DN200 | 15,700 | 261,667 | 10 |
| 1800 | DN250 | 18,850 | 314,167 | 12 |
| 2500 | DN250 | 25,100 | 418,333 | 16 |
| 3000 | DN300 | 31,400 | 523,333 | 20 |
The elements have a diameter of 90 mm and a height of 760 mm and are the same for all sizes. 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 and a temperature of +20 °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 BFP-0240 has a flow of 28,000 l/min at 7 bar, 28,000 × 1.38 = 38,640 l/min at 10 bar and only 21,000 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 |
Housing and elements
The housing is welded from carbon steel and is connected by DN80 to DN300 flanges. The elements stand upright inside it, and the air flows through them from the inside out. All sizes use the same element with a diameter of 90 mm and a height of 760 mm; only the number of elements differs.
The sintered element of the B coarse filter can be cleaned in an ultrasonic bath or by back-flushing. The other elements are replaced with new ones.
Condensate drains and clogging indication
MDA 60 differential pressure gauge
Shows the pressure drop of the elements, i.e. when to replace them.
BF filters are supplied without a condensate drain; it is ordered separately. For them, the manufacturer lists a manual valve, the AOK 13PA (up to 13 bar) and AOK 20B float drains, the TD 16M timed drain and electronic drains. You will find more among the condensate drains for filters.
When to replace the elements is shown by the MDA 60 differential pressure gauge: elements B to S are replaced at a pressure drop of 350 mbar. Elements, drains and the gauge are all together in the accessories for BF filters.
Other filters
For smaller flows with G 1/4" to 3" threaded connections, there are Omega Air AAF filters up to 46,000 l/min. You will find the whole range among the industrial compressed air filters.
Ventilek’s tip
A microfilter needs a fine pre-filter. Install the BFM fine pre-filter before the BFS microfilter: it traps particles and oil down to 0.1 µm, and the microfilter elements after it then only deal with the finest particles.
- 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 the fine pre-filter M (2-x-2) and the microfilter S (1-x-1). Oil vapours and odours are removed by activated carbon A.
- How do I choose the size?
- By the flow at your pressure. The flows in the table apply to 7 bar; at a different pressure, multiply them by the correction factor.
- How many elements are in the filter?
- Size 0240 has one element, 0300 two, 0450 three, 0600 four and the largest, 3000, twenty. The element is the same for all sizes.
- How often should the elements be replaced?
- Elements B to S at least once a year or at a pressure drop of 350 mbar, activated carbon elements within 6 months at the latest.
- Is a condensate drain included with the filter?
- No. The filter is supplied with elements; the condensate drain is ordered separately.
- What pressure and temperature can the filters withstand?
- Working pressure up to 16 bar. Temperature +1.5 to +65 °C, for activated carbon A up to +45 °C.
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BFB coarse filters
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BFP basic filters
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BFR dust filters
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BFM fine pre-filters
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BFS microfilters
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BFA activated carbon
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BF accessories
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Float-operated condensate drain valve for compressed air systems up to 13 bar. Version AOK13PA for external mounting on the filter body with 1/2" thread.
Designed for precise display of the pressure differential value of the filter element. Dial with colored fields - red for indicating both clogging and rupture of the element....
Spare element BFS-0240V for BFS microfilters of all sizes, diameter 90 mm, height 760 mm. Recommended replacement at least once a year or at a pressure drop of 350 mbar.
Spare element BFM-0240V for BFM fine pre-filters of all sizes, diameter 90 mm, height 760 mm. Recommended replacement at least once a year or at a pressure drop of 350 mbar.
With a DN80 flange and a flow of 28,000 l/min at 7 bar, the BFA-0240 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
With a DN100 flange and a flow of 52,500 l/min at 7 bar, the BFA-0300 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
With a DN125 flange and a flow of 78,333 l/min at 7 bar, the BFA-0450 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
With a DN150 flange and a flow of 105,000 l/min at 7 bar, the BFA-0600 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
With a DN150 flange and a flow of 156,667 l/min at 7 bar, the BFA-0900 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
With a DN200 flange and a flow of 209,167 l/min at 7 bar, the BFA-1200 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
With a DN200 flange and a flow of 261,667 l/min at 7 bar, the BFA-1500 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
With a DN250 flange and a flow of 314,167 l/min at 7 bar, the BFA-1800 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
With a DN250 flange and a flow of 418,333 l/min at 7 bar, the BFA-2500 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
With a DN300 flange and a flow of 523,333 l/min at 7 bar, the BFA-3000 activated carbon filter removes residual oil, oil vapours, hydrocarbons and odours; residual oil is below...
Float-operated condensate drain valve for compressed air systems up to 20 bar. Version AOK20B for external mounting on the filter body with 1/2" thread.
With a DN80 flange and a flow of 28,000 l/min at 7 bar, the BFP-0240 basic filter traps coarse solid contaminants larger than 3 µm and liquid water. Working pressure up to 16...
With a DN100 flange and a flow of 52,500 l/min at 7 bar, the BFP-0300 basic filter traps coarse solid contaminants larger than 3 µm and liquid water. Working pressure up to 16...
With a DN125 flange and a flow of 78,333 l/min at 7 bar, the BFP-0450 basic filter traps coarse solid contaminants larger than 3 µm and liquid water. Working pressure up to 16...
With a DN150 flange and a flow of 105,000 l/min at 7 bar, the BFP-0600 basic filter traps coarse solid contaminants larger than 3 µm and liquid water. Working pressure up to 16...
With a DN150 flange and a flow of 156,667 l/min at 7 bar, the BFP-0900 basic filter traps coarse solid contaminants larger than 3 µm and liquid water. Working pressure up to 16...
With a DN200 flange and a flow of 209,167 l/min at 7 bar, the BFP-1200 basic filter traps coarse solid contaminants larger than 3 µm and liquid water. Working pressure up to 16...
With a DN200 flange and a flow of 261,667 l/min at 7 bar, the BFP-1500 basic filter traps coarse solid contaminants larger than 3 µm and liquid water. Working pressure up to 16...
With a DN250 flange and a flow of 314,167 l/min at 7 bar, the BFP-1800 basic filter traps coarse solid contaminants larger than 3 µm and liquid water. Working pressure up to 16...
With a DN250 flange and a flow of 418,333 l/min at 7 bar, the BFP-2500 basic filter traps coarse solid contaminants larger than 3 µm and liquid water. Working pressure up to 16...
With a DN300 flange and a flow of 523,333 l/min at 7 bar, the BFP-3000 basic filter traps coarse solid contaminants larger than 3 µm and liquid water. Working pressure up to 16...
With a DN80 flange and a flow of 28,000 l/min at 7 bar, the BFB-0240 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a DN100 flange and a flow of 52,500 l/min at 7 bar, the BFB-0300 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a DN125 flange and a flow of 78,333 l/min at 7 bar, the BFB-0450 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a DN150 flange and a flow of 105,000 l/min at 7 bar, the BFB-0600 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a DN150 flange and a flow of 156,667 l/min at 7 bar, the BFB-0900 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a DN200 flange and a flow of 209,167 l/min at 7 bar, the BFB-1200 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a DN200 flange and a flow of 261,667 l/min at 7 bar, the BFB-1500 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a DN250 flange and a flow of 314,167 l/min at 7 bar, the BFB-1800 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a DN250 flange and a flow of 418,333 l/min at 7 bar, the BFB-2500 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a DN300 flange and a flow of 523,333 l/min at 7 bar, the BFB-3000 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a DN80 flange and a flow of 28,000 l/min at 7 bar, the BFR-0240 dust filter traps solid particles larger than 1 µm and liquid water. Working pressure up to 16 bar, 1...
With a DN100 flange and a flow of 52,500 l/min at 7 bar, the BFR-0300 dust filter traps solid particles larger than 1 µm and liquid water. Working pressure up to 16 bar, 2...
With a DN125 flange and a flow of 78,333 l/min at 7 bar, the BFR-0450 dust filter traps solid particles larger than 1 µm and liquid water. Working pressure up to 16 bar, 3...
With a DN150 flange and a flow of 105,000 l/min at 7 bar, the BFR-0600 dust filter traps solid particles larger than 1 µm and liquid water. Working pressure up to 16 bar, 4...
With a DN150 flange and a flow of 156,667 l/min at 7 bar, the BFR-0900 dust filter traps solid particles larger than 1 µm and liquid water. Working pressure up to 16 bar, 6...