AAFB compressed air coarse filters with sintered element
The AAFB coarse filter has a sintered brass element and traps solid particles larger than 15 µm. It is a coarse pre-filter: it removes larger contaminants before they reach the finer stages, which then last longer.
The AAFB filter comes in 13 sizes with G 1/4" to 3" threads and flows of 583 to 46,000 l/min at 7 bar. It is one of the stages of the AAF filters — the housing is the same for all stages, only the element differs.
AAFB filters by size
The size number is the flow in Nm³/h at 7 bar. Each filter has a spare element, connection kits and a housing without element for your own combination.
| AAFB filters, elements and accessories by size | ||||||
|---|---|---|---|---|---|---|
| Filter | Connection | l/min at 7 bar | Nm³/h | Spare element | Connection kits | Housing without element |
| AAFB-35 | G 1/4" | 583 | 35 | AAFB-35V | L series | AAF-35T |
| AAFB-60 | G 3/8" | 1,000 | 60 | AAFB-35V | L series | AAF-60T |
| AAFB-78 | G 1/2" | 1,300 | 78 | AAFB-78V | L series | AAF-78T |
| AAFB-120 | G 3/4" | 2,000 | 120 | AAFB-120V | L series | AAF-120T |
| AAFB-198 | G 1" | 3,300 | 198 | AAFB-198V | XL series | AAF-198T |
| AAFB-335 | G 1" | 5,583 | 335 | AAFB-335V | XL series | AAF-335T |
| AAFB-510 | G 1 1/2" | 8,500 | 510 | AAFB-510V | XL series | AAF-510T |
| AAFB-780 | G 1 1/2" | 13,000 | 780 | AAFB-780V | XL series | AAF-780T |
| AAFB-1000 | G 2" | 16,667 | 1,000 | AAFB-1000V | – | AAF-1000T |
| AAFB-1500 | G 2" | 25,000 | 1,500 | AAFB-1500V | – | AAF-1500T |
| AAFB-1680 | G 2 1/2" | 28,000 | 1,680 | AAFB-1500V | – | AAF-1680T |
| AAFB-2160 | G 3" | 36,000 | 2,160 | AAFB-2160V | – | AAF-2160T |
| AAFB-2760 | G 3" | 46,000 | 2,760 | AAFB-2760V | – | AAF-2760T |
Sizes 25 and 30, 35 and 60, and 1500 and 1680 share the same element. Connection kits cover sizes up to 780. You will find the dimensions and weight on the product page of each filter.
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When to use it
A coarse filter suits the start of the filtration, where larger contaminants from the air line enter the air. On its own it achieves solid particle class 7; it does not trap oil or vapours.
Where to place it
After the cyclone separator and before the AAFP basic filter or AAFR dust filter. The B coarse filter comes in sizes from 35 upwards.
Flow by pressure
The catalogue 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, the flow changes according to the correction factor.
| AAFB filter flow in l/min by pressure | ||||||
|---|---|---|---|---|---|---|
| Size (thread) | 4 bar | 6 bar | 7 bar | 10 bar | 12 bar | 16 bar |
| 35 (G 1/4") | 367 | 513 | 583 | 805 | 950 | 1,242 |
| 60 (G 3/8") | 630 | 880 | 1,000 | 1,380 | 1,630 | 2,130 |
| 78 (G 1/2") | 819 | 1,144 | 1,300 | 1,794 | 2,119 | 2,769 |
| 120 (G 3/4") | 1,260 | 1,760 | 2,000 | 2,760 | 3,260 | 4,260 |
| 198 (G 1") | 2,079 | 2,904 | 3,300 | 4,554 | 5,379 | 7,029 |
| 335 (G 1") | 3,517 | 4,913 | 5,583 | 7,705 | 9,100 | 11,892 |
| 510 (G 1 1/2") | 5,355 | 7,480 | 8,500 | 11,730 | 13,855 | 18,105 |
| 780 (G 1 1/2") | 8,190 | 11,440 | 13,000 | 17,940 | 21,190 | 27,690 |
| 1000 (G 2") | 10,500 | 14,667 | 16,667 | 23,000 | 27,167 | 35,501 |
| 1500 (G 2") | 15,750 | 22,000 | 25,000 | 34,500 | 40,750 | 53,250 |
| 1680 (G 2 1/2") | 17,640 | 24,640 | 28,000 | 38,640 | 45,640 | 59,640 |
| 2160 (G 3") | 22,680 | 31,680 | 36,000 | 49,680 | 58,680 | 76,680 |
| 2760 (G 3") | 28,980 | 40,480 | 46,000 | 63,480 | 74,980 | 97,980 |
Element, drain and maintenance
Element: sintered brass, pressure drop of a new element 20 mbar. Working temperature +1.5 to +65 °C, pressure up to 16 bar.
The AOK16B float drain releases the condensate from the bowl on its own. You will find other drains among the condensate drains for filters.
Replace the element according to the pressure drop on the indicator, at the latest every 12 months or 4,000 operating hours. Clogging is shown by the indicator or differential pressure gauge on the filter head.
Spare elements for all stages are among the AAF elements; connection kits join the filters into a bank and fix them to the wall.
Elements and accessories for AAFB filters
Ventilek’s tip
A coarse filter spares the fine ones. When larger contaminants break loose in the air line, the B sintered element traps them, and the fine elements after it do not clog within a few weeks.
- What rating does the AAFB coarse filter have?
- 15 µm, solid particle class 7 according to ISO 8573-1.
- What is the element made of?
- Sintered brass.
- What sizes does it come in?
- In 13 sizes from 35 to 2760, with G 1/4" to 3" threads.
Product sorting
List of products
Spare element AAFB-78V for coarse filter AAFB-78. 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.
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 1" thread and a flow of 3,300 l/min at 7 bar, the AAFB-198 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
Spare element AAFB-1000V for coarse filter AAFB-1000. Recommended replacement every 12 months or 4,000 operating hours.
With a G 1/2" thread and a flow of 1,300 l/min at 7 bar, the AAFB-78 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 3/4" thread and a flow of 2,000 l/min at 7 bar, the AAFB-120 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 2 1/2" thread and a flow of 28,000 l/min at 7 bar, the AAFB-1680 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 2" thread and a flow of 25,000 l/min at 7 bar, the AAFB-1500 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 1" thread and a flow of 5,583 l/min at 7 bar, the AAFB-335 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 1/4" thread and a flow of 583 l/min at 7 bar, the AAFB-35 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 1 1/2" thread and a flow of 8,500 l/min at 7 bar, the AAFB-510 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 1 1/2" thread and a flow of 13,000 l/min at 7 bar, the AAFB-780 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 2" thread and a flow of 16,667 l/min at 7 bar, the AAFB-1000 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 3" thread and a flow of 36,000 l/min at 7 bar, the AAFB-2160 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
With a G 3" thread and a flow of 46,000 l/min at 7 bar, the AAFB-2760 coarse filter traps coarse solid contaminants larger than 15 µm and protects the finer stages after it....
Spare element AAFB-120V for coarse filter AAFB-120. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFB-1500V for coarse filters AAFB-1500 and AAFB-1680. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFB-2160V for coarse filter AAFB-2160. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFB-2760V for coarse filter AAFB-2760. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFB-335V for coarse filter AAFB-335. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFB-35V for coarse filters AAFB-35 and AAFB-60. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFB-510V for coarse filter AAFB-510. Recommended replacement every 12 months or 4,000 operating hours.
Spare element AAFB-780V for coarse filter AAFB-780. Recommended replacement every 12 months or 4,000 operating hours.