AAFO2 oxygen filters up to 16 bar

For oxygen Omega Air AAF O2 oxygen filter and the meshes of the R, M and S stage elements

Omega Air AAFO2 oxygen filters were developed by the manufacturer specifically for removing solid particles from compressed oxygen. They have an aluminium housing and a working pressure of up to 16 bar.

17 sizes with 1/8" to 3" connections, flow of 167 to 46,000 l/min at 7 bar, working temperature +1.5 to +65 °C. The three filtration stages R, M and S differ in the element; the housing is the same for all of them.

3 stagesR 1 µm, M 0.1 µm, S 0.01 µm

17sizes 1/8"–3"

16 barworking pressure

46,000 l/minhighest flow at 7 bar

Sizes and codes

The codes lead to the pages of the filters and their spare elements.

Size	Connection	Flow at 7 bar	R	M	S	Element R	Element M	Element S
10	1/8"	167 l/min	AAFO2R-10	AAFO2M-10	AAFO2S-10	AAFO2R-10V	AAFO2M-10V	AAFO2S-10V
18	1/4"	300 l/min	AAFO2R-18	AAFO2M-18	AAFO2S-18	AAFO2R-18V	AAFO2M-18V	AAFO2S-18V
25	1/4"	417 l/min	AAFO2R-25	AAFO2M-25	AAFO2S-25	AAFO2R-25V	AAFO2M-25V	AAFO2S-25V
30	3/8"	500 l/min	AAFO2R-30	AAFO2M-30	AAFO2S-30	AAFO2R-25V	AAFO2M-25V	AAFO2S-25V
35	1/4"	583 l/min	AAFO2R-35	AAFO2M-35	AAFO2S-35	AAFO2R-35V	AAFO2M-35V	AAFO2S-35V
60	3/8"	1,000 l/min	AAFO2R-60	AAFO2M-60	AAFO2S-60	AAFO2R-35V	AAFO2M-35V	AAFO2S-35V
78	1/2"	1,300 l/min	AAFO2R-78	AAFO2M-78	AAFO2S-78	AAFO2R-78V	AAFO2M-78V	AAFO2S-78V
120	3/4"	2,000 l/min	AAFO2R-120	AAFO2M-120	AAFO2S-120	AAFO2R-120V	AAFO2M-120V	AAFO2S-120V
198	1"	3,300 l/min	AAFO2R-198	AAFO2M-198	AAFO2S-198	AAFO2R-198V	AAFO2M-198V	AAFO2S-198V
335	1"	5,583 l/min	AAFO2R-335	AAFO2M-335	AAFO2S-335	AAFO2R-335V	AAFO2M-335V	AAFO2S-335V
510	1 1/2"	8,500 l/min	AAFO2R-510	AAFO2M-510	AAFO2S-510	AAFO2R-510V	AAFO2M-510V	AAFO2S-510V
780	1 1/2"	13,000 l/min	AAFO2R-780	AAFO2M-780	AAFO2S-780	AAFO2R-780V	AAFO2M-780V	AAFO2S-780V
1,000	2"	16,667 l/min	AAFO2R-1000	AAFO2M-1000	AAFO2S-1000	AAFO2R-1000V	AAFO2M-1000V	AAFO2S-1000V
1,500	2"	25,000 l/min	AAFO2R-1500	AAFO2M-1500	AAFO2S-1500	AAFO2R-1500V	AAFO2M-1500V	AAFO2S-1500V
1,680	2 1/2"	28,000 l/min	AAFO2R-1680	AAFO2M-1680	AAFO2S-1680	AAFO2R-1500V	AAFO2M-1500V	AAFO2S-1500V
2,160	3"	36,000 l/min	AAFO2R-2160	AAFO2M-2160	AAFO2S-2160	AAFO2R-2160V	AAFO2M-2160V	AAFO2S-2160V
2,760	3"	46,000 l/min	AAFO2R-2760	AAFO2M-2760	AAFO2S-2760	AAFO2R-2760V	AAFO2M-2760V	AAFO2S-2760V

Three elements each serve two filter sizes: 25 and 30, 35 and 60, 1,500 and 1,680.

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How to choose the stage

Filtration stages in the direction of flow: R, M, S — In the direction of flow: R dust filter 1 µm, M fine pre-filter 0.1 µm, S microfilter 0.01 µm.

The stages are arranged in the direction of flow, starting with the coarsest: the dust filter R traps solid particles down to 1 µm, the fine pre-filter M down to 0.1 µm and the microfilter S down to 0.01 µm. Each stage protects the one after it. The fine pre-filter M goes before the microfilter S — it does not replace the microfilter, but it extends its life.

How to choose the size

By flow. In the AAFO2 range, the number in the code is the flow in Nm³/h at 7 bar: for example, the AAFO2R-120 passes 120 Nm³/h, i.e. 2,000 l/min.

The flows apply at an ambient temperature of +20 °C, an inlet temperature of +35 °C and a pressure of 7 bar. For other conditions, the flow is converted using a correction factor — contact us.

Condensate drain

For AAFO2 filters, the manufacturer lists manual condensate drainage from the bottom of the bowl: a manual valve or ball valve. The manufacturer does not list any other drain for oxygen filters.

Spare elements

The element determines the filtration stage. The spare element for each size and stage is in the table above, in the Element R, M and S columns.

Ventilek’s tip

The fine pre-filter M goes before the microfilter S. The 0.01 µm microfilter traps the finest particles, but coarser ones would quickly clog it. Place the fine pre-filter M and the dust filter R of the same size before it.

Which filtration stage do I need?: It depends on how fine the particles are that the filter needs to trap: dust filter R down to 1 µm, fine pre-filter M down to 0.1 µm, microfilter S down to 0.01 µm. The fine pre-filter M goes before the microfilter S.
How do I choose the size?: By the flow at 7 bar in the table. The number in the AAFO2 code is the flow in Nm³/h, for example AAFO2R-120 = 120 Nm³/h.
Is AAFO2 suitable for pressures above 16 bar?: No, the working pressure of the AAFO2 range is up to 16 bar. For higher pressures up to 50 bar, there is the HFO2 range.
How is condensate drained?: Manually: for AAFO2, the manufacturer lists a manual valve or ball valve at the bottom of the bowl.

Data on sizes, flows and weights are based on the technical documentation for the Omega Air AAFO2 and HFO2 ranges. Flows apply at 7 bar, an ambient temperature of +20 °C and an inlet temperature of +35 °C.

Both ranges are compared on the Oxygen filters page. For pressures up to 50 bar, there is the HFO2 high-pressure range. For oxygen lines, we also offer pressure vessels for oxygen and GOX pressure hoses for oxygen.