AAFHT compressed air filters for high temperatures

Up to +120 °C Omega Air AAF HT filter in the dark grey version and three types of filter elements: sintered, mesh and fibre

Omega Air AAFHT filters are designed for high-temperature compressed air. They remove solid contaminants, water and oil aerosols from it. They work up to 13 bar at temperatures up to +85 °C, or up to 10 bar at temperatures up to +120 °C.

The range has 7 stages, from the cyclone separator to the 0.01 µm microfilter, in 17 sizes from 1/8" (167 l/min) to 3" (46,000 l/min) at 7 bar. The aluminium housing is the same for all filtration stages, and the element determines the stage.

+120 °Cworking temperature at pressures up to 10 bar

13 barworking pressure at temperatures up to +85 °C

7stages from the separator to 0.01 µm

17sizes 1/8"–3"

Seven filtration stages

Each tile leads to a stage with a table of sizes, dimensions and spare elements.

AAFHTC cyclone separator in a dark grey housing

AAFHTC cyclone separators

The first stage of the range. Instead of a filter element, it has a cyclone element.

AAFHTB coarse filters

A 15 µm sintered element for coarse solid contaminants.

AAFHTN25 mesh pre-filters

A 25 µm mesh for coarse solid contaminants, the coarsest stage of the range.

AAFHTN5 mesh pre-filters

A 5 µm mesh for solid contaminants.

AAFHTR dust filters

A 1 µm pre-filter for fine dust that protects the finer stages.

AAFHTM fine pre-filters

A 0.1 µm fine pre-filter for particles, water and oil; it goes before the microfilter.

AAFHTS microfilters

A 0.01 µm microfilter for the finest particles, water and oil.

Three types of AAFHT elements: sintered, mesh and fibre

AAFHT spare elements

Elements for all stages and cyclone elements for the separators, in all sizes.

Stage	Filtration rating	What it traps
AAFHTC cyclone separator	separator, no element	first stage: instead of a filter element, it has a cyclone element
AAFHTB coarse filter	15 µm	coarse solid contaminants above 15 µm (sintered element)
AAFHTN25 mesh pre-filter	25 µm	coarse solid contaminants above 25 µm (mesh)
AAFHTN5 mesh pre-filter	5 µm	solid contaminants above 5 µm (mesh)
AAFHTR dust filter	1 µm	fine dust and solid particles above 1 µm
AAFHTM fine pre-filter	0.1 µm	fine particles above 0.1 µm, water and oil droplets
AAFHTS microfilter	0.01 µm	the finest particles above 0.01 µm, water and oil droplets

Sizes and codes

The codes lead to the filter product pages. The number in the code is the flow in Nm³/h at 7 bar. A dash means that the stage does not come in this size.

Size	Connection	Flow at 7 bar	C	B	N25	N5	R	M	S
10	1/8"	167 l/min	–	–	AAFHTN25-10	AAFHTN5-10	AAFHTR-10	AAFHTM-10	AAFHTS-10
18	1/4"	300 l/min	–	–	AAFHTN25-18	AAFHTN5-18	AAFHTR-18	AAFHTM-18	AAFHTS-18
25	1/4"	417 l/min	–	–	AAFHTN25-25	AAFHTN5-25	AAFHTR-25	AAFHTM-25	AAFHTS-25
30	3/8"	500 l/min	–	–	AAFHTN25-30	AAFHTN5-30	AAFHTR-30	AAFHTM-30	AAFHTS-30
35	1/4"	583 l/min	–	AAFHTB-35	AAFHTN25-35	AAFHTN5-35	AAFHTR-35	AAFHTM-35	AAFHTS-35
60	3/8"	1,000 l/min	–	AAFHTB-60	AAFHTN25-60	AAFHTN5-60	AAFHTR-60	AAFHTM-60	AAFHTS-60
78	1/2"	1,300 l/min	AAFHTC-78	AAFHTB-78	AAFHTN25-78	AAFHTN5-78	AAFHTR-78	AAFHTM-78	AAFHTS-78
120	3/4"	2,000 l/min	AAFHTC-120	AAFHTB-120	AAFHTN25-120	AAFHTN5-120	AAFHTR-120	AAFHTM-120	AAFHTS-120
198	1"	3,300 l/min	AAFHTC-198	AAFHTB-198	AAFHTN25-198	AAFHTN5-198	AAFHTR-198	AAFHTM-198	AAFHTS-198
335	1"	5,583 l/min	–	AAFHTB-335	AAFHTN25-335	AAFHTN5-335	AAFHTR-335	AAFHTM-335	AAFHTS-335
510	1 1/2"	8,500 l/min	AAFHTC-510	AAFHTB-510	AAFHTN25-510	AAFHTN5-510	AAFHTR-510	AAFHTM-510	AAFHTS-510
780	1 1/2"	13,000 l/min	–	AAFHTB-780	AAFHTN25-780	AAFHTN5-780	AAFHTR-780	AAFHTM-780	AAFHTS-780
1,000	2"	16,667 l/min	AAFHTC-1000	AAFHTB-1000	AAFHTN25-1000	AAFHTN5-1000	AAFHTR-1000	AAFHTM-1000	AAFHTS-1000
1,500	2"	25,000 l/min	AAFHTC-1500	AAFHTB-1500	AAFHTN25-1500	AAFHTN5-1500	AAFHTR-1500	AAFHTM-1500	AAFHTS-1500
1,680	2 1/2"	28,000 l/min	–	AAFHTB-1680	AAFHTN25-1680	AAFHTN5-1680	AAFHTR-1680	AAFHTM-1680	AAFHTS-1680
2,160	3"	36,000 l/min	AAFHTC-2160	AAFHTB-2160	AAFHTN25-2160	AAFHTN5-2160	AAFHTR-2160	AAFHTM-2160	AAFHTS-2160
2,760	3"	46,000 l/min	–	AAFHTB-2760	AAFHTN25-2760	AAFHTN5-2760	AAFHTR-2760	AAFHTM-2760	AAFHTS-2760

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Where to place each stage

AAFHT stages in the direction of flow: C, N25, B, N5, R, M, S — In the direction of flow: C separator, N25 mesh 25 µm, B coarse 15 µm, N5 mesh 5 µm, R dust 1 µm, M fine pre-filter 0.1 µm, S microfilter 0.01 µm.

The stages are arranged in the direction of flow, from the coarsest to the finest: first the cyclone separator C, then the pre-filters for coarser contaminants — the N25 mesh (25 µm), the B coarse filter with a sintered element (15 µm) and the N5 mesh (5 µm) — followed by the R dust filter (1 µm), the M fine pre-filter (0.1 µm) and finally the S microfilter (0.01 µm). Each stage protects the one after it. The M fine pre-filter does not replace the S microfilter, but it extends its life.

For high temperatures

AAFHT filters are intended for air lines where the compressed air has a high temperature. At pressures up to 10 bar they work up to +120 °C, at pressures up to 13 bar up to +85 °C; the minimum working temperature is +1.5 °C. The manufacturer lists them for general industry, the automotive industry, electronics, food and beverages, chemicals, petrochemicals and plastics.

Flow at a different pressure

The flows in the tables apply to a pressure of 7 bar and a temperature of +20 °C. At a different pressure, multiply the flow by the manufacturer’s correction factor:

Pressure (bar)	2	3	4	5	6	7	8	9	10	11	12	13
Correction factor	0.38	0.5	0.63	0.75	0.88	1	1.13	1.25	1.38	1.5	1.63	1.75

Above 10 bar, the maximum working temperature is +85 °C. For other conditions, such as a different temperature, the flow has to be recalculated — contact us.

Filter housing

Parameter	Value
Material	aluminium
Surface	powder coating in RAL 7021 (dark grey)
Connection	1/8" to 3" female thread
Working pressure and temperature	up to 13 bar at +1.5 to +85 °C; up to 10 bar at +1.5 to +120 °C
Condensate outlet	G 1/2"
Scope of supply	filter housing, filter element (cyclone element for the separator) and MCD manual condensate drain

Elements and replacement

You will find elements for all stages and cyclone elements for the separators among the AAFHT spare elements. Replace the elements once every 12 months, or earlier when the pressure drop across the filter reaches 350 mbar.

Ventilek’s tip

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

Up to what temperature do AAFHT filters work?: Up to +120 °C at pressures up to 10 bar. At pressures up to 13 bar, the maximum working temperature is +85 °C. The minimum working temperature is +1.5 °C.
Which filtration stage do I need?: Coarser solid contaminants are trapped by the N25 and N5 mesh pre-filters or the B coarse filter with a sintered element, and fine dust by the R dust filter. Water and oil droplets and the finest particles are trapped by the M fine pre-filter and the S microfilter. The M fine pre-filter goes before the S microfilter.
How do I choose the size?: By flow: the size number in the code is the flow in Nm³/h at 7 bar. At a different pressure, multiply the flow by the correction factor from the table.
How often should the element be replaced?: Once every 12 months, or earlier when the pressure drop across the filter reaches 350 mbar.
What comes with the filter?: The filter housing, the filter element and an MCD manual condensate drain. The cyclone separator comes with a cyclone element instead of a filter element.

Data on dimensions, flows, weights and correction factors are based on the technical documentation of the manufacturer Omega Air. Flows apply to 7 bar and +20 °C.

You will find other Omega Air filters among the Omega Air industrial compressed air filters, and filters up to 16 bar in the AAF range.