WFIW welded stainless steel filters with welding ends up to 14 bar
WFIW filters from the manufacturer Omega Air have a welded housing made of stainless steel 1.4404 with welding ends for the pipeline and FKM seals. They work up to 14 bar, and the manufacturer designs them for compressed air and other gases where there is a risk of corrosion or where the housing must be made of stainless steel.
Twelve filtration stages: a cyclone separator with a cyclone element, 25 and 5 µm stainless steel meshes, 20 and 1 µm sintered and welded pre-filters, a 3 µm fibre pre-filter, a 1 µm dust filter, a 0.1 µm fine pre-filter, a 0.01 µm microfilter and activated carbon. The range has 11 sizes with welding ends for ø 17.2 to 88.9 mm pipes, with flows of 1,250 to 60,000 l/min at 7 bar. It is one of the stainless steel process filters.
Filtration stages
Each tile leads to a stage with a table of sizes and spare elements.
WFIWC cyclone separators
The cyclone element separates water and oil droplets; the first stage of the range.
WFIWA activated carbon filters
Oil vapours, hydrocarbons and odours; class 1-x-1 with a microfilter before it.
Stages at a glance
The ISO 8573-1 class is written as solid particles – water – oil.
| WFIW filtration stages | |||||
|---|---|---|---|---|---|
| Stage | Filtration rating | ISO 8573-1 class | Residual oil | Element material | Temperature up to |
| C – cyclone separator | – | – | – | cyclone element | +120 °C |
| N25 – coarse filter | 25 µm | – | – | stainless steel mesh 1.4301 | +150 °C |
| I20 – sintered pre-filter | 20 µm | – | – | sintered stainless steel 1.4404 | +150 °C |
| IW20 – welded pre-filter | 20 µm | – | – | sintered stainless steel 1.4404 | +150 °C |
| N5 – basic filter | 5 µm | – | – | stainless steel mesh 1.4301 | +150 °C |
| P – fibre pre-filter | 3 µm | 6-x-x | – | acrylic fibres and cellulose | +65 °C |
| I1 – sintered pre-filter | 1 µm | – | – | sintered stainless steel 1.4404 | +150 °C |
| IW1 – welded pre-filter | 1 µm | – | – | sintered stainless steel 1.4404 | +150 °C |
| R – dust filter | 1 µm | 3-x-x | – | borosilicate microfibres | +120 °C |
| M – fine pre-filter | 0.1 µm | 2-x-2 | < 0.1 mg/m³ | borosilicate microfibres | +120 °C |
| S – microfilter | 0.01 µm | 1-x-1 | < 0.01 mg/m³ | borosilicate microfibres | +120 °C |
| A – activated carbon filter | – | 1-x-1 | – | borosilicate microfibres and activated carbon | +45 °C |
Solid particle class 1 for activated carbon A only applies when an S microfilter is installed before it. The manufacturer does not state a class for the stainless steel meshes and sintered elements. The temperature is the limit of the element; the housing withstands +150 °C.
All filters in the range
Each row is a size with its connection, each column a filtration stage. The code leads to the product page of the filter.
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How to put the filtration together
The stages are arranged from coarse to fine in the direction of flow. Each stage protects the finer stages after it, so their elements last longer. Only the stages needed for the required air purity are installed in the air line.
The cyclone separator C is at the start and separates condensate droplets. The welded pre-filters IW20 and IW1 are a different design of the 20 and 1 µm stages — they are used instead of the sintered I20 and I1. The fine pre-filter M goes before the microfilter S and protects its element; a microfilter S goes before activated carbon A.
Sizes and dimensions
The size determines the connection, the flow and the housing dimensions. All stages of the same size have the same housing; only the element differs. Each size has one PF range element with the same size number; the cyclone separator has a cyclone element.
Height A is 202 to 1,029 mm, the weight 1.8 to 16.2 kg.
| WFIW filter sizes | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Connection | Pressure | Nm³/h at 7 bar | l/min at 7 bar | A | B | C | Weight | Elements |
| 005 | welding end ø 17.2 mm | 14 bar | 75 | 1,250 | 202 mm | 116 mm | 76.1 mm | 1.8 kg | 1 |
| 010 | welding end ø 21.3 mm | 14 bar | 150 | 2,500 | 240 mm | 121 mm | 76.1 mm | 2 kg | 1 |
| 018 | welding end ø 26.9 mm | 14 bar | 225 | 3,750 | 254 mm | 125 mm | 76.1 mm | 2 kg | 1 |
| 030 | welding end ø 33.7 mm | 14 bar | 315 | 5,250 | 280 mm | 136 mm | 88.9 mm | 3 kg | 1 |
| 047 | welding end ø 42.4 mm | 14 bar | 420 | 7,000 | 337 mm | 155 mm | 88.9 mm | 3 kg | 1 |
| 070 | welding end ø 48.3 mm | 14 bar | 600 | 10,000 | 376 mm | 176 mm | 114.3 mm | 4.3 kg | 1 |
| 094 | welding end ø 60.3 mm | 14 bar | 900 | 15,000 | 457 mm | 180 mm | 114.3 mm | 4.8 kg | 1 |
| 150 | welding end ø 60.3 mm | 14 bar | 1,260 | 21,000 | 583 mm | 180 mm | 114.3 mm | 5.3 kg | 1 |
| 175 | welding end ø 76.1 mm | 14 bar | 1,680 | 28,000 | 740 mm | 224 mm | 139.7 mm | 9 kg | 1 |
| 200 | welding end ø 88.9 mm | 14 bar | 2,400 | 40,000 | 1,004 mm | 224 mm | 139.7 mm | 10.8 kg | 1 |
| 240 | welding end ø 88.9 mm | 14 bar | 3,600 | 60,000 | 1,029 mm | 252 mm | 168.3 mm | 16.2 kg | 1 |
A height, B head width, C housing diameter. Dimensions according to the manufacturer’s technical data sheet.
Flow at a different pressure
The flows apply to a pressure of 7 bar and a temperature of +20 °C. At a different pressure, they are multiplied by the correction factor: 1.88 at 14 bar, 0.63 at 4 bar.
| WFIW filter flow in l/min by pressure | ||||
|---|---|---|---|---|
| Size (connection) | 4 bar | 7 bar | 10 bar | 14 bar |
| 005 (welding end ø 17.2 mm) | 788 | 1,250 | 1,725 | 2,350 |
| 010 (welding end ø 21.3 mm) | 1,575 | 2,500 | 3,450 | 4,700 |
| 018 (welding end ø 26.9 mm) | 2,363 | 3,750 | 5,175 | 7,050 |
| 030 (welding end ø 33.7 mm) | 3,308 | 5,250 | 7,245 | 9,870 |
| 047 (welding end ø 42.4 mm) | 4,410 | 7,000 | 9,660 | 13,160 |
| 070 (welding end ø 48.3 mm) | 6,300 | 10,000 | 13,800 | 18,800 |
| 094 (welding end ø 60.3 mm) | 9,450 | 15,000 | 20,700 | 28,200 |
| 150 (welding end ø 60.3 mm) | 13,230 | 21,000 | 28,980 | 39,480 |
| 175 (welding end ø 76.1 mm) | 17,640 | 28,000 | 38,640 | 52,640 |
| 200 (welding end ø 88.9 mm) | 25,200 | 40,000 | 55,200 | 75,200 |
| 240 (welding end ø 88.9 mm) | 37,800 | 60,000 | 82,800 | 112,800 |
Housing and connection
Housing: welded stainless steel 1.4404, 1.4301 on request, FKM seals (EPDM or silicone on request), welding ends for the pipeline. It withstands temperatures from −20 to +150 °C; the actual limit depends on the seals and the element.
The filter is supplied with an element, without a condensate drain.
Accessories
MDHI 50-K gauge
Differential pressure gauge with connecting tubes; it shows how clogged the element is.
Condensate drainage
For WFIW filters, the manufacturer offers the AOK20SS stainless steel float drain up to 20 bar and +65 °C and, for the head, the MDHI 50-K differential pressure gauge. The drain outlet in the bottom has a G 1/2" thread.
Other ranges
Other process filters: PF filters (14 bar, 10 bar from DN100), HPF filters (50 bar), WFIT filters (14 bar), WFIF filters (14 bar, 10 bar from DN100) and WHFIT filters (50 bar).
Ventilek’s tip
Welded into the pipeline. The ends of the WFIW housing match the diameter of the stainless steel pipe into which the filter is welded. The diameter for each size is given in the size table.
- What pressure are WFIW filters rated for?
- Up to 14 bar. The housing withstands −20 to +150 °C; the elements have their own temperature limit.
- How is the filter connected?
- By welding it into the pipeline. Depending on the size, the housing ends match a pipe diameter of ø 17.2 to 88.9 mm.
- How do I choose the size?
- By the flow at your pressure. The flows apply to 7 bar; at a different pressure, multiply them by the correction factor — at 14 bar it is 1.88.
- Is a condensate drain included with the filter?
- No, it is ordered separately. The AOK20SS float drain up to 20 bar is suitable.
- How often should the elements be replaced?
- At least once every 12 months. Once a year, also check the housing for visible damage.
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WFIWC cyclone separators; with insert, no filter element
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WFIWN25 coarse filters; stainless steel mesh 25 um
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WFIWI20 sintered pre-filters; stainless, filtration to 20 um
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WFIWIW20 welded pre-filters; sintered, filtration to 20 um
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WFIWN5 basic filters; stainless steel mesh 5 um
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WFIWP fibre pre-filters; acrylic and cellulose, to 3 um
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WFIWI1 sintered pre-filters; stainless, filtration to 1 um
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WFIWIW1 welded pre-filters; sintered, filtration to 1 um
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WFIWR dust filters; filtration to 1 um
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WFIWM fine pre-filters; filtration to 0.1 um
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WFIWS microfilters; filtration to 0.01 um
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WFIWA activated carbon; oil vapours and odours
Bestsellers
Product sorting
List of products
With a ø 17.2 mm pipe connection and a flow of 1,250 l/min at 7 bar, the WFIWA-005 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 21.3 mm pipe connection and a flow of 2,500 l/min at 7 bar, the WFIWA-010 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 26.9 mm pipe connection and a flow of 3,750 l/min at 7 bar, the WFIWA-018 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 33.7 mm pipe connection and a flow of 5,250 l/min at 7 bar, the WFIWA-030 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 42.4 mm pipe connection and a flow of 7,000 l/min at 7 bar, the WFIWA-047 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 48.3 mm pipe connection and a flow of 10,000 l/min at 7 bar, the WFIWA-070 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 60.3 mm pipe connection and a flow of 15,000 l/min at 7 bar, the WFIWA-094 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 60.3 mm pipe connection and a flow of 21,000 l/min at 7 bar, the WFIWA-150 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 76.1 mm pipe connection and a flow of 28,000 l/min at 7 bar, the WFIWA-175 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 88.9 mm pipe connection and a flow of 40,000 l/min at 7 bar, the WFIWA-200 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 88.9 mm pipe connection and a flow of 60,000 l/min at 7 bar, the WFIWA-240 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to...
With a ø 17.2 mm pipe connection and a flow of 1,250 l/min at 7 bar, the WFIWN5-005 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a ø 21.3 mm pipe connection and a flow of 2,500 l/min at 7 bar, the WFIWN5-010 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a ø 26.9 mm pipe connection and a flow of 3,750 l/min at 7 bar, the WFIWN5-018 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a ø 33.7 mm pipe connection and a flow of 5,250 l/min at 7 bar, the WFIWN5-030 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a ø 42.4 mm pipe connection and a flow of 7,000 l/min at 7 bar, the WFIWN5-047 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a ø 48.3 mm pipe connection and a flow of 10,000 l/min at 7 bar, the WFIWN5-070 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar,...
With a ø 60.3 mm pipe connection and a flow of 15,000 l/min at 7 bar, the WFIWN5-094 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar,...
With a ø 60.3 mm pipe connection and a flow of 21,000 l/min at 7 bar, the WFIWN5-150 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar,...
With a ø 76.1 mm pipe connection and a flow of 28,000 l/min at 7 bar, the WFIWN5-175 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar,...
With a ø 88.9 mm pipe connection and a flow of 40,000 l/min at 7 bar, the WFIWN5-200 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar,...
With a ø 88.9 mm pipe connection and a flow of 60,000 l/min at 7 bar, the WFIWN5-240 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar,...
With a ø 17.2 mm pipe connection and a flow of 1,250 l/min at 7 bar, the WFIWN25-005 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 21.3 mm pipe connection and a flow of 2,500 l/min at 7 bar, the WFIWN25-010 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 26.9 mm pipe connection and a flow of 3,750 l/min at 7 bar, the WFIWN25-018 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 33.7 mm pipe connection and a flow of 5,250 l/min at 7 bar, the WFIWN25-030 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 42.4 mm pipe connection and a flow of 7,000 l/min at 7 bar, the WFIWN25-047 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 48.3 mm pipe connection and a flow of 10,000 l/min at 7 bar, the WFIWN25-070 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 60.3 mm pipe connection and a flow of 15,000 l/min at 7 bar, the WFIWN25-094 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 60.3 mm pipe connection and a flow of 21,000 l/min at 7 bar, the WFIWN25-150 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 76.1 mm pipe connection and a flow of 28,000 l/min at 7 bar, the WFIWN25-175 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 88.9 mm pipe connection and a flow of 40,000 l/min at 7 bar, the WFIWN25-200 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 88.9 mm pipe connection and a flow of 60,000 l/min at 7 bar, the WFIWN25-240 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer...
With a ø 17.2 mm pipe connection and a flow of 1,250 l/min at 7 bar, the WFIWC-005 cyclone separator removes condensate droplets — water and oil droplets — from the air before...
With a ø 21.3 mm pipe connection and a flow of 2,500 l/min at 7 bar, the WFIWC-010 cyclone separator removes condensate droplets — water and oil droplets — from the air before...
With a ø 26.9 mm pipe connection and a flow of 3,750 l/min at 7 bar, the WFIWC-018 cyclone separator removes condensate droplets — water and oil droplets — from the air before...
With a ø 33.7 mm pipe connection and a flow of 5,250 l/min at 7 bar, the WFIWC-030 cyclone separator removes condensate droplets — water and oil droplets — from the air before...
With a ø 42.4 mm pipe connection and a flow of 7,000 l/min at 7 bar, the WFIWC-047 cyclone separator removes condensate droplets — water and oil droplets — from the air before...
With a ø 48.3 mm pipe connection and a flow of 10,000 l/min at 7 bar, the WFIWC-070 cyclone separator removes condensate droplets — water and oil droplets — from the air before...
With a ø 60.3 mm pipe connection and a flow of 15,000 l/min at 7 bar, the WFIWC-094 cyclone separator removes condensate droplets — water and oil droplets — from the air before...