WFIF welded stainless steel filters with flanges up to 14 bar
WFIF filters from the manufacturer Omega Air have a welded housing made of stainless steel 1.4404 with flanges according to EN 1092-1/11 PN16, or ANSI B16.5 on request, and FKM seals. They work up to 14 bar; size DN100 up to 10 bar.
Four stages: 25 and 5 µm stainless steel meshes, a 1 µm sintered pre-filter and a 0.1 µm fine pre-filter. The range has 11 sizes with DN15 to DN100 flanges, with flows of 2,500 to 84,000 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.
Stages at a glance
The ISO 8573-1 class is written as solid particles – water – oil.
| WFIF filtration stages | |||||
|---|---|---|---|---|---|
| Stage | Filtration rating | ISO 8573-1 class | Residual oil | Element material | Temperature up to |
| N25 – coarse filter | 25 µm | – | – | stainless steel mesh 1.4301 | +150 °C |
| N5 – basic filter | 5 µm | – | – | stainless steel mesh 1.4301 | +150 °C |
| I1 – sintered pre-filter | 1 µm | – | – | sintered stainless steel 1.4404 | +150 °C |
| M – fine pre-filter | 0.1 µm | 2-x-2 | < 0.1 mg/m³ | borosilicate microfibres | +120 °C |
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.
| WFIF filters by size and stage | ||||
|---|---|---|---|---|
| Size (connection) | N25 | N5 | I1 | M |
| 010 (DN15 flange) | WFIFN25-010 | WFIFN5-010 | WFIFI1-010 | WFIFM-010 |
| 018 (DN20 flange) | WFIFN25-018 | WFIFN5-018 | WFIFI1-018 | WFIFM-018 |
| 030 (DN25 flange) | WFIFN25-030 | WFIFN5-030 | WFIFI1-030 | WFIFM-030 |
| 047 (DN32 flange) | WFIFN25-047 | WFIFN5-047 | WFIFI1-047 | WFIFM-047 |
| 070 (DN40 flange) | WFIFN25-070 | WFIFN5-070 | WFIFI1-070 | WFIFM-070 |
| 094 (DN50 flange) | WFIFN25-094 | WFIFN5-094 | WFIFI1-094 | WFIFM-094 |
| 150 (DN50 flange) | WFIFN25-150 | WFIFN5-150 | WFIFI1-150 | WFIFM-150 |
| 175 (DN65 flange) | WFIFN25-175 | WFIFN5-175 | WFIFI1-175 | WFIFM-175 |
| 200 (DN80 flange) | WFIFN25-200 | WFIFN5-200 | WFIFI1-200 | WFIFM-200 |
| 240 (DN80 flange) | WFIFN25-240 | WFIFN5-240 | WFIFI1-240 | WFIFM-240 |
| 450 (DN100 flange) | WFIFN25-450 | WFIFN5-450 | WFIFI1-450 | WFIFM-450 |
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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.
The meshes and the sintered pre-filter trap solid contaminants; the fine pre-filter M also traps oil aerosol down to 0.1 mg/m³.
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. Sizes 010 to 240 have one element; size 450 has three size 175 elements.
Height A is 230 to 1,041 mm, the weight 3.5 to 55 kg.
| WFIF filter sizes | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Connection | Pressure | Nm³/h at 7 bar | l/min at 7 bar | A | B | C | Weight | Elements |
| 010 | DN15 flange | 14 bar | 150 | 2,500 | 230 mm | 195 mm | 76.1 mm | 3.5 kg | 1 |
| 018 | DN20 flange | 14 bar | 225 | 3,750 | 263 mm | 201 mm | 76.1 mm | 4.3 kg | 1 |
| 030 | DN25 flange | 14 bar | 315 | 5,250 | 279 mm | 216 mm | 88.9 mm | 5.7 kg | 1 |
| 047 | DN32 flange | 14 bar | 420 | 7,000 | 348 mm | 239 mm | 88.9 mm | 6.6 kg | 1 |
| 070 | DN40 flange | 14 bar | 600 | 10,000 | 391 mm | 260 mm | 114.3 mm | 8 kg | 1 |
| 094 | DN50 flange | 14 bar | 900 | 15,000 | 444 mm | 270 mm | 114.3 mm | 9.8 kg | 1 |
| 150 | DN50 flange | 14 bar | 1,260 | 21,000 | 571 mm | 270 mm | 114.3 mm | 11 kg | 1 |
| 175 | DN65 flange | 14 bar | 1,680 | 28,000 | 752 mm | 295 mm | 139.7 mm | 14.2 kg | 1 |
| 200 | DN80 flange | 14 bar | 2,400 | 40,000 | 978 mm | 306 mm | 139.7 mm | 21.2 kg | 1 |
| 240 | DN80 flange | 14 bar | 3,600 | 60,000 | 1,041 mm | 332 mm | 168.3 mm | 22.9 kg | 1 |
| 450 | DN100 flange | 10 bar | 5,040 | 84,000 | 981 mm | 410 mm | 219.1 mm | 55 kg | 3× |
A height, B length across the flanges (EN 1092-1), C housing diameter. Dimensions and weights 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.
| WFIF filter flow in l/min by pressure | ||||
|---|---|---|---|---|
| Size (connection) | 4 bar | 7 bar | 10 bar | 14 bar |
| 010 (DN15 flange) | 1,575 | 2,500 | 3,450 | 4,700 |
| 018 (DN20 flange) | 2,363 | 3,750 | 5,175 | 7,050 |
| 030 (DN25 flange) | 3,308 | 5,250 | 7,245 | 9,870 |
| 047 (DN32 flange) | 4,410 | 7,000 | 9,660 | 13,160 |
| 070 (DN40 flange) | 6,300 | 10,000 | 13,800 | 18,800 |
| 094 (DN50 flange) | 9,450 | 15,000 | 20,700 | 28,200 |
| 150 (DN50 flange) | 13,230 | 21,000 | 28,980 | 39,480 |
| 175 (DN65 flange) | 17,640 | 28,000 | 38,640 | 52,640 |
| 200 (DN80 flange) | 25,200 | 40,000 | 55,200 | 75,200 |
| 240 (DN80 flange) | 37,800 | 60,000 | 82,800 | 112,800 |
| 450 (DN100 flange) | 52,920 | 84,000 | 115,920 | – |
Housing and connection
Housing: welded stainless steel 1.4404, 1.4301 on request, FKM seals (EPDM or silicone on request), flanges according to EN 1092-1/11 PN16, ANSI B16.5 WN Class 150 on request. 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 WFIF 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, G 1" for size DN100.
Other ranges
Other process filters: PF filters (14 bar, 10 bar from DN100), HPF filters (50 bar) and WFIT filters (14 bar).
Ventilek’s tip
Flanges to standard. As standard, the flanges comply with EN 1092-1/11 PN16. For ANSI air lines, ANSI B16.5 WN Class 150 flanges are supplied on request — this changes the length B across the flanges.
- What pressure are WFIF filters rated for?
- Up to 14 bar; size DN100 up to 10 bar. The housing withstands −20 to +150 °C; the elements have their own temperature limit.
- What flanges does the filter have?
- EN 1092-1/11 PN16 as standard, ANSI B16.5 WN Class 150 on request.
- 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.
Product sorting
List of products
With a DN15 connection and a flow of 2,500 l/min at 7 bar, the WFIFN5-010 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded stainless...
With a DN20 connection and a flow of 3,750 l/min at 7 bar, the WFIFN5-018 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded stainless...
With a DN25 connection and a flow of 5,250 l/min at 7 bar, the WFIFN5-030 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded stainless...
With a DN32 connection and a flow of 7,000 l/min at 7 bar, the WFIFN5-047 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded stainless...
With a DN40 connection and a flow of 10,000 l/min at 7 bar, the WFIFN5-070 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a DN50 connection and a flow of 15,000 l/min at 7 bar, the WFIFN5-094 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a DN50 connection and a flow of 21,000 l/min at 7 bar, the WFIFN5-150 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a DN65 connection and a flow of 28,000 l/min at 7 bar, the WFIFN5-175 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a DN80 connection and a flow of 40,000 l/min at 7 bar, the WFIFN5-200 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a DN80 connection and a flow of 60,000 l/min at 7 bar, the WFIFN5-240 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a DN100 connection and a flow of 84,000 l/min at 7 bar, the WFIFN5-450 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 10 bar, welded...
With a DN15 connection and a flow of 2,500 l/min at 7 bar, the WFIFN25-010 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN20 connection and a flow of 3,750 l/min at 7 bar, the WFIFN25-018 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN25 connection and a flow of 5,250 l/min at 7 bar, the WFIFN25-030 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN32 connection and a flow of 7,000 l/min at 7 bar, the WFIFN25-047 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN40 connection and a flow of 10,000 l/min at 7 bar, the WFIFN25-070 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN50 connection and a flow of 15,000 l/min at 7 bar, the WFIFN25-094 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN50 connection and a flow of 21,000 l/min at 7 bar, the WFIFN25-150 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN65 connection and a flow of 28,000 l/min at 7 bar, the WFIFN25-175 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN80 connection and a flow of 40,000 l/min at 7 bar, the WFIFN25-200 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN80 connection and a flow of 60,000 l/min at 7 bar, the WFIFN25-240 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN100 connection and a flow of 84,000 l/min at 7 bar, the WFIFN25-450 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a DN15 connection and a flow of 2,500 l/min at 7 bar, the WFIFM-010 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN20 connection and a flow of 3,750 l/min at 7 bar, the WFIFM-018 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN25 connection and a flow of 5,250 l/min at 7 bar, the WFIFM-030 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN32 connection and a flow of 7,000 l/min at 7 bar, the WFIFM-047 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN40 connection and a flow of 10,000 l/min at 7 bar, the WFIFM-070 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN50 connection and a flow of 15,000 l/min at 7 bar, the WFIFM-094 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN50 connection and a flow of 21,000 l/min at 7 bar, the WFIFM-150 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN65 connection and a flow of 28,000 l/min at 7 bar, the WFIFM-175 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN80 connection and a flow of 40,000 l/min at 7 bar, the WFIFM-200 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN80 connection and a flow of 60,000 l/min at 7 bar, the WFIFM-240 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN100 connection and a flow of 84,000 l/min at 7 bar, the WFIFM-450 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a DN15 connection and a flow of 2,500 l/min at 7 bar, the WFIFI1-010 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...
With a DN20 connection and a flow of 3,750 l/min at 7 bar, the WFIFI1-018 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...
With a DN25 connection and a flow of 5,250 l/min at 7 bar, the WFIFI1-030 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...
With a DN32 connection and a flow of 7,000 l/min at 7 bar, the WFIFI1-047 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...
With a DN40 connection and a flow of 10,000 l/min at 7 bar, the WFIFI1-070 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...
With a DN50 connection and a flow of 15,000 l/min at 7 bar, the WFIFI1-094 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...
With a DN50 connection and a flow of 21,000 l/min at 7 bar, the WFIFI1-150 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...