WFIT welded stainless steel filters with a thread up to 14 bar
WFIT filters from the manufacturer Omega Air have a welded housing made of stainless steel 1.4404 with threaded connections and FKM seals. They work up to 14 bar, and the manufacturer designs them for compressed air and other gases.
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 12 sizes with G 1/4" to G 3" threads, 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.
Stages at a glance
The ISO 8573-1 class is written as solid particles – water – oil.
| WFIT 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.
| WFIT filters by size and stage | ||||
|---|---|---|---|---|
| Size (connection) | N25 | N5 | I1 | M |
| 005 (G 1/4") | WFITN25-005 | WFITN5-005 | WFITI1-005 | WFITM-005 |
| 007 (G 3/8") | WFITN25-007 | WFITN5-007 | WFITI1-007 | WFITM-007 |
| 010 (G 1/2") | WFITN25-010 | WFITN5-010 | WFITI1-010 | WFITM-010 |
| 018 (G 3/4") | WFITN25-018 | WFITN5-018 | WFITI1-018 | WFITM-018 |
| 030 (G 1") | WFITN25-030 | WFITN5-030 | WFITI1-030 | WFITM-030 |
| 047 (G 1 1/4") | WFITN25-047 | WFITN5-047 | WFITI1-047 | WFITM-047 |
| 070 (G 1 1/2") | WFITN25-070 | WFITN5-070 | WFITI1-070 | WFITM-070 |
| 094 (G 2") | WFITN25-094 | WFITN5-094 | WFITI1-094 | WFITM-094 |
| 150 (G 2") | WFITN25-150 | WFITN5-150 | WFITI1-150 | WFITM-150 |
| 175 (G 2 1/2") | WFITN25-175 | WFITN5-175 | WFITI1-175 | WFITM-175 |
| 200 (G 3") | WFITN25-200 | WFITN5-200 | WFITI1-200 | WFITM-200 |
| 240 (G 3") | WFITN25-240 | WFITN5-240 | WFITI1-240 | WFITM-240 |
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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. Each size has one PF range element with the same size number.
Height A is 204 to 1,029 mm, the weight 1.9 to 16 kg.
| WFIT filter sizes | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Connection | Pressure | Nm³/h at 7 bar | l/min at 7 bar | A | B | C | Weight | Elements |
| 005 | G 1/4" | 14 bar | 75 | 1,250 | 204 mm | 120 mm | 76.1 mm | 1.9 kg | 1 |
| 007 | G 3/8" | 14 bar | 105 | 1,750 | 235 mm | 120 mm | 76.1 mm | 2.1 kg | 1 |
| 010 | G 1/2" | 14 bar | 150 | 2,500 | 239 mm | 121 mm | 76.1 mm | 2.2 kg | 1 |
| 018 | G 3/4" | 14 bar | 225 | 3,750 | 263 mm | 121 mm | 76.1 mm | 2.3 kg | 1 |
| 030 | G 1" | 14 bar | 315 | 5,250 | 278 mm | 136 mm | 88.9 mm | 3.1 kg | 1 |
| 047 | G 1 1/4" | 14 bar | 420 | 7,000 | 348 mm | 155 mm | 88.9 mm | 3.4 kg | 1 |
| 070 | G 1 1/2" | 14 bar | 600 | 10,000 | 376 mm | 180 mm | 114.3 mm | 4.6 kg | 1 |
| 094 | G 2" | 14 bar | 900 | 15,000 | 458 mm | 180 mm | 114.3 mm | 5.4 kg | 1 |
| 150 | G 2" | 14 bar | 1,260 | 21,000 | 571 mm | 180 mm | 114.3 mm | 6.1 kg | 1 |
| 175 | G 2 1/2" | 14 bar | 1,680 | 28,000 | 722 mm | 226 mm | 139.7 mm | 11.4 kg | 1 |
| 200 | G 3" | 14 bar | 2,400 | 40,000 | 1,004 mm | 224 mm | 139.7 mm | 12 kg | 1 |
| 240 | G 3" | 14 bar | 3,600 | 60,000 | 1,029 mm | 252 mm | 168.3 mm | 16 kg | 1 |
A height, B width across the connections, 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.
| WFIT filter flow in l/min by pressure | ||||
|---|---|---|---|---|
| Size (connection) | 4 bar | 7 bar | 10 bar | 14 bar |
| 005 (G 1/4") | 788 | 1,250 | 1,725 | 2,350 |
| 007 (G 3/8") | 1,103 | 1,750 | 2,415 | 3,290 |
| 010 (G 1/2") | 1,575 | 2,500 | 3,450 | 4,700 |
| 018 (G 3/4") | 2,363 | 3,750 | 5,175 | 7,050 |
| 030 (G 1") | 3,308 | 5,250 | 7,245 | 9,870 |
| 047 (G 1 1/4") | 4,410 | 7,000 | 9,660 | 13,160 |
| 070 (G 1 1/2") | 6,300 | 10,000 | 13,800 | 18,800 |
| 094 (G 2") | 9,450 | 15,000 | 20,700 | 28,200 |
| 150 (G 2") | 13,230 | 21,000 | 28,980 | 39,480 |
| 175 (G 2 1/2") | 17,640 | 28,000 | 38,640 | 52,640 |
| 200 (G 3") | 25,200 | 40,000 | 55,200 | 75,200 |
| 240 (G 3") | 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). 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 WFIT 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) and WFIF filters (14 bar, DN100 10 bar).
Ventilek’s tip
A gauge shows the pressure drop. The MDHI 50-K differential pressure gauge on the filter head shows how clogged the element is. Replacement at least once every 12 months still applies.
- What pressure are WFIT filters rated for?
- Up to 14 bar. The housing withstands −20 to +150 °C; the elements have their own temperature limit.
- How does it differ from the PF range?
- WFIT has a welded housing and FKM seals, PF a polished housing and EPDM seals. Pressure, threads and elements are the same.
- 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 G 1/4" connection and a flow of 1,250 l/min at 7 bar, the WFITN5-005 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 3/8" connection and a flow of 1,750 l/min at 7 bar, the WFITN5-007 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 1/2" connection and a flow of 2,500 l/min at 7 bar, the WFITN5-010 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 3/4" connection and a flow of 3,750 l/min at 7 bar, the WFITN5-018 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 1" connection and a flow of 5,250 l/min at 7 bar, the WFITN5-030 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded stainless...
With a G 1 1/4" connection and a flow of 7,000 l/min at 7 bar, the WFITN5-047 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 1 1/2" connection and a flow of 10,000 l/min at 7 bar, the WFITN5-070 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 2" connection and a flow of 15,000 l/min at 7 bar, the WFITN5-094 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 2" connection and a flow of 21,000 l/min at 7 bar, the WFITN5-150 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 2 1/2" connection and a flow of 28,000 l/min at 7 bar, the WFITN5-175 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 3" connection and a flow of 40,000 l/min at 7 bar, the WFITN5-200 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 3" connection and a flow of 60,000 l/min at 7 bar, the WFITN5-240 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 14 bar, welded...
With a G 1/4" connection and a flow of 1,250 l/min at 7 bar, the WFITN25-005 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a G 3/8" connection and a flow of 1,750 l/min at 7 bar, the WFITN25-007 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a G 1/2" connection and a flow of 2,500 l/min at 7 bar, the WFITN25-010 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a G 3/4" connection and a flow of 3,750 l/min at 7 bar, the WFITN25-018 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a G 1" connection and a flow of 5,250 l/min at 7 bar, the WFITN25-030 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a G 1 1/4" connection and a flow of 7,000 l/min at 7 bar, the WFITN25-047 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages...
With a G 1 1/2" connection and a flow of 10,000 l/min at 7 bar, the WFITN25-070 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages...
With a G 2" connection and a flow of 15,000 l/min at 7 bar, the WFITN25-094 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a G 2" connection and a flow of 21,000 l/min at 7 bar, the WFITN25-150 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a G 2 1/2" connection and a flow of 28,000 l/min at 7 bar, the WFITN25-175 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages...
With a G 3" connection and a flow of 40,000 l/min at 7 bar, the WFITN25-200 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a G 3" connection and a flow of 60,000 l/min at 7 bar, the WFITN25-240 coarse filter traps coarse solid contaminants larger than 25 µm and protects the finer stages after...
With a G 1/4" connection and a flow of 1,250 l/min at 7 bar, the WFITM-005 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a G 3/8" connection and a flow of 1,750 l/min at 7 bar, the WFITM-007 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a G 1/2" connection and a flow of 2,500 l/min at 7 bar, the WFITM-010 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a G 3/4" connection and a flow of 3,750 l/min at 7 bar, the WFITM-018 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a G 1" connection and a flow of 5,250 l/min at 7 bar, the WFITM-030 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a G 1 1/4" connection and a flow of 7,000 l/min at 7 bar, the WFITM-047 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil...
With a G 1 1/2" connection and a flow of 10,000 l/min at 7 bar, the WFITM-070 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil...
With a G 2" connection and a flow of 15,000 l/min at 7 bar, the WFITM-094 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a G 2" connection and a flow of 21,000 l/min at 7 bar, the WFITM-150 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a G 2 1/2" connection and a flow of 28,000 l/min at 7 bar, the WFITM-175 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil...
With a G 3" connection and a flow of 40,000 l/min at 7 bar, the WFITM-200 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a G 3" connection and a flow of 60,000 l/min at 7 bar, the WFITM-240 fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol; residual oil is...
With a G 1/4" connection and a flow of 1,250 l/min at 7 bar, the WFITI1-005 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...
With a G 3/8" connection and a flow of 1,750 l/min at 7 bar, the WFITI1-007 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...
With a G 1/2" connection and a flow of 2,500 l/min at 7 bar, the WFITI1-010 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...
With a G 3/4" connection and a flow of 3,750 l/min at 7 bar, the WFITI1-018 sintered pre-filter traps solid particles larger than 1 µm. Working pressure up to 14 bar, welded...