WFIFIW20 welded stainless steel pre-filters up to 14 bar
The WFIFIW20 welded pre-filter has an element made of sintered stainless steel 1.4404 in a welded design and traps solid particles larger than 20 µm. It withstands up to +150 °C.
The WFIFIW20 filter comes in 16 sizes (DN15 to DN200) with flows of 2,500 to 352,000 l/min at 7 bar; working pressure up to 14 bar, sizes from DN100 up to 10 bar. It is one of the stages of the WFIF filters — the housing is the same for all stages, only the element differs.
WFIFIW20 filters by size
The size determines the connection and the flow. Each size has its own PF range spare element.
| WFIFIW20 filters and spare elements by size | ||||||
|---|---|---|---|---|---|---|
| Filter | Connection | l/min at 7 bar | Nm³/h at 7 bar | Height A × diameter C | Weight | Spare element |
| WFIFIW20-010 | DN15 flange | 2,500 | 150 | 230 × 76.1 mm | 3.5 kg | PFIW20-010V |
| WFIFIW20-018 | DN20 flange | 3,750 | 225 | 263 × 76.1 mm | 4.3 kg | PFIW20-018V |
| WFIFIW20-030 | DN25 flange | 5,250 | 315 | 279 × 88.9 mm | 5.7 kg | PFIW20-030V |
| WFIFIW20-047 | DN32 flange | 7,000 | 420 | 348 × 88.9 mm | 6.6 kg | PFIW20-047V |
| WFIFIW20-070 | DN40 flange | 10,000 | 600 | 391 × 114.3 mm | 8 kg | PFIW20-070V |
| WFIFIW20-094 | DN50 flange | 15,000 | 900 | 444 × 114.3 mm | 9.8 kg | PFIW20-094V |
| WFIFIW20-150 | DN50 flange | 21,000 | 1,260 | 571 × 114.3 mm | 11 kg | PFIW20-150V |
| WFIFIW20-175 | DN65 flange | 28,000 | 1,680 | 752 × 139.7 mm | 14.2 kg | PFIW20-175V |
| WFIFIW20-200 | DN80 flange | 40,000 | 2,400 | 978 × 139.7 mm | 21.2 kg | PFIW20-200V |
| WFIFIW20-240 | DN80 flange | 60,000 | 3,600 | 1,041 × 168.3 mm | 22.9 kg | PFIW20-240V |
| WFIFIW20-450 | DN100 flange | 84,000 | 5,040 | 981 × 219.1 mm | 55 kg | 3× PFIW20-175V |
| WFIFIW20-600 | DN100 flange | 112,000 | 6,720 | 1,288 × 219.1 mm | 64 kg | 3× PFIW20-200V |
| WFIFIW20-900 | DN150 flange | 160,000 | 9,600 | 1,310 × 273 mm | 87 kg | 4× PFIW20-200V |
| WFIFIW20-1200 | DN150 flange | 224,000 | 13,440 | 1,351 × 323.9 mm | 110 kg | 6× PFIW20-200V |
| WFIFIW20-1800 | DN200 flange | 288,000 | 17,280 | 1,496 × 406.4 mm | 200 kg | 8× PFIW20-200V |
| WFIFIW20-2000 | DN200 flange | 352,000 | 21,120 | 1,496 × 406.4 mm | 200 kg | 10× PFIW20-200V |
The flows apply to a pressure of 7 bar and a temperature of +20 °C. Dimensions according to the manufacturer’s technical data sheet; you will find further data on the product page of each filter.
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When to use it
The welded pre-filter IW20 is the second design of the 20 µm stage alongside the sintered pre-filter I20 and goes in the same place in the filtration. It does not trap oil; the manufacturer does not state an ISO 8573-1 class for it.
The element is made entirely of stainless steel and, like the housing, withstands up to +150 °C.
Where to place it
At the start of the filtration or after the WFIFN25 coarse filter, before the WFIFN5 basic filter or the WFIFM fine pre-filter — instead of the WFIFI20 sintered pre-filter.
Flow by pressure
The catalogue 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.
| WFIFIW20 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 | – |
| 600 (DN100 flange) | 70,560 | 112,000 | 154,560 | – |
| 900 (DN150 flange) | 100,800 | 160,000 | 220,800 | – |
| 1200 (DN150 flange) | 141,120 | 224,000 | 309,120 | – |
| 1800 (DN200 flange) | 181,440 | 288,000 | 397,440 | – |
| 2000 (DN200 flange) | 221,760 | 352,000 | 485,760 | – |
Element, condensate drainage and maintenance
A PF range element is fitted in the housing — for example, the PFIW20-010V for the WFIFIW20-010. The same element also fits the PFIW20-010, HPFIW20-010, WFITIW20-010, WFIWIW20-010 and WHFITIW20-010. Flanged filters from DN100 have several elements — their number is given in the table for each size. Element working temperature +1.5 to +150 °C.
The filter is supplied with an element, without a condensate drain. 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 sizes from DN100.
Replace the element at least once every 12 months. Once a year, also check the housing for visible damage.
Accessories for WFIFIW20 filters
MDHI 50-K gauge
Differential pressure gauge with connecting tubes; it shows how clogged the element is.
The same stage in other ranges
Stage IW20 also comes in the PFIW20 filters up to 14 bar, HPFIW20 filters up to 50 bar, WFITIW20 filters up to 14 bar, WFIWIW20 filters up to 14 bar and WHFITIW20 filters up to 50 bar. The elements are the same for all ranges.
Ventilek’s tip
Two designs of the 20 µm stage. The sintered pre-filter I20 and the welded IW20 have the same filtration rating and temperature up to +150 °C and go in the same place in the filtration.
- What filtration rating does the WFIFIW20 pre-filter have?
- The element traps particles larger than 20 µm. The manufacturer does not state an ISO 8573-1 class for it.
- How does it differ from the WFIFI20?
- Both elements are made of sintered stainless steel 1.4404 with a filtration rating of 20 µm; the IW20 element is of a welded design.
- When should the element be replaced?
- At least once every 12 months.
Bestsellers
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List of products
With a DN15 connection and a flow of 2,500 l/min at 7 bar, the WFIFIW20-010 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a DN20 connection and a flow of 3,750 l/min at 7 bar, the WFIFIW20-018 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a DN25 connection and a flow of 5,250 l/min at 7 bar, the WFIFIW20-030 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a DN32 connection and a flow of 7,000 l/min at 7 bar, the WFIFIW20-047 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a DN40 connection and a flow of 10,000 l/min at 7 bar, the WFIFIW20-070 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a DN50 connection and a flow of 15,000 l/min at 7 bar, the WFIFIW20-094 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a DN150 connection and a flow of 224,000 l/min at 7 bar, the WFIFIW20-1200 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a DN50 connection and a flow of 21,000 l/min at 7 bar, the WFIFIW20-150 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a DN65 connection and a flow of 28,000 l/min at 7 bar, the WFIFIW20-175 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a DN200 connection and a flow of 288,000 l/min at 7 bar, the WFIFIW20-1800 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a DN80 connection and a flow of 40,000 l/min at 7 bar, the WFIFIW20-200 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a DN200 connection and a flow of 352,000 l/min at 7 bar, the WFIFIW20-2000 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a DN80 connection and a flow of 60,000 l/min at 7 bar, the WFIFIW20-240 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a DN100 connection and a flow of 84,000 l/min at 7 bar, the WFIFIW20-450 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a DN100 connection and a flow of 112,000 l/min at 7 bar, the WFIFIW20-600 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a DN150 connection and a flow of 160,000 l/min at 7 bar, the WFIFIW20-900 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...