PFIW20 welded stainless steel pre-filters up to 14 bar
The PFIW20 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 PFIW20 filter comes in 18 sizes (G 1/4" to DN200) with flows of 1,250 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 PF filters — the housing is the same for all stages, only the element differs.
PFIW20 filters by size
The size determines the connection and the flow. Each size has its own PF range spare element.
| PFIW20 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 |
| PFIW20-005 | G 1/4" | 1,250 | 75 | 206 × 76.1 mm | 1.8 kg | PFIW20-005V |
| PFIW20-007 | G 3/8" | 1,750 | 105 | 236 × 76.1 mm | 2 kg | PFIW20-007V |
| PFIW20-010 | G 1/2" | 2,500 | 150 | 239 × 76.1 mm | 2.1 kg | PFIW20-010V |
| PFIW20-018 | G 3/4" | 3,750 | 225 | 263 × 76.1 mm | 2.2 kg | PFIW20-018V |
| PFIW20-030 | G 1" | 5,250 | 315 | 280 × 88.9 mm | 3 kg | PFIW20-030V |
| PFIW20-047 | G 1 1/4" | 7,000 | 420 | 349 × 88.9 mm | 3.4 kg | PFIW20-047V |
| PFIW20-070 | G 1 1/2" | 10,000 | 600 | 376 × 114.3 mm | 4.6 kg | PFIW20-070V |
| PFIW20-094 | G 2" | 15,000 | 900 | 445 × 114.3 mm | 5.2 kg | PFIW20-094V |
| PFIW20-150 | G 2" | 21,000 | 1,260 | 572 × 114.3 mm | 6 kg | PFIW20-150V |
| PFIW20-175 | G 2 1/2" | 28,000 | 1,680 | 736 × 139.7 mm | 9.6 kg | PFIW20-175V |
| PFIW20-200 | G 3" | 40,000 | 2,400 | 979 × 139.7 mm | 13.7 kg | PFIW20-200V |
| PFIW20-240 | G 3" | 60,000 | 3,600 | 1,041 × 168.3 mm | 18.5 kg | PFIW20-240V |
| PFIW20-450 | DN100 flange | 84,000 | 5,040 | 981 × 219.1 mm | 56 kg | 3× PFIW20-175V |
| PFIW20-600 | DN100 flange | 112,000 | 6,720 | 1,240 × 219.1 mm | 60 kg | 3× PFIW20-200V |
| PFIW20-900 | DN150 flange | 160,000 | 9,600 | 1,311 × 273 mm | 90 kg | 4× PFIW20-200V |
| PFIW20-1200 | DN150 flange | 224,000 | 13,440 | 1,330 × 323.9 mm | 112 kg | 6× PFIW20-200V |
| PFIW20-1800 | DN200 flange | 288,000 | 17,280 | 1,496 × 406.4 mm | 201 kg | 8× PFIW20-200V |
| PFIW20-2000 | DN200 flange | 352,000 | 21,120 | 1,496 × 406.4 mm | 202 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 PFN25 coarse filter, before the PFN5 basic filter or the PFM fine pre-filter — instead of the PFI20 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.
| PFIW20 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 |
| 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 PFIW20-010. The same element also fits the HPFIW20-010, WFITIW20-010, WFIFIW20-010, 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 PF filters, the manufacturer offers the AOK20SS stainless steel float drain up to 20 bar and +65 °C. The drain outlet in the bottom has a G 1/4" thread, G 1" for the flanged sizes.
Replace the element at least once every 12 months. Once a year, also check the housing for visible damage.
Accessories for PFIW20 filters
The same stage in other ranges
Stage IW20 also comes in the HPFIW20 filters up to 50 bar, WFITIW20 filters up to 14 bar, WFIFIW20 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 PFIW20 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 PFI20?
- 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
Product sorting
List of products
With a G 1/4" connection and a flow of 1,250 l/min at 7 bar, the PFIW20-005 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a G 3/8" connection and a flow of 1,750 l/min at 7 bar, the PFIW20-007 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a G 1/2" connection and a flow of 2,500 l/min at 7 bar, the PFIW20-010 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a G 3/4" connection and a flow of 3,750 l/min at 7 bar, the PFIW20-018 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a G 1" connection and a flow of 5,250 l/min at 7 bar, the PFIW20-030 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a G 1 1/4" connection and a flow of 7,000 l/min at 7 bar, the PFIW20-047 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a G 1 1/2" connection and a flow of 10,000 l/min at 7 bar, the PFIW20-070 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a G 2" connection and a flow of 15,000 l/min at 7 bar, the PFIW20-094 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 PFIW20-1200 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a G 2" connection and a flow of 21,000 l/min at 7 bar, the PFIW20-150 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....
With a G 2 1/2" connection and a flow of 28,000 l/min at 7 bar, the PFIW20-175 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a DN200 connection and a flow of 288,000 l/min at 7 bar, the PFIW20-1800 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a G 3" connection and a flow of 40,000 l/min at 7 bar, the PFIW20-200 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 PFIW20-2000 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after...
With a G 3" connection and a flow of 60,000 l/min at 7 bar, the PFIW20-240 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 PFIW20-450 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 112,000 l/min at 7 bar, the PFIW20-600 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 160,000 l/min at 7 bar, the PFIW20-900 welded pre-filter traps solid contaminants larger than 20 µm and protects the finer stages after it....