WFIFP fibre pre-filters for dust up to 14 bar
The WFIFP fibre pre-filter has a pleated element of acrylic fibres and cellulose and traps solid particles and dust larger than 3 µm — solid particle class 6 according to ISO 8573-1. The housing is made of stainless steel 1.4404.
The WFIFP 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.
WFIFP filters by size
The size determines the connection and the flow. Each size has its own PF range spare element.
| WFIFP 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 |
| WFIFP-010 | DN15 flange | 2,500 | 150 | 230 × 76.1 mm | 3.5 kg | PFP-010V |
| WFIFP-018 | DN20 flange | 3,750 | 225 | 263 × 76.1 mm | 4.3 kg | PFP-018V |
| WFIFP-030 | DN25 flange | 5,250 | 315 | 279 × 88.9 mm | 5.7 kg | PFP-030V |
| WFIFP-047 | DN32 flange | 7,000 | 420 | 348 × 88.9 mm | 6.6 kg | PFP-047V |
| WFIFP-070 | DN40 flange | 10,000 | 600 | 391 × 114.3 mm | 8 kg | PFP-070V |
| WFIFP-094 | DN50 flange | 15,000 | 900 | 444 × 114.3 mm | 9.8 kg | PFP-094V |
| WFIFP-150 | DN50 flange | 21,000 | 1,260 | 571 × 114.3 mm | 11 kg | PFP-150V |
| WFIFP-175 | DN65 flange | 28,000 | 1,680 | 752 × 139.7 mm | 14.2 kg | PFP-175V |
| WFIFP-200 | DN80 flange | 40,000 | 2,400 | 978 × 139.7 mm | 21.2 kg | PFP-200V |
| WFIFP-240 | DN80 flange | 60,000 | 3,600 | 1,041 × 168.3 mm | 22.9 kg | PFP-240V |
| WFIFP-450 | DN100 flange | 84,000 | 5,040 | 981 × 219.1 mm | 55 kg | 3× PFP-175V |
| WFIFP-600 | DN100 flange | 112,000 | 6,720 | 1,288 × 219.1 mm | 64 kg | 3× PFP-200V |
| WFIFP-900 | DN150 flange | 160,000 | 9,600 | 1,310 × 273 mm | 87 kg | 4× PFP-200V |
| WFIFP-1200 | DN150 flange | 224,000 | 13,440 | 1,351 × 323.9 mm | 110 kg | 6× PFP-200V |
| WFIFP-1800 | DN200 flange | 288,000 | 17,280 | 1,496 × 406.4 mm | 200 kg | 8× PFP-200V |
| WFIFP-2000 | DN200 flange | 352,000 | 21,120 | 1,496 × 406.4 mm | 200 kg | 10× PFP-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 fibre pre-filter P is suitable where the air contains dust and finer contaminants that a stainless steel mesh lets through. The element only withstands +65 °C — for warmer air, there are meshes and sintered elements up to +150 °C.
The manufacturer does not state an oil class for it; oil aerosol is handled by the fine pre-filter M.
Where to place it
After the WFIFN5 basic filter or the WFIFI20 sintered pre-filter, before the WFIFR dust filter or the WFIFM fine 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.
| WFIFP 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 PFP-010V for the WFIFP-010. The same element also fits the PFP-010, HPFP-010, WFITP-010, WFIWP-010 and WHFITP-010. Flanged filters from DN100 have several elements — their number is given in the table for each size. Element working temperature +1.5 to +65 °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 WFIFP 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 P also comes in the PFP filters up to 14 bar, HPFP filters up to 50 bar, WFITP filters up to 14 bar, WFIWP filters up to 14 bar and WHFITP filters up to 50 bar. The elements are the same for all ranges.
Ventilek’s tip
Fibres only up to +65 °C. The fibre element P is suitable for cooler air. For warmer air, choose the N5 mesh or a sintered pre-filter — they withstand +150 °C.
- What filtration rating does the WFIFP fibre pre-filter have?
- The element traps particles larger than 3 µm, solid particle class 6 according to ISO 8573-1.
- What temperature does it withstand?
- The element from +1.5 to +65 °C.
- When should the element be replaced?
- At least once every 12 months.
Product sorting
List of products
With a DN15 connection and a flow of 2,500 l/min at 7 bar, the WFIFP-010 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN20 connection and a flow of 3,750 l/min at 7 bar, the WFIFP-018 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN25 connection and a flow of 5,250 l/min at 7 bar, the WFIFP-030 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN32 connection and a flow of 7,000 l/min at 7 bar, the WFIFP-047 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN40 connection and a flow of 10,000 l/min at 7 bar, the WFIFP-070 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN50 connection and a flow of 15,000 l/min at 7 bar, the WFIFP-094 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN150 connection and a flow of 224,000 l/min at 7 bar, the WFIFP-1200 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according...
With a DN50 connection and a flow of 21,000 l/min at 7 bar, the WFIFP-150 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN65 connection and a flow of 28,000 l/min at 7 bar, the WFIFP-175 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN200 connection and a flow of 288,000 l/min at 7 bar, the WFIFP-1800 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according...
With a DN80 connection and a flow of 40,000 l/min at 7 bar, the WFIFP-200 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN200 connection and a flow of 352,000 l/min at 7 bar, the WFIFP-2000 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according...
With a DN80 connection and a flow of 60,000 l/min at 7 bar, the WFIFP-240 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN100 connection and a flow of 84,000 l/min at 7 bar, the WFIFP-450 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN100 connection and a flow of 112,000 l/min at 7 bar, the WFIFP-600 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...
With a DN150 connection and a flow of 160,000 l/min at 7 bar, the WFIFP-900 fibre pre-filter traps solid particles and dust larger than 3 µm, solid particle class 6 according to...