WFIFM stainless fine pre-filters for particles and oil up to 14 bar
The WFIFM fine pre-filter traps fine solid particles larger than 0.1 µm, water and oil aerosol. The pleated element is made of borosilicate microfibres; residual oil is below 0.1 mg/m³ — class 2-x-2 according to ISO 8573-1.
The WFIFM filter comes in 11 sizes (DN15 to DN100) with flows of 2,500 to 84,000 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.
WFIFM filters by size
The size determines the connection and the flow. Each size has its own PF range spare element.
| WFIFM 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 |
| WFIFM-010 | DN15 flange | 2,500 | 150 | 230 × 76.1 mm | 3.5 kg | PFM-010V |
| WFIFM-018 | DN20 flange | 3,750 | 225 | 263 × 76.1 mm | 4.3 kg | PFM-018V |
| WFIFM-030 | DN25 flange | 5,250 | 315 | 279 × 88.9 mm | 5.7 kg | PFM-030V |
| WFIFM-047 | DN32 flange | 7,000 | 420 | 348 × 88.9 mm | 6.6 kg | PFM-047V |
| WFIFM-070 | DN40 flange | 10,000 | 600 | 391 × 114.3 mm | 8 kg | PFM-070V |
| WFIFM-094 | DN50 flange | 15,000 | 900 | 444 × 114.3 mm | 9.8 kg | PFM-094V |
| WFIFM-150 | DN50 flange | 21,000 | 1,260 | 571 × 114.3 mm | 11 kg | PFM-150V |
| WFIFM-175 | DN65 flange | 28,000 | 1,680 | 752 × 139.7 mm | 14.2 kg | PFM-175V |
| WFIFM-200 | DN80 flange | 40,000 | 2,400 | 978 × 139.7 mm | 21.2 kg | PFM-200V |
| WFIFM-240 | DN80 flange | 60,000 | 3,600 | 1,041 × 168.3 mm | 22.9 kg | PFM-240V |
| WFIFM-450 | DN100 flange | 84,000 | 5,040 | 981 × 219.1 mm | 55 kg | 3× PFM-175V |
The flows apply to a pressure of 7 bar and a temperature of +20 °C. Dimensions and weights according to the manufacturer’s technical data sheet; you will find further data on the product page of each filter.
#showmore#
When to use it
The fine pre-filter M is suitable when oil in the air is a problem and class 2 for particles and oil is enough. The element withstands +120 °C.
A fine pre-filter always goes before a microfilter: it traps most of the particles and oil, and the microfilter element then lasts longer.
Where to place it
After the WFIFI1 sintered pre-filter or the WFIFN5 basic filter; it is the finest stage of the WFIF range.
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.
| WFIFM 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 | – |
Element, condensate drainage and maintenance
A PF range element is fitted in the housing — for example, the PFM-010V for the WFIFM-010. The same element also fits the PFM-010, HPFM-010 and WFITM-010. Flanged filters from DN100 have several elements — their number is given in the table for each size. Element working temperature +1.5 to +120 °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 size DN100.
Replace the element at least once every 12 months. Once a year, also check the housing for visible damage.
Accessories for WFIFM 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 M also comes in the PFM filters up to 14 bar, HPFM filters up to 50 bar and WFITM filters up to 14 bar. The elements are the same for all ranges.
Ventilek’s tip
The fine pre-filter protects the microfilter. The microfilter element after it then only deals with the finest particles. A coarser stage should go before the fine pre-filter itself so that it does not clog with dust.
- What purity does the WFIFM fine pre-filter achieve?
- Particles down to 0.1 µm and residual oil below 0.1 mg/m³, class 2-x-2 according to ISO 8573-1.
- Why is it a pre-filter and not a microfilter?
- It is installed before the microfilter S and protects its element. The microfilter is the S stage with a filtration rating of 0.01 µm.
- What temperature does it withstand?
- The element up to +120 °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 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...