WHFIT welded stainless steel filters with a thread up to 50 bar
WHFIT filters from the manufacturer Omega Air have a welded housing made of stainless steel 1.4404 with threaded connections for pressures up to 50 bar and FKM seals. The manufacturer designs them for compressed air and other gases where there is a risk of corrosion or where the housing must be made of stainless steel.
Twelve filtration stages: a cyclone separator with a cyclone element, 25 and 5 µm stainless steel meshes, 20 and 1 µm sintered and welded pre-filters, a 3 µm fibre pre-filter, a 1 µm dust filter, a 0.1 µm fine pre-filter, a 0.01 µm microfilter and activated carbon. The range has 8 sizes with G 1/2" to G 3" threads, with flows of 2,500 to 40,000 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.
WHFITC cyclone separators
The cyclone element separates water and oil droplets; the first stage of the range.
WHFITA activated carbon filters
Oil vapours, hydrocarbons and odours; class 1-x-1 with a microfilter before it.
Stages at a glance
The ISO 8573-1 class is written as solid particles – water – oil.
| WHFIT filtration stages | |||||
|---|---|---|---|---|---|
| Stage | Filtration rating | ISO 8573-1 class | Residual oil | Element material | Temperature up to |
| C – cyclone separator | – | – | – | cyclone element | +120 °C |
| N25 – coarse filter | 25 µm | – | – | stainless steel mesh 1.4301 | +150 °C |
| I20 – sintered pre-filter | 20 µm | – | – | sintered stainless steel 1.4404 | +150 °C |
| IW20 – welded pre-filter | 20 µm | – | – | sintered stainless steel 1.4404 | +150 °C |
| N5 – basic filter | 5 µm | – | – | stainless steel mesh 1.4301 | +150 °C |
| P – fibre pre-filter | 3 µm | 6-x-x | – | acrylic fibres and cellulose | +65 °C |
| I1 – sintered pre-filter | 1 µm | – | – | sintered stainless steel 1.4404 | +150 °C |
| IW1 – welded pre-filter | 1 µm | – | – | sintered stainless steel 1.4404 | +150 °C |
| R – dust filter | 1 µm | 3-x-x | – | borosilicate microfibres | +120 °C |
| M – fine pre-filter | 0.1 µm | 2-x-2 | < 0.1 mg/m³ | borosilicate microfibres | +120 °C |
| S – microfilter | 0.01 µm | 1-x-1 | < 0.01 mg/m³ | borosilicate microfibres | +120 °C |
| A – activated carbon filter | – | 1-x-1 | – | borosilicate microfibres and activated carbon | +45 °C |
Solid particle class 1 for activated carbon A only applies when an S microfilter is installed before it. 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.
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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. Only the stages needed for the required air purity are installed in the air line.
The cyclone separator C is at the start and separates condensate droplets. The welded pre-filters IW20 and IW1 are a different design of the 20 and 1 µm stages — they are used instead of the sintered I20 and I1. The fine pre-filter M goes before the microfilter S and protects its element; a microfilter S goes before activated carbon A.
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; the cyclone separator has a cyclone element.
Height A is 244 to 1,028 mm, the weight 2.6 to 11.5 kg.
| WHFIT filter sizes | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Connection | Pressure | Nm³/h at 7 bar | l/min at 7 bar | A | B | C | Weight | Elements |
| 010 | G 1/2" | 50 bar | 150 | 2,500 | 244 mm | 121 mm | 76.1 mm | 2.6 kg | 1 |
| 018 | G 3/4" | 50 bar | 225 | 3,750 | 268 mm | 121 mm | 76.1 mm | 2.8 kg | 1 |
| 030 | G 1" | 50 bar | 315 | 5,250 | 302 mm | 143 mm | 88.9 mm | 3.4 kg | 1 |
| 047 | G 1 1/4" | 50 bar | 420 | 7,000 | 368 mm | 160 mm | 88.9 mm | 3.9 kg | 1 |
| 070 | G 1 1/2" | 50 bar | 600 | 10,000 | 402 mm | 182 mm | 114.3 mm | 5.6 kg | 1 |
| 094 | G 2" | 50 bar | 900 | 15,000 | 469 mm | 180 mm | 114.3 mm | 6.2 kg | 1 |
| 150 | G 2" | 50 bar | 1,260 | 21,000 | 606 mm | 180 mm | 114.3 mm | 6.9 kg | 1 |
| 200 | G 3" | 50 bar | 2,400 | 40,000 | 1,028 mm | 228 mm | 139.7 mm | 11.5 kg | 1 |
A height, B width across the connections, C housing diameter. Dimensions 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 higher pressure the filter passes more air: 2.13 times as much at 16 bar and 6.38 times as much at 50 bar.
| WHFIT filter flow in l/min by pressure | ||||
|---|---|---|---|---|
| Size (connection) | 7 bar | 16 bar | 30 bar | 50 bar |
| 010 (G 1/2") | 2,500 | 5,325 | 9,700 | 15,950 |
| 018 (G 3/4") | 3,750 | 7,988 | 14,550 | 23,925 |
| 030 (G 1") | 5,250 | 11,183 | 20,370 | 33,495 |
| 047 (G 1 1/4") | 7,000 | 14,910 | 27,160 | 44,660 |
| 070 (G 1 1/2") | 10,000 | 21,300 | 38,800 | 63,800 |
| 094 (G 2") | 15,000 | 31,950 | 58,200 | 95,700 |
| 150 (G 2") | 21,000 | 44,730 | 81,480 | 133,980 |
| 200 (G 3") | 40,000 | 85,200 | 155,200 | 255,200 |
Housing and connection
Housing: welded stainless steel 1.4404 for pressures up to 50 bar, 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.
For oil separation, a coalescing element (fine pre-filter M or microfilter S) is fitted in the housing; the air flows through it from the inside out, and the filter is mounted head up with the bowl down.
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 WHFIT filters, the manufacturer offers the AOK50SS stainless steel float drain up to 50 bar, recommended from 10 bar, or the TD420M timed drain with a G 1/4" thread, 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), WFIT filters (14 bar), WFIF filters (14 bar, 10 bar from DN100) and WFIW filters (14 bar).
Ventilek’s tip
A drain rated for 50 bar. The WHFIT range needs a drain for the same pressure: the AOK50SS float drain, recommended from 10 bar, or the TD420M timed drain with a G 1/4" thread.
- What pressure are WHFIT filters rated for?
- Up to 50 bar. The housing withstands −20 to +150 °C; the elements have their own temperature limit.
- How does it differ from the HPF range?
- Both ranges work up to 50 bar and take PF range elements. HPF has a polished housing and EPDM seals, WHFIT a welded housing, FKM seals and a cyclone separator C.
- How do I choose the size?
- By the flow at your pressure. The flows apply to 7 bar; at a higher pressure, multiply them by the correction factor — at 50 bar it is 6.38.
- Is a condensate drain included with the filter?
- No, it is ordered separately. The AOK50SS float drain or the TD420M timed drain 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.
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WHFITC cyclone separators; with insert, no filter element
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WHFITN25 coarse filters; stainless steel mesh 25 um
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WHFITI20 sintered pre-filters; stainless, filtration to 20 um
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WHFITIW20 welded pre-filters; sintered, filtration to 20 um
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WHFITN5 basic filters; stainless steel mesh 5 um
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WHFITP fibre pre-filters; acrylic and cellulose, to 3 um
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WHFITI1 sintered pre-filters; stainless, filtration to 1 um
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WHFITIW1 welded pre-filters; sintered, filtration to 1 um
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WHFITR dust filters; filtration to 1 um
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WHFITM fine pre-filters; filtration to 0.1 um
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WHFITS microfilters; filtration to 0.01 um
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WHFITA activated carbon; oil vapours and odours
Bestsellers
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List of products
With a G 1/2" connection and a flow of 2,500 l/min at 7 bar, the WHFITA-010 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to 50 bar,...
With a G 3/4" connection and a flow of 3,750 l/min at 7 bar, the WHFITA-018 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to 50 bar,...
With a G 1" connection and a flow of 5,250 l/min at 7 bar, the WHFITA-030 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to 50 bar,...
With a G 1 1/4" connection and a flow of 7,000 l/min at 7 bar, the WHFITA-047 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to 50...
With a G 1 1/2" connection and a flow of 10,000 l/min at 7 bar, the WHFITA-070 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to 50...
With a G 2" connection and a flow of 15,000 l/min at 7 bar, the WHFITA-094 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to 50 bar,...
With a G 2" connection and a flow of 21,000 l/min at 7 bar, the WHFITA-150 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to 50 bar,...
With a G 3" connection and a flow of 40,000 l/min at 7 bar, the WHFITA-200 activated carbon filter removes oil vapours, hydrocarbons and odours. Working pressure up to 50 bar,...
With a G 1/2" connection and a flow of 2,500 l/min at 7 bar, the WHFITN5-010 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 50 bar, welded...
With a G 3/4" connection and a flow of 3,750 l/min at 7 bar, the WHFITN5-018 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 50 bar, welded...
With a G 1" connection and a flow of 5,250 l/min at 7 bar, the WHFITN5-030 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 50 bar, welded...
With a G 1 1/4" connection and a flow of 7,000 l/min at 7 bar, the WHFITN5-047 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 50 bar, welded...
With a G 1 1/2" connection and a flow of 10,000 l/min at 7 bar, the WHFITN5-070 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 50 bar, welded...
With a G 2" connection and a flow of 15,000 l/min at 7 bar, the WHFITN5-094 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 50 bar, welded...
With a G 2" connection and a flow of 21,000 l/min at 7 bar, the WHFITN5-150 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 50 bar, welded...
With a G 3" connection and a flow of 40,000 l/min at 7 bar, the WHFITN5-200 basic filter traps solid contaminants larger than 5 µm. Working pressure up to 50 bar, welded...
With a G 1/2" connection and a flow of 2,500 l/min at 7 bar, the WHFITN25-010 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 WHFITN25-018 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 WHFITN25-030 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 WHFITN25-047 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 WHFITN25-070 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 WHFITN25-094 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 WHFITN25-150 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 40,000 l/min at 7 bar, the WHFITN25-200 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 WHFITC-010 cyclone separator removes condensate droplets — water and oil droplets — from the air before they...
With a G 3/4" connection and a flow of 3,750 l/min at 7 bar, the WHFITC-018 cyclone separator removes condensate droplets — water and oil droplets — from the air before they...
With a G 1" connection and a flow of 5,250 l/min at 7 bar, the WHFITC-030 cyclone separator removes condensate droplets — water and oil droplets — from the air before they reach...
With a G 1 1/4" connection and a flow of 7,000 l/min at 7 bar, the WHFITC-047 cyclone separator removes condensate droplets — water and oil droplets — from the air before they...
With a G 1 1/2" connection and a flow of 10,000 l/min at 7 bar, the WHFITC-070 cyclone separator removes condensate droplets — water and oil droplets — from the air before they...
With a G 2" connection and a flow of 15,000 l/min at 7 bar, the WHFITC-094 cyclone separator removes condensate droplets — water and oil droplets — from the air before they...
With a G 2" connection and a flow of 21,000 l/min at 7 bar, the WHFITC-150 cyclone separator removes condensate droplets — water and oil droplets — from the air before they...
With a G 3" connection and a flow of 40,000 l/min at 7 bar, the WHFITC-200 cyclone separator removes condensate droplets — water and oil droplets — from the air before they...
With a G 1/2" connection and a flow of 2,500 l/min at 7 bar, the WHFITR-010 dust filter traps solid particles and dust larger than 1 µm, solid particle class 3 according to ISO...
With a G 3/4" connection and a flow of 3,750 l/min at 7 bar, the WHFITR-018 dust filter traps solid particles and dust larger than 1 µm, solid particle class 3 according to ISO...
With a G 1" connection and a flow of 5,250 l/min at 7 bar, the WHFITR-030 dust filter traps solid particles and dust larger than 1 µm, solid particle class 3 according to ISO...
With a G 1 1/4" connection and a flow of 7,000 l/min at 7 bar, the WHFITR-047 dust filter traps solid particles and dust larger than 1 µm, solid particle class 3 according to...
With a G 1 1/2" connection and a flow of 10,000 l/min at 7 bar, the WHFITR-070 dust filter traps solid particles and dust larger than 1 µm, solid particle class 3 according to...
With a G 2" connection and a flow of 15,000 l/min at 7 bar, the WHFITR-094 dust filter traps solid particles and dust larger than 1 µm, solid particle class 3 according to ISO...
With a G 2" connection and a flow of 21,000 l/min at 7 bar, the WHFITR-150 dust filter traps solid particles and dust larger than 1 µm, solid particle class 3 according to ISO...
With a G 3" connection and a flow of 40,000 l/min at 7 bar, the WHFITR-200 dust filter traps solid particles and dust larger than 1 µm, solid particle class 3 according to ISO...