Compressed air filters remove particles, water and oil from the compressed air. They protect pipework, machines, tools and products and ensure the air quality to ISO 8573-1 that your process requires. CompAir filters are independently tested to ISO 12500-1 and operate with a consistently low differential pressure.
Why filter?
Without suitable filtration, dirt, oil and water get into the network. The consequences cost more than any filter:
- Deposits in pipework, corrosion in pressure vessels
- Damage to machines, air motors, tools, valves and cylinders
- Premature exhaustion of the desiccant in desiccant dryers
- Contaminated products, rejects and complaints
Filter grades
B, C, D, E
Flow rate
up to 516 m³/min
Testing
ISO 12500-1
The filter grades
| Type | Purpose | Removal |
|---|---|---|
| B | General protection | Particles down to 1 µm, including water and oil aerosols |
| C | High-efficiency oil and dust filtration | Particles down to 0.01 µm, including water and oil aerosols |
| D | Oil vapours and odours | Residual oil content below 0.003 mg/m³ |
| E | General dust filtration | Dust particles down to 1 µm |
Usually several stages work together: water separator, pre-filter, high-efficiency filter and, if required, activated carbon. Which combination is needed depends on flow rate, pressure, contamination and the required purity class.
The product lines
Water separators · CF filters · High pressure · High temperature · Activated carbon · Flanged filters
X series water separators
0.6 to 200 m³/min
The water separators remove condensate, water and oil by directional and centrifugal separation. Installed upstream of a coalescing filter, they protect it from liquid so that it works longer and more efficiently.
- For 0.6 to 200 m³/min (at 20 °C, 7 bar)
- Low differential pressure
- Very little maintenance
CF series filters
Cast housings in filter grades B, C, D and E
CF filters remove water and oil aerosols, dust, solids, rust, pipe scale and microorganisms from the air. The filter elements can be changed quickly.
- Four filter grades
- Consistently low differential pressure
- Tested to ISO 12500-1
High-pressure filters
Up to 45 bar and 100 °C
Particularly robust filters for high-pressure networks, for example for PET blow moulding machines.
- CF018L3/8"-HP to CF416L1"-HP
- 1.8 to 41.6 m³/min
- Up to 45 bar, up to 100 °C
High-temperature filters
Up to 150 °C, briefly up to 210 °C
For hot compressed air, for example directly downstream of oil-free compressors. Available for dust, general applications and high-efficiency filtration.
- 0.5 to 516 m³/min (at 20 °C, 7 bar)
- Continuous operation up to 150 °C
- Peaks up to 210 °C
CFT activated carbon
Removing oil vapours for ISO class 1
Where ISO class 1 air is required, the CFT activated carbon filter removes the oil vapours, downstream of both oil-free and oil-lubricated compressors. The compact cartridges are densely packed and quick to change.
- For ISO 8573-1 class 1
- Downstream of oil-free and oil-lubricated compressors
- Cartridges for easy maintenance
CF series flanged filters
For large flow rates, 48 to 516 m³/min
For large systems and higher pressures, CF filters are available with flanged connections in all four filter grades.
- 48 to 516 m³/min
- Four filter grades
- For higher pressures
Frequently asked questions
What compressed air quality do I need?
That depends on the application. ISO 8573-1 defines classes for particles, water and oil; the lower the number, the purer the air. Food, pharmaceuticals and electronics usually require stricter classes than a workshop.
Where do the filters go?
Typically: water separator after the compressor, pre-filter before the dryer, fine filter after it and, where necessary, activated carbon directly before the point of use. We plan the sequence for your network.
How often do the filter elements need to be changed?
As a rule once a year, or when the differential pressure becomes too high. Clogged filters cost energy, because the compressor has to work against a higher pressure.
Who maintains the compressor?
We do. As the CompAir partner for north-western Switzerland, we maintain and repair your system with genuine spare parts and service kits. If your compressed air supply fails, you can reach our on-call service on 062 552 00 88.
Downloads
Which filters does your system need?
Compressor, drying, filtration and condensate drainage must work together. We design the treatment for the air quality your application needs, install it and take care of service.