Coalescing filtersseries MJF |
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| A range of fine filters designed primarily as main filters in compressed air supply systems. The filter cartridges have up to 98% pore volume, which ensures long service life and low operating costs. Thanks to the folded design of the filter media, the cartridge provides a significantly larger filtration area than a conventional cylindrical filter. This means a higher dirt retention capacity, lower pressure losses and thus more economical operation. The internal and external stainless steel reinforcements of the filter cartridge protect the filter media and form a mechanical pre-filter, which increases the efficiency of dirt separation. |
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Technical data
| Size | 10F | 15F | 25F | 40F | 60F | 100F | 150F |
| Thread | R1/2" | R3/4" | R1" | R1 1/2" | R1 1/2" | R2" | R2 1/2" |
| Max. capacity [Nm3/min] at 0,7 MPa | 1,6 | 2,4 | 3,6 | 5,5 | 8,1 | 15 | 25 |
| Weight [kg] | 1.3 | 1.3 | 3.6 | 3.6 | 6.7 | 8.9 | 11.0 |
| Filter element | CP | TU | AH | HC |
| Features | coarse pre-filtration | general pre-filtration | high perf. filtration | activated carbon filter |
| Size of particles removed [μm] | 3,0 | 1,0 | 0,01 | - |
| Oil contaminant retention down to [mg/m3] | - | 0,1 | 0,01 | 0,003 |
| Nominal initial pressure drop [mbar] | 0,03 | 0,05 | 0,09 | 0,1 |
| Max. operating temperature [°C] | 80 | 60 | 60 | 60 |
| Life time [h] | 8000 | 8000 | 8000 | 1000 |
Filter size selection
To correctly select the filter size, it is necessary to base it on the lowest inlet pressure and the highest expected flow rate.
- Determine the value of the minimum working (inlet) pressure (e.g. 0,55 MPa) and the maximum compressed air flow rate (e.g. 5 Nm3/min) at the filter inlet.
- Select the conversion factor corresponding to the minimum inlet pressure from the table below (always round the pressure down, e.g. for 0,45 MPa, use the correction factor 1,54 (value for 0,4 MPa)).
- Calculate the minimum filtration capacity by multiplying the required flow rate by the conversion factor (e.g. 5 * 1,54 = 7,7)
- Select the filter model using the minimum filtration capacity value (the selected filter must have a flow rate equal to or greater than the calculated minimum filtration capacity). So for our example we cannot choose size 40F which would correspond to the required flow rate of 5 Nm3/min, but we must choose size 60F which corresponds to the calculated minimum filtration capacity of 7,7 Nm3/min.
| Inlet pressure [MPa] | 0,1 | 0,2 | 0,3 | 0,4 | 0,5 | 0,6 | 0,7 | 0,8 | 0,9 | 1,0 | 1,1 | 1,2 | 1,3 | 1,4 | 1,5 | 1,6 |
| Conversion factor | 4,00 | 2,63 | 2,00 | 1,54 | 1,33 | 1,14 | 1,00 | 0,88 | 0,80 | 0,72 | 0,67 | 0,61 | 0,57 | 0,53 | 0,50 | 0,47 |
Example of use
The TU cartridge filter is installed after the desicant air dryer to remove mechanical impurities from the dryer. However, it must be connected in reverse and automatic drain is not required.
The HC cartridge filter is used to remove oil mist and odors. Automatic drain and differential pressure gauge are not required.