They are cheap, even if strong, filtering cells at medium efficiency, composed of a self-extinguishing (F1 class according to DIN 53438) synthetic filtering media, kept by two zinc-plated wire nets and boxed into a galvanized steel frame.
APPLICATIONS
The filter mats normally used make them suitable to retain coarse dust particles (PM10).
They are used for fan-coil, air treatment units, warm air generators, ventilation equipement of machines and as prefilters to filters having higher performances (like LOM-BAG pockets filters, rigid pockets or activated carbon filters).
FEATURES
The filtration classes of these filters, according to EN 779:2012 Standards, are G2 for CK filters with 12 mm thickness, G3 for CK filters with 23 mm and 48 mm thickness and G4 for CS filters.
The table below shows the capacities and the pertaining initial resistance for the standard sizes:
| dimensions [mm] | capacity [m3/h] | pressure drop [Pa] | capacity [m3/h] | pressure drop [Pa] | ||||
| G2 | G3 | G4 | G2 | G3 | G4 | |||
| 400 x 500 | 630 | 10 | 15 | 25 | 950 | 15 | 25 | 40 |
| 400 x 625 | 800 | 1200 | ||||||
| 500 x 500 | 800 | 1200 | ||||||
| 500 x 625 | 1010 | 1520 | ||||||
| 595 x 595 | 1140 | 1710 | ||||||
| 287 x 595 | 520 | 780 | ||||||
The limit working temperature is of 90°C approx.
These filtering cells can be supplied with different dimensions and thicknesses from the standard above ones, and with mattresses having different composition (glass fibres, polyurethane foam, etc.) and/or performances.
INSTALLATION & SERVICE
The CK and CS filters can be installed into C-shaped guides or into holding frames at frontal access. Replace or regenerate the cells once having reached a resistance of 200 Pa. Clean by shaking (in case of rough and dry dust) or by counter current air or by warm water and cleaning agent.