They are cheap, even if strong, filtering cells with medium gravimetric 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 equipment of machines and as prefilters to filters having higher performances (like LOM-BAG pockets filters, V-cell filters or activated carbon filters).
Features
The CK type cells are normally supplied with filtering mats with efficiencies ISO Coarse 35% and ISO Coarse 50% according to EN ISO 16890 (classes G2 and G3 according to EN 779:2012); the CS cells, characterized by a more robust structure, are instead produced with filtering mats with efficiency ISO Coarse 60% (class G4 according to EN 779:2012).
For the standard sizes available, the actual flow rates and their initial pressure drops are:
| Dimensions [mm] | Capacity [m3/h] | Pressure drop [Pa] | Capacity [m3/h] | Pressure drop [Pa] | ||||
| ISO Coarse | ISO Coarse | |||||||
| 35% | 50% | 60% | 35% | 50% | 60% | |||
| 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.