They are pleated filtering cells with medium gravimetric efficiency, cheap but strong and they are composed of a self-extinguishing (F1 according to DIN 53438) synthetic fiber filtering media, kept by two zinc-plated wire nets and boxed into a 6/10 mm zinc-plated sheet frame. The pleating according to which the nets and media are fitted ensures a real filtering surface by two to three times higher than the frontal surface of the cell.
Applications
They are used either as final filters or as pre-filters to filters having higher efficiency (like LOM-BAG pockets filters, V-cell filters or activated carbon filters) in ventilation and air treatment units, when it is necessary to combine good air flows with reduced passage sections.
Features
The CZ type cells are proposed with filtering mats with ISO Coarse 50% efficiency according to EN ISO 16890 (G3 according to EN 779:2012); those of type CZQ and CZS (characterized by a more resistant containment mesh) are instead built with ISO Coarse 60% efficiency mats (G4 according to EN 779:2012).
The table below shows the capacities and the pertaining initial resistance for the standard available sizes.
| Dimensions [mm] |
Pressure drop for filters with thickness 48 mm [Pa] | Pressure drop for filters with thickness 98 mm [Pa] | ||||||||||
| Capacity [m³/h] |
ISO Coarse | Capacity [m³/h] |
ISO Coarse | Capacity [m³/h] |
ISO Coarse | Capacity [m³/h] |
ISO Coarse | |||||
| 50% | 60% | 50% | 60% | 50% | 60% | 50% | 60% | |||||
| 400 x 500 | 1260 | 38 | 40 | 1900 | 68 | 70 | 1900 | 50 | 55 | 2850 | 94 | 100 |
| 400 x 625 | 1600 | 2400 | 2400 | 3600 | ||||||||
| 500 x 500 | 1600 | 2400 | 2400 | 3600 | ||||||||
| 500 x 625 | 2020 | 3030 | 3030 | 4550 | ||||||||
| 595 x 595 | 2280 | 3420 | 3420 | 5130 | ||||||||
| 287 x 595 | 1040 | 1560 | 1560 | 2340 | ||||||||
The limit working temperature is 90°C approx.
The CZ, CZQ and CZS filtering cells can be supplied with different dimensions and thicknesses from the standard above ones and with mattresses having different compositions (glass fibers, polyurethane foam etc) and/or performances.
Installation & service
The CZ, CZQ and CZS 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÷250 Pa. Clean by shaking (in case of rough and dry dust) or by counter current air or by warm water and cleaning agent.