ventilating equipment: filters
FFK Cassette duct filter
Cassette for rectangular ducts for F5 and F7 class pocket filter cartridges. Cassette case made of galvanized steel sheet. Inspection cover for changing filters mounted on hinges and snap fasteners. The cassette is installed in the channel through the flange connections.
The cassette can be installed horizontally or vertically in the duct. It should be remembered that in the upright position the air flow is directed downwards (to ensure the correct positioning of the bags). The recommended maximum pressure drop for class F5 filters is 200 Pa, for F7 – 250 Pa, respectively. The cassettes are equipped with pressure gauges to measure the pressure drop.
| FFK | A | B | C | D | E | F |
| 30-15 | 340 | 190 | 402 | 250 | 320 | 170 |
| 40-20 | 440 | 240 | 502 | 350 | 420 | 220 |
| 50-25 | 540 | 290 | 532 | 350 | 520 | 270 |
| 50-30 | 540 | 340 | 562 | 350 | 520 | 320 |
| 60-30 | 640 | 340 | 642 | 350 | 620 | 320 |
| 60-35 | 640 | 390 | 717 | 350 | 620 | 370 |
| 70-40 | 740 | 440 | 787 | 420 | 720 | 420 |
| 80-50 | 840 | 540 | 882 | 530 | 820 | 520 |
| 100-50 | 1040 | 540 | 882 | 530 | 1020 | 520 |
| FFK Cassette | Inset | Class |
| FFK 30-15 | BFK 30-15 | F5, F7 |
| FFK 40-20 | BFK 40-20 | F5, F7 |
| FFK 50-25 | BFK 50-25 | F5, F7 |
| FFK 50-30 | BFK 50-30 | F5, F7 |
| FFK 60-30 | BFK 60-30 | F5, F7 |
| FFK 60-35 | BFK 60-35 | F5, F7 |
| FFK 70-40 | BFK 70-40 | F5, F7 |
| FFK 80-50 | BFK 80-50 | F5, F7 |
| FFK 100-50 | BFK 100-50 | F5, F7 |
