All kinds of equipment and facilities need to remove oil pollution, dust removal and suspended particulate.
Filter Classes | |||||
Usage | Class | Performance | Performance test | Particulate size approaching 100% retention | Test Standard |
Coarse filters (used as Primary) |
G1 | 65% | Average value | >5 μm | BS EN779 |
G2 | 65–80% | Average value | >5 μm | BS EN779 | |
G3 | 80–90% | Average value | >5 μm | BS EN779 | |
G4 | 90%– | Average value | >5 μm | BS EN779 | |
Fine filters (used as Secondary) | M5 | 40–60% | Average value | >5 μm | BS EN779 |
M6 | 60–80% | Average value | >2 μm | BS EN779 | |
F7 | 80–90% | Average value | >2 μm | BS EN779 | |
F8 | 90–95% | Average value | >1 μm | BS EN779 | |
F9 | 95%– | Average value | >1 μm | BS EN779 | |
Semi HEPA | E10 | 85% | Minimum value | >1 μm | BS EN1822 |
E11 | 95% | Minimum value | >0.5 μm | BS EN1822 | |
E12 | 99.50% | Minimum value | >0.5 μm | BS EN1822 | |
HEPA | H13 | 99.95% | Minimum value | >0.3 μm | BS EN1822 |
H14 | 100.00% | Minimum value | >0.3 μm | BS EN1822 | |
ULPA | U15 | 100.00% | Minimum value | >0.3 μm | BS EN1822 |
U16 | 100.00% | Minimum value | >0.3 μm | BS EN1822 | |
U17 | 100.00% | Minimum value | >0.3 μm | BS EN1822 |