The handbook describes the PMFA series of low‑profile filter assemblies designed for 80 mm and 119 mm PAPST axial fans. It covers construction details such as the outer cover, filter pad, mesh screen, and finger guard molded from Zytel nylon resin, as well as the optional three‑part design with polycarbonate grill cover and inner fixing plate.\n\nPerformance data include dust particle retention rates, temperature resistance, and expected airflow reduction. Ordering tables list part numbers for filter assemblies and spare pads for various fan sizes, making it a quick reference for selecting and replacing filters without shutting down the fan.
| Filter pad type | KS-22 (white polyester) |
|---|---|
| Dust particle retention (KS‑22 pad) | 60 % |
| Airflow reduction (KS‑22 pad) | 10‑30 % |
| Dust particle retention (P15/150R pad) | 75 % |
| Particle size capability (P15/150R pad) | 5‑10 µm |
| Temperature resistance (P15/150R pad) | 100 °C |
| Flame resistance (P15/150R pad) | BS2963 compliant |
| Airflow reduction (P15/150R pad) | 20‑30 % |
| Supported fan sizes | 60 mm to 172 mm |
The KS‑22 pad achieves a 60 % dust particle retention rate.
The assemblies fit fans ranging from 60 mm up to 172 mm in diameter.