Compact Filter (W Compact Filter)
Safe Air W Compact Filter offers advanced filtration with high efficiency and durability.
Check out the productA W compact filter does the same filtration duty as a bag filter, in a rigid body that needs less housing depth. The media is pleated into V-shaped packs within a fixed frame, which gives a large media area without the pockets a bag filter needs room to inflate.
Where the Rigid Format Earns Its Place
Short housings. Where the air handling unit cannot take the depth a bag filter needs, the rigid format fits the same duty into a shorter space.
High or variable airflow. A rigid body holds its shape. Bag filter pockets can flutter under high velocity or pulsing flow, which wears the media at the seams.
Damp airstreams. A rigid frame is less affected by humidity than a hanging pocket, which can sag onto its neighbour when wet.
Frequent handling. The frame tolerates service handling better than a pocket filter in installations where filters are changed often.
The format is intended for medium and fine filtration. It is not the right choice for the coarse stage at an air intake — a coarse filter loads with large dust quickly and is designed to be replaced, which is cheaper in a simpler format. For that stage see G3 G4 coarse bag filters or panel filters.
Class Selection
W compact filters are specified under EN ISO 16890 as ISO ePM10, ISO ePM2.5 or ISO ePM1, with the efficiency in 5% steps. The former EN 779 labels — M6, F7, F8, F9 — still appear in specifications; EN 779 was withdrawn on 11 July 2018 and the two standards do not convert one to one.
Higher-efficiency filtration above the fine range falls under a different standard, EN 1822, which covers EPA (E10–E12), HEPA (H13–H14) and ULPA (U15–U17). If your requirement is in that range, you need a HEPA product rather than a compact fine filter — see HEPA filters.
As with bag filters, ask for the discharged efficiency value alongside the initial one. ISO 16890 reports both, and the discharged figure is the better guide to service performance.
Media Area Variants
The same face size can be built with different media areas. More area at the same airflow gives a lower initial pressure drop and a longer interval before changeover, at a higher purchase price.
Which variant is worth it depends on your airflow, your energy cost and your change interval — not on the price of the filter alone. Tell us the design airflow and how often you currently change filters, and we will quote the variants against each other rather than just the cheapest.
What We Need to Quote
Required class or application · width × height × depth with units · whether those are filter or housing dimensions · design airflow per filter with units · acceptable initial pressure drop · final pressure drop for changeover · housing type and clamping arrangement · operating temperature and humidity · quantity and estimated annual quantity · destination country.