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FFU und Terminalluftreinigungsanlagen
Blower Filter Unit (BFU)
A deeper ceiling clean-air unit using a dedicated centrifugal blower to overcome duct, damper and final-filter resistance at elevated airflow.
- High-Pressure Centrifugal Blower
- Ducted or Recirculating Inlet
- Perforated Air Diffuser
- Large Airflow Capacity
Produkteinführung
The blower filter unit houses a forward- or backward-curved centrifugal blower above a full-size HEPA or ULPA filter in a deep insulated enclosure. Unlike a shallow grid FFU, the BFU is designed with enough chamber height for a larger scroll or blower wheel and can accept a round duct collar, inlet damper or recirculating top intake. An internal perforated plate distributes the higher-volume discharge over the filter surface. The format is suited to turbulent-flow rooms, high air-change zones and ceiling positions where a long duct path or loaded filter creates more resistance than a compact FFU can handle.
Key Features
The large pressure chamber reduces direct fan imprint before air reaches the HEPA or ULPA surface.
A removable perforated plate smooths the discharge and protects the downstream filter face during service.
Duct-connected and self-recirculating intake arrangements use the same ceiling-mounted enclosure platform.
Kunden Produktbedenken
Compact FFUs can lose airflow when the air path includes long ducts, dampers or a heavily loaded final filter.
Supply volume falls below target when duct and terminal pressure losses are added together.The larger centrifugal blower provides a higher available static-pressure range than a shallow axial module.
A concentrated blower outlet produces a visible high-velocity patch at the centre of the diffuser.The deep plenum and perforated equalising plate distribute pressure before final filtration.
A central air handler cannot independently trim airflow to one room or process zone.Each BFU can use its own speed setting or damper to balance the local ceiling supply.
Filter replacement requires dismantling the complete blower housing from above.A separated lower filter section permits the final filter and diffuser to be removed without lifting the blower assembly.
Typische Anwendungen
High air-change cleanroomsDucted pharmaceutical supply pointsElectronics packaging roomsFood processing clean zonesLarge clean booths and corridors
Technische Parameter
Typical BFU enclosure and filter ranges for cleanroom ceiling service are shown below.
| Core Material | Centrifugal blower, micro-glass HEPA or ULPA filter and optional closed-cell acoustic liner |
|---|---|
| Panel Dicke | 500-750 mm overall housing depth |
| Effektive Breite | 650-1300 mm nominal ceiling module width |
| Maximale Länge | Up to 1450 mm standard housing length |
| Stahl facing Dicke | 1.0-1.5 mm powder-coated steel or 304 stainless-steel blower-filter casing |
| Kerndichte | Approximately 24-48 kg/m³ density for optional closed-cell acoustic insulation |
| Thermische Leitfähigkeit | Approximately 0.033-0.040 W/(m·K) for the optional closed-cell acoustic liner |
| Oberfläche Finish | Ivory-white powder coat or brushed 304 stainless steel with stainless perforated diffuser |
| Gemeinsamer Typ | Flanged duct inlet with gasketed blower access panel and compression-seal or gel-seal final filter |
| Customisierung | Verfügbar je nach beabsichtigter Anwendung und Betriebsumgebung. |
Verfügbare Optionen
Forward- or backward-curved centrifugal blowerRound duct inlet or recirculating top grilleHEPA H14 or ULPA U15 final filterStepped, inverter or EC airflow control
Planning a Blower Filter Unit (BFU) specification?
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