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FFU et équipement de purification de l'air terminal
Unité d'alimentation en air HEPA à pression positive
A portable duct-ready blower that draws source air through staged filtration and delivers HEPA-filtered air into a room to establish a controlled outward pressure bias.
- Filtered Supply Air
- Duct-Ready Positive Flow
- Variable EC Blower
- Sealed HEPA Final Stage
Introduction de produit
The positive-pressure HEPA air supply unit is arranged with a protected intake, coarse prefilter, optional molecular stage, EC centrifugal blower and final HEPA cassette. Clean air exits through a sealed round supply collar that can connect to a temporary room, enclosure or clean booth. A variable-speed controller sets the delivered airflow, while a filter pressure gauge indicates increasing resistance. Because the unit adds filtered air rather than exhausting room air, pressure is established only when the served enclosure and relief path are appropriately sized.
Key Features
The final HEPA stage is positioned downstream of the blower to capture particles released inside the unit.
Variable EC drive allows the supply volume to be matched to leakage and relief airflow.
A differential-pressure gauge provides a visible indication of combined filter loading.
Préoccupations du client produit
A temporary clean enclosure needs controlled filtered make-up air, not merely room-air recirculation, to maintain outward leakage at openings.
A recirculating purifier reduces particles but does not add enough air to create positive pressure.The ducted outlet supplies HEPA-filtered air from outside the served enclosure.
Leakage varies when doors, cable openings or softwall panels move.Variable fan control allows the supply flow to be adjusted to the actual leakage path.
Particles from a fan or internal cabinet surface can enter the protected space.The downstream HEPA cassette filters the complete airflow immediately before discharge.
Operators cannot see when accumulated dust is reducing the delivered airflow.A filter pressure indicator shows the resistance trend across the installed stages.
Les applications typiques
Temporary positive-pressure cleanroomsPortable inspection enclosuresClean construction zonesSensitive equipment protectionEmergency clean-air supply
Paramètres techniques
Typical construction ranges for a portable positive-pressure HEPA supply unit are shown below.
| Matériaux de base | EC centrifugal blower with prefilter, optional carbon stage and downstream micro-glass H13-H14 HEPA filter |
|---|---|
| Panneau épaisseur | 450-800 mm enclosure depth |
| Largeur effective | 500-900 mm cabinet width |
| Longueur maximale | Up to 1200 mm overall unit height including caster base |
| Acier face épaisseur | 1.0-1.5 mm powder-coated steel or 304 stainless-steel pressure enclosure |
| Densité Core | Approximately 90-120 kg/m³ compacted density of the HEPA pack used in the positive-pressure supply unit |
| Conductivité thermique | Approximately 0.035-0.043 W/(m·K) for the HEPA pack used in the positive-pressure air supply path |
| surface finie | Cleanroom-white powder coat with blue supply collar, stainless handles and non-marking casters |
| Type joint | Gasketed filter tracks with clamped access door and sealed round or rectangular clean-air supply flange |
| Customisation | Disponible en fonction de l'application prévue et de l'environnement d'exploitation. |
Options disponibles
Round or rectangular supply connectionHEPA H13 or H14 final stagePrefilter and carbon configurationsCaster-mounted or stationary base
Planning a Positive-Pressure HEPA Air Supply Unit specification?
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