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Personnel and Material Decontamination Equipment
Fixed Doorway Blow-Off Portal
A fixed doorless blow-off portal that directs filtered air across personnel at a compact doorway without creating a full enclosed air-shower chamber.
- Doorless Fixed Portal
- Side-Mounted Blow-Off Nozzles
- Compact Doorway Treatment
- Open High-Speed Passage
Product Introduction
The fixed doorway blow-off portal is a permanent doorless open frame around a personnel opening, not a closed booth or a tall enclosed filtration tower. Compact side casings contain the air equipment and nozzle manifolds, while an overhead bridge ties the two posts together. Presence sensing can activate the blow-off airflow as personnel cross the open portal, providing a practical dust-removal point where a full airlock is not required.
Key Features
Side-mounted blow-off nozzles direct air across the passing person.
An overhead bridge aligns the two portal posts and protects routed wiring.
Lower inlet sections collect part of the disturbed dust close to footwear level.
Presence sensing can reduce operation when the passage is unoccupied.
Customer Product Concerns
A fixed open portal must fit a shallow doorway while delivering useful airflow and retaining a stable structural connection to the surrounding partition.
The site does not have depth for a two-door chamber.Blow-off components are packaged in slim side casings around the existing opening.
Fast-moving personnel receive very brief airflow exposure.A closely spaced nozzle array can cover the crossing zone while presence sensing activates the system.
Two independent posts can lose alignment over time.A rigid overhead bridge and fixed anchors tie both posts into one portal frame.
A full enclosed unit would obstruct a busy passage.The doorless format preserves an open high-speed walking route.
Typical Applications
Doorless electronics gowning routesCompact laboratory entrancesTemporary clean-booth accessHigh-throughput personnel crossings
Technical Parameters
Typical structural ranges for a fixed doorless blow-off portal are shown below.
| Core Material | Fixed powder-coated steel portal with side-mounted filtered-air blow-off manifolds, lower inlet sections and a reinforced overhead bridge |
|---|---|
| Panel Thickness | 1.0-1.2 mm side-casing and bridge panels |
| Effective Width | 900-1400 mm clear doorless opening |
| Maximum Length | Up to 1800 mm overall portal span |
| Steel Facing Thickness | 1.0-1.2 mm formed steel sheet at the posts and bridge |
| Core Density | 30-45 kg/m³ acoustic PET-fibre infill in the side equipment casings |
| Thermal Conductivity | 0.034-0.040 W/(m·K) for the acoustic casing infill |
| Surface Finish | White powder-coated portal with brushed stainless nozzle and inlet faces |
| Joint Type | Bolted post-to-bridge connections with fixed base anchors and removable service covers |
| Customization | Available based on the intended application and operating environment. |
Available Options
Standard or widened clear openingPresence sensor and status lightFixed base plates or wall bracingIntegrated ionising bar
Planning a Fixed Doorway Blow-Off Portal specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
