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Doorway-focused footprint
The treatment components sit beside the opening instead of occupying a full walk-in chamber.
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
- Unenclosed Personnel Opening
Product Introduction
The fixed doorway blow-off portal is a permanent doorless frame around a personnel opening, not a closed booth or a freestanding filtration tower. Its side casings accommodate the air equipment and nozzle manifolds, while an overhead bridge joins the posts into one assembly. Floor fixings retain the installation at the chosen doorway, with service covers opening to the selected access side. The portal adds a garment blow-off position without the depth and door sequence of a full chamber.
Key Features
Coordinated outlet banks
Opposed side fittings can be arranged for the defined garment-treatment position rather than relying on an overhead air curtain alone.
Joined structural frame
The bridge keeps the side-post relationship defined within one fixed installation.
Selectable start method
Presence detection or a deliberate start action can be chosen to suit the doorway's traffic pattern.
Solutions for Your Application
An open doorway installation works best when the building opening and personnel routine are considered together.
The entrance lacks the depth for a two-door chamber.Locate the air equipment beside the opening and reserve the separate approach and service space required by the fixed portal.
Posts mounted against a lightweight partition work loose or lose alignment.Support and anchor the bridged assembly to a suitable structure rather than relying on the partition skin.
A sensor starts the blower whenever someone passes nearby.Select a deliberate start arrangement or define the presence-sensing zone so unrelated traffic does not initiate treatment.
People walk through too quickly to expose the intended garment surfaces.Set a clear treatment position and timed routine; do not treat an open walking route as proof of a removal result.
Typical Applications
Fixed electronics gowning entrancesOptical-assembly preparation doorwaysCompact food-production changing routesNon-hazardous laboratory support entrances
These examples concern ordinary loose particles on garments. The doorless format does not provide room-pressure separation, hazardous-dust containment, infection control or explosive-atmosphere protection.
Technical Parameters
The following are common selectable references for a fixed, blower-fed personnel doorway portal. Materials, filters and supply variants are configuration choices, not one tested STjh operating duty.
| Portal Construction | Twin side equipment posts joined by an overhead bridge, with open entry and exit |
|---|---|
| Mounting Arrangement | Fixed base plates with floor anchors; supplementary wall bracing optional |
| Casing Material Options | Powder-coated steel; stainless steel 304 casing alternative |
| Blow-Off Air Source | Electric blower supplying filtered air through the side posts |
| Nozzle Configuration | Opposed side outlets; adjustable stainless steel nozzle fittings |
| Filter Package Options | Replaceable prefilter with HEPA final filter; H14 element option |
| Activation Options | Presence-sensor start or manually initiated photoelectric start |
| Operating Control | Adjustable blow-off timer with separate fan start/stop control |
| Single-Phase Supply References | 220–240 V AC, 50/60 Hz; 110–120 V AC supply variant optional |
| Maintenance Arrangement | Removable side service covers with access to filters and air equipment |
| Customization | Available based on the intended application and operating environment. |
Available Options
Made-to-size clear openingPresence sensor or deliberate-start controlOperation status indicationSupplementary wall bracingStainless steel casing selectionIonizing treatment package
The normal arrangement is a floor-fixed open frame with side-mounted filtered-air outlets and accessible air equipment. Opening size, anchoring, filter selection, start sequence and electrical supply can be adapted to the intended doorway. Ionization is an additional package, not a standard ESD or hazardous-area qualification.
Selection and Installation
Measure the useful opening after mounting
Separate the clear personnel opening from the overall frame width, bridge height and service depth. Check the existing door swing, approach space and any wall-mounted equipment. Set the two posts and bridge as one aligned assembly, and choose anchors for the actual supporting floor; lightweight partition panels should not be assumed to support the portal.
Define how users start and complete treatment
A motion sensor can trigger the air stream, but a brief walk-through is not a verified cleaning cycle. Select the sensing position and blowing interval around the intended garment routine. Keep door movement and unrelated traffic outside the start zone, and provide clear stop controls without obstructing the route.
Account for air beyond the frame
A fixed doorless portal exchanges air with its surroundings. Check nearby supply diffusers, extraction points and room pressure relationships before directing the outlets toward personnel. Low-level intake openings do not by themselves establish capture of dislodged dust. Any required collection or extraction must be an identified part of the complete air arrangement; the open portal is not an airlock or a hazardous-powder enclosure.
Leave service space at the doorway
Allow equipment covers and filters to be removed without dismantling the posts or blocking the passage. Match the chosen supply voltage, fan, filters and controls as a single package. For an entry routine that requires a separate enclosed personnel chamber, compare the single-person cleanroom air shower; its doors and chamber are a different equipment format.
Planning a Fixed Doorway Blow-Off Portal specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
