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Personnel and Material Decontamination Equipment
Positive-Pressure Clean Transfer Pass Box
A filtered-supply pass box maintained above adjacent pressure to reduce inward contamination towards sensitive payloads.
- Positive Chamber Bias
- Filtered Supply Air
- Controlled Relief Path
- Timed Clean-Air Purge
Product Introduction
The positive-pressure transfer pass box supplies more filtered air than leaves through its controlled relief path, moving small leakage outwards instead of drawing room particles towards the payload. A fan, diffuser and pressure sensor maintain the selected chamber condition. Receiving-side access can be delayed until a purge and pressure recovery have completed.
Key Features
A defined relief path avoids reliance on door-gap leakage.
A full-width diffuser distributes clean air across trays and containers.
Pressure indication supports operational checks before release.
A timed purge clears loading-side air before clean-side access.
Customer Product Concerns
Payload protection requires outward leakage control without excessive door force or uncontrolled airflow to adjacent rooms.
Room particles enter through minor gasket imperfections.Filtered positive bias drives leakage outward from the protected payload zone.
High pressure strains latches and complicates closing.A controlled relief path limits chamber pressure rise.
A narrow jet bypasses the load and leaves corners stagnant.A broad diffuser spreads supply air over the chamber.
The receiving door opens before loading-side air is displaced.A purge timer and pressure permissive control release.
Typical Applications
Sterile component protectionOptics and sensor transferMicroelectronics materialsMedical-device assembly
Technical Parameters
Representative clean-air construction ranges for a positive-pressure transfer pass box are shown below.
| Core Material | SUS 304 or SUS 316L chamber with variable-speed filtered supply fan, diffuser and relief path |
|---|---|
| Panel Thickness | 80-150 mm supply-plenum and double-wall construction |
| Effective Width | 500-1200 mm clear transfer width |
| Maximum Length | Up to 1500 mm chamber depth |
| Steel Facing Thickness | 1.0-1.5 mm stainless-steel facing |
| Core Density | 35-40 kg/m³ polyurethane insulation around supply and relief plenums |
| Thermal Conductivity | 0.022-0.028 W/(m·K) for polyurethane plenum insulation |
| Surface Finish | Brushed stainless chamber with smooth diffuser and removable payload shelf |
| Joint Type | Sealed cabinet seams with interlocked compression doors, gasketed filter frame and relief connection |
| Customization | Available based on the intended application and operating environment. |
Available Options
Typical +10 to +30 Pa pressure rangeH13 or H14 supply filterConstant-pressure EC fan controlFiltered or ducted relief connection
Planning a Positive-Pressure Clean Transfer Pass Box specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
