Laminar Flow Pass Box
A dynamic transfer chamber using H14 HEPA-filtered vertical airflow to protect materials during transfer between clean areas.
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Overview
The Fenggu Laminar Flow Pass Box is a cleanroom auxiliary device for transferring small items between clean zones, or between clean and non-clean zones, while reducing door openings and the associated contamination risk. Its stainless-steel chamber is smooth and easy to clean, with interlocked doors preventing both sides from opening at the same time.
A top-supply, bottom-return airflow pattern passes air through H14 HEPA filtration and distributes it across the chamber. The documented configuration is intended to maintain Grade B cleanliness inside the transfer chamber during operation.
Key Features
- Top-supply, bottom-return laminar airflow pattern
- H14 HEPA final filter with G4 pre-filter
- Interlocked double doors to reduce cross-contamination risk
- Integrated UV germicidal lamp and chamber lighting with separate controls
- Filter differential-pressure display for maintenance monitoring
- Top-access HEPA replacement and lower fan maintenance access
- 304 stainless-steel perforated airflow distribution panel
Technical Parameters
| Chamber cleanliness | Grade B (documented requirement) | Final filtration | H14 HEPA |
|---|---|---|---|
| Pre-filtration | G4 | Air velocity | 0.38–0.57 m/s |
| Air-velocity test position | 150 mm below outlet distribution panel | Airflow pattern | Top supply / bottom return |
| HEPA differential pressure | 0–500 Pa range | Pre-/medium-filter differential pressure | 0–250 Pa range |
| Pressure display accuracy | ±5 Pa | Door interlock | Electronic, built in |
| Construction | Stainless steel | UV lamp | Integrated, separately switched |
Applications
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Tell us the cleanroom grades, opening size and transfer workflow, and our engineers will recommend a suitable configuration.
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