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Transfer & Containment FG-PB-LF

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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Fenggu Laminar Flow Pass Box FG-PB-LF
Fenggu Laminar Flow Pass Box FG-PB-LF
Fenggu Laminar Flow Pass Box FG-PB-LF
Fenggu Laminar Flow Pass Box FG-PB-LF
Fenggu Laminar Flow Pass Box FG-PB-LF
Fenggu Laminar Flow Pass Box FG-PB-LF
Fenggu Laminar Flow Pass Box FG-PB-LF
Fenggu Laminar Flow Pass Box FG-PB-LF

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 A 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 cleanlinessGrade A (documented requirement)Final filtrationH14 HEPA
Pre-filtrationG4Air velocity0.36–0.54 m/s
Air-velocity test position150 mm below outlet distribution panelAirflow patternTop supply / bottom return
Differential-pressure monitoringProvided for the installed filtration stages; instrument ranges and accuracy are subject to the approved filter configuration
Door interlockElectronic, built inUV lampIntegrated, separately switched
ConstructionStainless steel, double-wall enclosure with radiused internal corners
Chamber dimensions, door orientation and control configuration are selected for the cleanroom layout and transferred items. Cleanliness performance should be confirmed as part of project qualification.

Applications

Pharmaceutical Cleanrooms Biological Clean Areas Research Laboratories Disease Control Facilities Hospital Clean Areas

Related Products

FG-PB-BIO
Biosafety Pass Box
 FG-PB-VHPA
Automatic-Door VHP Pass Box
 Transfer Systems
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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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Frequently Asked Questions

How is a laminar flow pass box different from a VHP pass box?
A laminar flow pass box uses HEPA-filtered unidirectional airflow (not hydrogen peroxide) to protect items during transfer between clean zones; it suits frequent transfer of small items where full VHP decontamination is not required.
What are its airflow specifications?
Final H14 HEPA with a G4 pre-filter, air velocity 0.36-0.54 m/s (measured 150 mm below the outlet panel), top-supply and bottom-return pattern; differential-pressure monitoring is provided for the installed filtration stages, with instrument ranges and accuracy subject to the approved filter configuration.
What cleanliness does the chamber maintain?
The chamber is designed to a Grade A condition; an integrated UV lamp (separately switched) and interlocked doors are included, and the stainless-steel chamber is smooth and easy to clean.
Are the doors interlocked?
Yes. An electronic door interlock is built in, so both doors cannot be opened at the same time, reducing cross-contamination from door openings.
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