The Laminar Flow Hood is a precision air purification unit designed to provide a localized high-cleanliness environment. It primarily consists of a housing, fan, high-efficiency filter, airflow equalization membrane, and lighting system. The unit can be installed either as a ceiling-mounted or floor-supported configuration and may operate independently or in series to form a continuous strip-shaped clean zone.
Filtered air is blown at a consistent velocity through a HEPA filter, then passes through the airflow equalization membrane to ensure a vertical, unidirectional flow of clean air, maintaining the cleanliness level required in the workspace.
Compared to traditional cleanrooms, the laminar flow hood offers several advantages, including lower capital investment, faster deployment, minimal structural requirements, ease of installation, and energy efficiency. It is widely adopted in industries such as precision machinery, electronics, pharmaceuticals, food processing, and fine chemicals.
In the pharmaceutical sector, laminar flow hoods are widely used and are available in two configurations: built-in fan type and externally connected fan type. Both options can be suspended from the ceiling or supported on a floor-mounted frame. In both configurations, a constant-pressure fan drives the airflow through a HEPA filter and then through the equalization membrane to deliver uniform vertical laminar flow, meeting stringent cleanliness standards for critical processes.
- Compliant with GMP validation requirements
- Grade A (GMP-compliant) clean zone
- Fully constructed from SUS304 stainless steel
- Compatible with both high-airflow fan supply and centralized air-conditioning supply
- Liquid tank seal design ensures zero leakage
The system is operated via a touchscreen control panel, providing real-time display of operational parameters such as fan status, airflow velocity, and pressure differential. When connected to a particle counter, the system also supports real-time monitoring and display of airborne particle concentrations.
| Item |
Details |
| Cleanliness Class |
Grade A |
| Filter Efficiency |
H14 99.995%@MPPS |
| Sealing Type |
Negative Pressure Gel Seal |
| Working Surface Air Velocity |
0.36-0.54 m/s |
| Noise Level |
≤65 dBA(A) |
| Illuminance |
≥350 lux |
| Overall Material |
SUS304 Stainless Steel |
The laminar flow hood is entirely constructed from SUS304 stainless steel and features a liquid tank seal to guarantee airtight performance. It provides vertical unidirectional airflow, with an optional airflow equalization membrane at the air outlet. The airflow velocity ranges from 0.36 to 0.54 m/s, and its performance can be verified using smoke testing.
The unit includes PAO aerosol injection and upstream sampling ports to facilitate on-site filter integrity testing. The side isolation panels are made from either anti-static polycarbonate (PC) or tempered glass, offering visibility and containment.
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