Laminar Flow Hood Cabinet Guide Drawell
A laminar flow hood or cabinet is a key piece of equipment used in environments requiring ultra-clean conditions. It provides a controlled microbial- and particle-free work area to protect materials, products, and personnel from contamination during sensitive processes.
Parts and Construction
The main components include a HEPA filter, fan, diffuser grid, and work area enclosure. HEPA filters certified to H14 or higher standards purify incoming air through multi-stage filtration. A powerful electric fan pulls air uniformally through the filter pack. Behind the fan is a perforated diffuser grid that spreads air evenly across the work zone. Hoods feature durable powder-coated steel or stainless-steel construction for corrosion resistance, ease of cleaning, and years of service.
Laminar Airflow Principle
Filtered air enters the plenum chamber and passes through the fan and diffuser grid before exiting through small uniform holes. This creates virtually particle-free "laminar flow" - layers of air that move in parallel streams with minimal turbulence. As there is no chaotic mixing, contamination cannot settle or recirculate within the HEPA-sealed boundary.
Types of Laminar Flow Hoods
Horizontal Laminar Flow Hood
Common in electronic cleanrooms, horizontal units discharge air parallel to the work surface for a quiet operation ideal around sensitive components. Models from brands like Drawell offer ergonomic designs optimized for precise assembly work.
Vertical Laminar Flow Cabinet
Vertical flow units such as Drawell's VS-840U discharge downward air currents for staff protection. Often found in pharmaceutical production and medical research, they safely enclose hazardous powders, sprays or vapors within the operator window. Controls allow independent lighting and sterilization.
Areas of Application
Key uses of laminar flow hoods include microbiological labs, IVF clinics, biotech R&D, pharmaceutical processing, medical device manufacturing, semiconductor fabrication, and more. They provide the stringent particle control demanded by regulated industries to effectively isolate samples, cells, and personnel.