Biobase Compounding Hood
Available in 8 different models to suit your needs!
Laminar flow hood is used to control airborne contamination of sterile products during their extemporaneous preparation. The direction of airflow may be horizontal or vertical. Horizontal flow hoods are most commonly used, with the more costly vertical flow hoods being reserved for agents that may produce an environmental hazard (e.g. cytotoxic agents, radioactive agents, antimicrobial agents).
- Adjustable airspeed.
- Tabletop type.
- HEPA Filter with efficiency:99.999% at 0.3 μm.
In horizontal laminar airflow hood, room air is drawn into the hood through a prefilter to remove relatively large contaminants such as dust and lint. Then the air is filtered through a high-efficiency particulate air (HEPA) filter removing 99.97% of all particles 0.3 microns or larger. Parallel air streams bathe the work area with a velocity of 80-100 ft/min which is sufficient to provide the area free of particles and microorganisms and prevent room air from entering the work area.
In vertical laminar airflow hood, the filtered air enters at the top of the work area and moves downward. In some models, the air moves down all the way through the work area before it is returned to the room air. In other models, the air moves downward initially but then turns inside the work area and exits from the hood through the opening at the front of the hood.
Some final considerations involving both vertical and horizontal laminar hoods:
1) Neither vertical nor horizontal laminar flow hoods are appropriate in the presence of biohazards. Only an approved containment system, such as a Class II, Type A2 Biosafety Cabinet, should be used in applications requiring Biosafety Level (BSL) 2 or 3 containment.
2) Whichever laminar flow hood design you choose, be sure to run it for at least 15 minutes before you begin critical operation, to allow particles to be purged from the enclosure.
3) Remember the sweeping direction, from clean to dirty, whenever you clean a hood. Wipe down surfaces in smooth, linear motions beginning at the filter face and moving downstream, with the airflow. Likewise, perform “dirty” operations, like unpackaging samples, as far from the filter as possible.