Laminar Airflow Manufacturer in Chennai:-
A laminar flow cabinet is a carefully enclosed bench designed to prevent contamination of semiconductor wafers, biological samples, or any particle sensitive materials. Air is drawn through a HEPA filter and blown in a very smooth, laminar flow towards the user. The cabinet is usually made of stainless steel with no gaps or joints where spores might collect.
Laminar Flow Cabinets, or laminar air flow cabinets as they are also known, are normally made of stainless steel with no gaps or joints thereby preventing the build-up of bacteria from collecting anywhere in the working zone.
Laminar Flow Cabinets are also known as clean benches because the air for the working environment is thoroughly cleaned by the precision filtration process.
A laminar flow cabinet is a carefully enclosed bench designed to prevent contamination of semiconductor wafers, biological samples, or any particle sensitive device. Air is drawn through a HEPA filter and blown in a very smooth, laminar flow towards the user. The cabinet is usually made of stainless steel with no gaps or joints where spores might collect.
Such hoods exist in both horizontal and vertical configurations, and there are many different types of cabinets with a variety of airflow patterns and acceptable uses. NSF49 is the commonly accepted regulatory standard for these cabinets.
Laminar flow cabinets may have a UV-C germicidal lamp to sterilize the shell and contents when not in use. (It is important to switch this light off during use, as it will quickly give any exposed skin sunburn and may cause cataracts.)
Laminar Flow Cabinets can be produced as both horizontal and vertical cabinets. There are many different types of cabinets with a variety of airflow patterns for different purposes.
Vertical Laminar Flow Cabinets
Horizontal Laminar Flow Cabinets
Laminar Flow Cabinets and Hoods
Laminar Flow Benches and Booths
All ensure a work space devoid of contaminants and may be tailored to the lab requirements.
Horizontal Laminar Flow Cabinets
Horizontal Laminar Flow Cabinets receive their name due to the direction of air flow which comes from above but then changes direction and is processed across the work in a horizontal direction. The constant flow of filtered air provides material and product protection.
Vertical Laminar Flow Cabinets
Vertical Laminar Flow Cabinets function equally well as horizontal Laminar Flow Cabinets with the laminar air directed vertically downwards onto the working area. The air can leave the working area via holes in the base. Vertical flow cabinets can provide greater operator protection.
How They Work:
The process of laminar air flow can be described as airflow where an entire body of air flows with steady, uniform velocity.
Laminar Flow Cabinets work by the use of in-flow laminar air drawn through one or more HEPA filters, designed to create a particle-free working environment and provide product protection. Air is taken through a filtration system and then exhausted across the work surface as part of the laminar flows process.
Commonly, the filtration system comprises of a pre-filter and a HEPA filter. The Laminar Flow Cabinet is enclosed on the sides and constant positive air pressure is maintained to prevent the intrusion of contaminated room air.
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 least15 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 air flow. Likewise, perform “dirty” operations, like unpackaging samples, as far from the filter as possible.
All hoods operate based on the principle of laminar flow and have the same basic components, including a window sash and protective glass barrier, a non-porous work surface, and an air intake and exhaust. The type of hood used should be chosen based on the experiment. For example, fume hoods typically protect the user, and not the experimental environment. In contrast, laminar flow benches protect the experiment, but not the user, and therefore can but used to keep experimental samples sterile, when they pose no threat. If both the user and the experiment must be protected, a tissue culture hood or biosafety cabinet can be used. Tissue culture hoods maintain sterility of cell lines, while biosafety cabinets provide protection during procedures utilizing infectious agents Once the appropriate unit is chosen for an experiment, the user should wear appropriate protective equipment, and follow all necessary safety procedures.
Laminar Flow Cabinets are suitable for a variety of applications and especially where an individual clean air environment is required for smaller items, e.g. particle sensitive electronic devices.
In the laboratory, Laminar Flow Cabinets are commonly used for specialised work.
Laminar Flow Cabinets can be tailor made to the specific requirements of the laboratory and are also ideal for general lab work, especially in the medical, pharmaceutical, electronic and industrial sectors.
