Laboratory Fume Exhaust Hoods:
Dimensional chart for Fume Exhaust Hoods | ||||||||||||||||||||||||||||||
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Laboratory Fume Exhaust Hoods:
Laboratory fume hoods are moderately covered workspaces that are exhausted to the outer side. The prime objective of laboratory fume hoods is to keep poisonous or irksome vapors out of the general laboratory working area. Another purpose is to serve as a protective layer between the worker and the equipment being used when there is the possibility of an explosive reaction, or to protect the specimen. Laboratory hoods are comprised of the hood itself and a sash, which is the front panel of the fume hood that can be opened and closed to maximize access and minimize airflow. The efficiency of a laboratory hood is measured by its hood face velocity and required air flow. Hood face velocity is a measurement of air flow speed across the imaginary plane running between the bottom of the sash to the work surface. Generally measured in feet per minute (fpm), the greater the hood face velocity, the more quickly toxins and other vapors can be flushed from the system. Required airflow is related to hood face velocity in that it is a measurement of the amount of air flow required to achieve a laminar flow velocity of 100 feet per minute. The Fume Cupboard is closed on three sides and front side provided with 5 mm thick polycarbonate sliding door. The fume chamber is provided with a centrifugal blower mounted on top of the Hood, coupled directly with a suitable motor for sucking the fumes from the hood and forcing it to go out to the atmosphere through the duct. The blower and casing will be made of mild steel with polyurethane paint coated / FRP finish. |
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