According to Liberty an air shower is nothing more than a device meant to limit the contamination brought into a controlled area such as a cleanroom. It works by moving air over the worker at a specific high velocity for a specified period of time. In a properly designed air shower, particles are driven off and away from the body and deposited on the upstream side of the HEPA or ULPA filters.
Air Showers have been used effectively in the cleanroom industry for over thirty-five (35) years and have been instrumental in reducing the level of contamination brought into the cleanroom.
Normally positioned between the cleanroom and the outside environment, an air shower is a chamber equipped with a blower unit, interlocking doors, HEPA filters and prefilters, a recirculating air system and multiple air nozzles. Various size nozzles are arranged on the walls and ceiling in a predetermined pattern for the most effective removal of loose particles, dust, or other particulate matter from the garments.
Filtered air is blown through the nozzles directly against the individual standing within the air shower, creating a flapping and shearing effect designed to remove loose contaminants prior to entering a change room, wash room, anteroom or cleanroom. The air is sucked taken from the chamber, stripped of its contaminants through the filtration system, and recycled back to the air shower to continue the cleaning job.
Today's air shower is equipped with a powerful blower unit, solid state electrical control panels complete with safety monitors and emergency shutdown capabilities that may be activated from both the interior and exterior of the unit. Fluorescent lighting is flush ceiling mounted for maximum brightness.
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