Document: 333D012G
5-18-2007
- 4 -
I – FUNCTION OF THE SterilGARD
®
III Advanceº
SterilGARD
®
III Airflow and Base Features
Room air enters the front access opening of the cabinet at a minimum of 100 FPM [0.508m/sec] then enters the
front work surface perforation. Most of the HEPA filtered down flow air passes through a diffuser but some of the air
is dumped down the back of the viewscreen creating a high velocity air curtain at the front access opening. The HEPA
filtered down flow air in the work area splits at the work surface. Some of the air enters the rear work area perforation
while the remainder of the air enters the front work surface perforation. The air is pulled through the drain pan area,
up the rear and side wall plenums, to the cabinet blower. The air is then pushed into the positive pressure plenum. At
that point most of the air is pushed through the down flow HEPA filter while the remainder is exhausted out the
exhaust HEPA filter and through a perforated filter protector at the top of the cabinet.
[Reference Fig.1]
Fig.1, Airflow Inside Cabinet
EXHAUST
INTAKE
(ROOM AIR)
WORK AREA
DOWN FLOW HEPA
FILTER
POSITIVE PRESSURE
PLENUM
= ROOM AIR
= CONTAMINATED AIR
= HEPA FILTERED AIR
EXHAUST HEPA
FILTER
DRAIN PAN AREA
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