Labconco Protector Echo, Руководство пользователя

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5: Performance Features
Labconco has combined its patented (U.S. Patent No. 6,461,233), containment-
enhancing Protector Hood design with Neutrodine filtration technology to deliver a multi-
use fume hood that requires no ducting. The filtered hood provides safety, energy
savings, and adaptability to ever-changing lab spaces.
The filtered hood is designed to meet the needs of the laboratory chemical hygene plan
with velocities from 60 to 100 feet per minute. The filtered hood has been designed to
effectively contain toxic, noxious, or other harmful materials when properly installed.
The by-pass feature with Neutrodine universal filter technology enables this filtered
hood to maintain safe airflow with excellent filtration efficiency.
Airflow is diverted behind the front panel and under the air foil to help control
fluctuations in face velocity, which occur as the sash is closed. The filtered hood is
SEFA 9 compliant as a DH3 for ductless hoods and ductless enclosures with back-up
safety filters.
Directional Airflow
Directional airflow also plays a key role in filtered hood performance. Air is drawn into
the sash opening of the filtered hood. The angled corner posts, sash handle and front
airfoil are all made to assist the air being pulled away from the worker, into the filtered
hood and through the filters. This movement of air makes it more difficult for aerosols to
escape out of the filtered hoods work area and into the laboratory environment. This
airflow is often calculated and referred to as the Inflow Volume or Average Inflow
Velocity.
HEPA Filters
An optional HEPA filter is available for this filtered hood. HEPA filters are disposable,
dry-type particulate filters. The filter material or media is typically made of borosilicate
microfibers formed into a thin sheet, in a process similar to the production of paper. This
sheet is folded, or pleated to increase its surface area. The pleats are typically held in
place by beads of glue that add rigidity to the media pack. The pack is then set into a
frame, and sealed.