Labconco Protector 3944300 User Manual page 22

Chapter 4: High Performance Features and Safety Precautions
3. Upper Dilution Air Supply provides bypass air from above the
work area. This feature constantly bathes the sash interior with
clean air and reduces powders and chemical fumes along the sash
plane, near the critical breathing zone. Five to seven percent of the
required air volume is introduced through the upper dilution air
supply to ensure maximum containment. Additionally, the upper
dilution air supply reduces stagnant pockets of air in the upper
interior. See Figure 4-4.
4. Visible Clear Rear Baffle directs air streams to the baffle in a
single pass. The baffle and rear panel are manufactured from
framed glass panels to provide maximum visibility on all sides. This
smooth flow minimizes the potential for air to roll forward preventing
contamination from moving toward the sash opening. The
concentrations of materials are largely removed on the first pass
through the contaminated chamber.
5. Side Entry Air Foils allow turbulence-free air to enter the hood
from the sides and allow clean air to sweep the interior walls.
6. Ergonomic Slope provides maximum visibility, and comfort
reduces glare, thereby minimizing operator fatigue.
7. Internal Depth of 23" provides necessary space to support
equipment without extending outside the hood or resting on the
lower air foil.
8. Two Heights available as standard enclosures in 22.75" or 32".
Taller height Demonstration Hoods are typically used for pipet
operations, titration or taller auxiliary equipment.
9. Unique Flush Sash with Spring-Loaded Latch has a wiping seal
to contain contaminants and features a spring-loaded latch for
loading auxiliary equipment. The sash pivots down for normal
operation.
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Figure 4-4
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