1. The general structure of fume hood is upper and lower type.
2. There are airflow deflector, touchable switch for circuit controls,
power socket, etc. in the upper hood with transparent tempered glass window for
operators to move freely in four directions;
3. The lower hood adopts lab work bench style to conduct various
experiments and is equipped with water faucet if needed. The hood body is
installed under lab bench and is equipped with inside sewers and used for
storing experiment supplies;
4. There is an up-down transparent door (mostly glass) at the
middle front of the hood with the normal opening height of 100-600 mm. The
workbench locates behind the door with wiring of water pipes, sewers, power
supplies, vacuum pumps, gas lines, etc. for required experiments and with a
protective covered lamp upfront;
5. The air is extracted away by the ventilation fan in the upper front of
the
hood, or led to other place through tubes (called full ventilation), or
recycled through filtration (called tubeless ventilation);
6. Normal dimension of the fume hood: Length: 1,200mm,1,500mm, 1,800mm;
width: 850mm; height:2,350mm. For 1-3 operators to use at the same time, the
fume hood is generally installed against the wall.
7. The operator should stand or sit in front of the cabinet, lower the
glass door as much as possible, and conduct the experiment with hands through
under the door. There won’t be lots of harmful gases spill under normal
conditions since the ventilation fan extracts air inward through the opening
door.
