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The Fume hoods are functioning on
very basic principal of containment. It is basically
designed for safety of the personnel working within
the lab by maintaining negative pressure inside the
hood compared to that within the lab. The fume hood
performs effectively & safely at the face velocity
of 100 fpm (or 0.5mtr/sec) at defined sash opening.
The hoods will have double skinned construction to make
it safer. It comprises the electrical components and
utilities as per the need of experiment. It consists
of standard vertically operated counter balanced toughened
glass sash or combination of horizontal & vertical
sash opening. Need based choice between steel and wooden
fume hood is always available. |
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| Bench Mounted Fume Hood : |
Conventional: (Constant Volume):
This is a proven model operated on Constant Volume principle. In this model, majority air enters through the opening of sash. Exhaust volume remains constant. This is very popular and economical model used in general low hazard applications.
Constant Volume By Pass Air:
This type of Fume Hood has the same design as above but will have slots or louvers on the top front panel. Hence, the air bypasses through the slots as the sash is lowered down or closed. There is a sure intake of air either in closed or open sash position. This redistribution of air prevents high velocity streams inside the hood, which may cause turbulence and compromise chemical fume containment. |
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| Auxiliary Air Inlet : |
| This model is the most preferred in the Air-conditioned Lab. This model permits atmospheric air to create an air curtain in front of the sash opening which will prevent conditioned air to be exhausted to much extent. Thus it economizes the energy consumption. |
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| Walk-in Type : |
| The Fume Hood is designed to work with the taller assemblies like 20Ltr, 50Ltr etc. where scientist walks-in to perform bigger assembly applications. The sash in this model operated horizontally. |
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