The need for European standard fume hoods has increased recently.
fume hoods
Fume hoods are one of the laboratory equipment ، Sliding door opening The sliding door (also called sash) design of the wind cabinet is usually opened and closed by the operator.
The maximum opening degree of the fume hood sliding door is usually the manufacturer [GG] # 39; but the operating height of most fume hood sliding doors is designed to be 500 mm.
This operating height usually has a limiter to prevent the sliding door from going up or a limit sign affixed to one side of the smoke hood. Another way is to install a sliding door alarm.
When the sliding door exceeds the safe working height, it will alarm automatically. The design air volume of the fume hood under normal operation is the removal area multiplied by the designed surface wind speed
Features Fume hoods
Facial wind speed In many cases, people think that the higher the facial wind speed, the greater the emission of harmful gases in the smoke hood.
This is more likely to be a sign, as there was no test method to ascertain the pollutant leak rate of the fume hood. Yes, but this is actually a wrong approach.
Modern test technology shows that to improve the emission performance of harmful gases or [GG] citation; The work can be done in a laboratory environment by reducing the surface wind speed through miscellaneous operation [GG] citation.
In the design of HVAC, the low wind speed or the variety of deployment operations will reduce the air flow in the laboratory space, and also lead to the reduction of vortex, so the harmful gas emission performance of the fume hood is also improved.
Most parts of the world still have a “normal” fume hood, And China has also chosen this standard. However, in Europe, designers and manufacturers set the wind speed of the fume hood’s running surface to a low 0.3m/s, and this has been widely accepted in most applications, and its safety and efficiency have also been proven. happened.
The leak test under low wind speed has been proven to have good performance in the test laboratory, and its good performance has also been proved in the field laboratory area where some HVAC systems have been debugged.
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