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Selection standard and placement standard of fume hood

Source: unknown popularity: Time of publication: 14:53, August 27, 2020

There are many sizes and standards on the market laboratory Fume hood The editor will explain some easy to understand methods for you, hoping to help you.
As an important laboratory equipment, fume hood has appropriate performance and size, and can be used for many years. So, how to place the equipment and what are the selection criteria?
The size of the fume hood is divided into 1200 mm / 1500 mm / 1800 mm (the actual size depends on the actual situation). Generally speaking, the distance between other windows should not be within 150 mm.
Large experimental equipment should have space and should not affect the air flow. The front window should be closed as far as possible for easy use.
Resettlement standard:
The fume hood should not be installed in the place where the personnel often go in and out, and the ventilation and lighting are not good, otherwise it will cause an accident harmful to human health. It should not be installed near the entrance, which is easy to block the entrance and affect the door switch; it cannot be placed in the corner of the wall.
It should be installed as close to the window as possible, but avoid blocking the window. If the emission of harmful gas does not meet the standard, the corresponding purification device should also be installed.
Selection criteria:
1. Gas emission function: there should be a mechanism to absorb the harmful gas generated in the fume hood by absorbing the gas outside the hood, and then dilute it and discharge it out of the room.
2. No backflow function: the airflow generated by the fan will not reverse the harmful gas from the inside of the fume hood to the indoor.
3. Isolation function: a non sliding glass window shall be provided in front of the fume hood to isolate the inside and outside of the fume hood.
4. Auxiliary function: when the harmful gas is discharged, there should be a channel or alternative device to inhale air from the outside of the fume hood.
5. Wind speed control function: in order to prevent harmful gas from escaping from the cabinet, the suction speed is required.

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