Laboratory Benchtop Fume Hood

Fume hoods are essential safety equipment in laboratories, primarily used for expelling indoor waste gases. They are commonly used in laboratories to vent harmful gases and for cleaning and draining during experiments.
The primary function of a fume hood: The main function of a fume hood is exhaust, particularly in chemical laboratories where harmful gases, odors, and flammable, explosive, or corrosive substances are produced during experiments. To ensure user safety and prevent the spread of contaminants from experiments into the lab, fume hoods are used near the source of pollution. Historically, fume hoods were used sparingly, only in experiments involving harmful and dangerous gases or those generating large amounts of heat. The fume hood primarily serves as an auxiliary function to the laboratory table.
The purpose of using a fume hood is to exhaust harmful gases produced during experiments, thereby protecting the health of the experimenters. This means that the fume hood must offer high safety and operability, which requires it to have the following functions:
Release Function: The system should be equipped with an institution to dilute and discharge harmful gases generated inside the fume hood by absorbing external air from outside the cabinet.
Non-backflow feature: The function should ensure that the airflow generated by the exhaust fan within the fume hood does not reverse and flow back into the room. To achieve this function, it is preferable to connect one fume hood to one exhaust fan with a single pipe. For those that cannot be connected with a single pipe, they should only be connected in the same room on the same floor. The ventilation fan should be installed as close to the end of the pipe (or at the top of the floor) as possible.
Isolation Feature: The fume hood should be equipped with a non-sliding glass window in front to separate the interior and exterior of the fume hood.
Supplementary Feature: Must have a channel or alternative device to draw in air from outside the fume hood when releasing harmful gases.
Controlled airspeed function: An intake speed is required to prevent harmful gases from escaping.
Heat and corrosion resistance: Some fume hoods require the installation of electric furnaces, and some experiments produce a large amount of corrosive acidic and alkaline gases. The countertops, lining panels, side panels, and selected water nozzles, gas nozzles, etc., of the fume hood should all have corrosion resistance.