PP Fume Hood

PP Exhaust Cabinet

Fume hoods are essential safety equipment in laboratories, primarily used for expelling indoor waste gases. They are commonly used laboratory equipment in situations where hazardous gases need to be removed and where cleaning and waste disposal are required during experiments.
The primary function of a fume hood: The main function of a fume hood is exhaust, especially in chemical laboratories where harmful gases, odors, and flammable, explosive, or corrosive substances are produced during experiments. To ensure safety for users and prevent the spread of contaminants from experiments into the lab, fume hoods are used near the source of pollution. In the past, fume hoods were used sparingly, mainly for experiments involving hazardous and dangerous gases or those generating large amounts of heat. Fume hoods served only as auxiliary functions to the experimental table.
The purpose of using a fume hood is to exhaust harmful gases produced during experiments, to protect the health of the experimenters, which means it must have a high level of safety and operability. Therefore, the fume hood should possess the following functions:
Release Function: The system should be equipped with an institution that dilutes harmful gases generated within the fume hood by absorbing external air from outside the cabinet, before discharging them outdoors.
Non-backflow function: The function should ensure that the air flow generated by the exhaust fan in the fume hood does not reverse and flow back into the room. To achieve this function, it is preferable to connect one fume hood with one exhaust fan using 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: A non-sliding glass viewport should be installed in front of the fume hood to separate the interior and exterior of the fume hood.
Supplementary Feature: Should be equipped with a channel or alternative device to draw in air from outside the fume hood when expelling harmful gases.
Control Wind Speed 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 countertop, lining, side panels, and selected water nozzles, gas nozzles, etc., of the fume hood should all have corrosion resistance.