PP Fume Hood

PP Exhaust Cabinet

Laboratory fume hoods are essential safety equipment, primarily used for exhausting indoor waste gases. They are commonly used laboratory equipment designed for expelling harmful gases and for cleaning and waste disposal 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, 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 that generate 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 expel harmful gases generated during experiments, thus protecting the health of the personnel involved. This necessitates a high level of safety and operability, which in turn requires that the fume hood be equipped with the following functions:
Release Function: The system should be equipped with an institution to dilute and discharge harmful gases generated within the fume hood by absorbing external air from outside the cabinet, before releasing them outdoors.
Non-backflow function: The cabinet should have the function of preventing harmful gases from flowing back into the room from the ventilation cabinet due to the air flow generated by the exhaust fan inside the cabinet. To achieve this function, it is preferable to connect a single ventilation cabinet with a single ventilation 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 window should be installed in front of the fume hood to separate the interior from the exterior of the hood.
Supplementary Feature: Must have a channel or alternative device to draw in air from outside the fume hood when releasing harmful gases.
Controlled 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.