Tempered Glass Sash Chemical Lab Duct Fume Hood Heat Resistant Fireproof

Acid & Alkali Resistant Heat Resistant Fireproof Chemical Lab Duct Fume Hood Explosion Proof

1. Product Description 

A fume hood (sometimes called a fume cupboard or fume closet) is a type of local ventilation device that is designed to limit exposure to hazardous or toxic fumes, vapors or dusts.

A fume hood is typically a large piece of equipment enclosing five sides of a work area, the bottom of which is most commonly located at a standing work height.

Two main types exist, ducted and recirculating (ductless). The principle is the same for both types: air is drawn in from the front (open) side of the cabinet, and either expelled outside the building or made safe through filtration and fed back into the room. This is used to:

-protect the user from inhaling toxic gases (fume hoods, biosafety cabinets, glove boxes)
-protect the product or experiment (biosafety cabinets, glove boxes)
-protect the environment (recirculating fume hoods, certain biosafety cabinets, and any other type when fitted with appropriate filters in the exhaust airstream)

Secondary functions of these devices may include explosion protection, spill containment, and other functions necessary to the work being done within the device.

2. Product Parameters 

3. More About the Fume Hood 

Avoid Common Fume Hood Mistakes

Fume hoods are very effective safety devices when used correctly. However, no matter how well a fume hood is designed, it won't be effective unless proper laboratory safety measures are taken. Common mistakes when using a fume hood can be detrimental to the user's personal safety and the safety of everyone else around them.

Storing chemicals in the hood

It's okay to have chemicals inside the fume hood when it is in use, but fume hoods are not designed to store chemicals for long periods of time.

Items kept in the hood can interfere with the airflow, which can cause turbulence within the hood and cause contaminants to spill out of the hood into the room. The airflow provided by a fume hood is much higher than needed for the storage of closed containers. Therefore, storing materials in the hood is just a very expensive misuse of equipment.

Chemicals should instead be stored in an approved safety cabinet. Unlike a fume hood, flammable storage cabinets are designed to store chemicals and offer protection from fires occurring outside the hood in the laboratory.

Proper use of a fume hood will ensure the safety of you and those around you. Take proper measures when using a hood and avoid these common mistakes.

4. Detailed Photos

5. Fume Hood Maintenance

• Hoods should be evaluated by the user before each use to ensure adequate face velocities and the absence of excessive turbulence.

• In case of exhaust system failure while using a hood, shut off all services and accessories and lower the sash completely. Leave the area immediately.

• Fume hoods should be certified, at least annually, to ensure they are operating safely. Typical tests include face velocity measurements, smoke tests and tracer gas containment. Tracer gas containment tests are especially crucial, as studies have shown that face velocity is not a good predictor of fume hood leakage.

• Laboratory fume hoods are one of the most important used and abused hazard control devices. We should understand that the combined use of safety glasses, protective gloves, laboratory smocks, good safety practices, and laboratory fume hoods are very important elements in protecting us from a potentially hazardous exposure.

• Laboratory fume hoods only protect users when they are used properly and are working correctly. A fume hood is designed to protect the user and room occupants from exposure to vapors, aerosols, toxic materials, odorous, and other harmful substances. A secondary purpose is to serve as a protective shield when working with potentially explosive or highly reactive materials. This is accomplished by lowering the hood sash.

6. Project Cases