Alkali Resistant Chemical Lab Duct Fume Hood Anti Corrosion

Fireproof Acid & Alkali Resistant Heat Resistant 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 

How To Use A Fume Hood

Fume hoods are designed to keep laboratory professionals safe while working with hazardous materials. They filter the air to prevent the inhalation of toxic particles that can lodge in the lungs and cause serious health implications.

In order for fume hoods to provide protection, users must follow basic safety practices. No matter how well a fume hood is designed, it won't be effective unless proper laboratory safety measures are taken. Check the baffles to make sure they are not obstructed.

If the fume hood has an airflow monitor, check the monitor's status to ensure proper functioning. If you ever suspect changes in airflow while working, take a break to check things out.

Assure all sashes, interior baffles, and panels are in place.

Vertical Rising Sash Hoods: Locate necessary equipment and materials at least 6 inches within the hood and then lower the vertical sash to 18 inches.

Horizontal Sliding Sash Hoods: Locate necessary equipment and materials at least 6 inches within the hood. Check that horizontal sashes are in place. Four-foot hoods need one sash and six-foot hoods need two sashes. Position sliding sash between operator and work in the hood.

Wear appropriate protective gear. You may need additional safety gear depending on what materials you're using. For example, splash goggles, gloves, and a full face shield may be needed for acid testing. In the case of unplanned spills or fires, users will be protected from serious harm if they are wearing the proper safety gear.

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