Fireproof Chemical Lab Duct Fume Cupboard Alkali Resistant

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

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 

Choosing The Right Liner Material For A Fume Hood

A major consideration for fume hoods is the material of construction, specifically the liner material. There are many liner types that are used for various applications and the liner must be compatible with the chemicals being used. Selecting the right liner will make all the difference and play a major role in the longevity of your fume hood.

Polyvinylchloride (PVC)
Also known as poly or vinyl, this widely produced synthetic plastic polymer is chemically resistant to acids, salts, bases, fats, and alcohols. Typical applications involve acid digestions with chemicals like perchloric, hydrofluoric, sulfuric, and nitric acids. This material is also commonly found in wash down stations. It has moderate resistance to heat and moderate structural strength.

Fiberglass Reinforced Composite Panel
A fiberglass reinforced composite panel liner is the most common fume hood liner. This inexpensive liner material offers high chemical resistance coupled with low smoke and flame toxicity properties. It also provides great temperature control, durability, moisture resistance, and structural strength.

Molded Fiberglass Reinforced Polyester
The molded fiberglass reinforced polyester offers a sleek, one-piece liner. It is corrosion and fire-resistant and makes for easy cleanup. Due to no internal seams, the interior has no cracks where contaminants can collect leading to fewer points of deterioration and longer life expectancy. The high light reflectivity surface is designed to withstand exposure to a wide range of acids, solvents, and alkalis.

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