1. What is a Flow Hood?

A Flow Hood, also known as a fume hood, is a specialized device designed to extract and filter harmful gases, dust particles, and chemical vapors, protecting human health, the working environment, and preventing cross-contamination in laboratories and industrial manufacturing.

2. Working Principle:

A Flow Hood operates by drawing air from the workspace through special filters (HEPA, ULPA, or activated carbon filters) and then releasing clean air back into the environment or outside. This process removes fine dust particles, bacteria, and hazardous chemicals from the air, maintaining a safe and clean working environment.

3. Components:

Main components of a Flow Hood include:

• Cabinet body made of stainless steel or powder-coated steel to resist corrosion.

• Internal structure typically made from Phenolic resin to resist chemical corrosion, or optionally stainless steel (304, 316) or powder-coated steel depending on the chemicals handled.

• Air filters (HEPA, ULPA, activated carbon filters).

• Centrifugal fan that creates high pressure, ensuring stable operation and effectively overcoming resistance from the filters. Standard airflow velocity is 0.4–0.6 m/s.

• Control panel for adjusting airflow velocity, airflow velocity sensors, and audible door alarms.

• Internal fluorescent lighting system.

• Optional UV lamp based on customer requirements.

• Transparent tempered glass or acrylic front panel for easy viewing during operations.

4. Types of Flow Hoods:

Flow Hoods primarily come in two types:

• Vertical Flow Hood

• Horizontal Flow Hood

5. Applications:

Flow Hoods are widely used in:

• Chemical and biological laboratories

• Cleanrooms in pharmaceutical and food industries

• Healthcare facilities and hospitals

• Electronics and semiconductor manufacturing

6. Selection Criteria for Flow Hoods:

Criteria for selecting a Flow Hood include:

• Type of chemicals or dust to be handled

• Air filtration efficiency (HEPA, ULPA, activated carbon filters)

• Size and available installation space

• Material and durability

• Noise level during operation

• Maintenance and cleaning requirements

7. Differences between Flow Hoods, Clean Bench, and Biological Safety Cabinets:

8. Contact Information:

BACH LONG MANUFACTURING TRADING SERVICES COMPANY LIMITED

• Address: 75 Nguyen Hong Street, Ward 1, Go Vap District, Ho Chi Minh City

• Hotline: 093 143 54 54

• Email: sales@congnghelockhi.vn

• Website: www.congnghelockhi.vn