Fume hoods used in laboratories where intense acids are used must be designed to provide high resistance to such corrosive substances. These hoods must provide long-term durability and effective operation while ensuring the safety of users. Here are the features that fume hoods where intense acids are used must have
Ventilation System
• High-Performance Aspirator:
o It should provide a strong air flow to quickly discharge harmful acid vapors.
• Acid Vapor Resistant Air Ducts:
o Polypropylene or PTFE coated air ducts should be preferred.
• Active Carbon Filter (Optional):
o It can be used to minimize the environmental damage of exhausted gases.
Accessories Resistant to Acid Vapors
• Ventilation Louvers and Fans:
o It should be made of materials resistant to acid vapors (e.g. PVC or PTFE).
• Faucet and Electrical Installation:
o Equipment resistant to corrosive substances and with appropriate insulation should be used.
Work Surface and Countertop
• Material:
o The work surface should be made of epoxy resin, antacid compact laminate, industrial ceramic, or polypropylene. These surfaces are resistant to acid splashes and spills.
• Sloping Surfaces:
o They should be designed so that spilled acids can be collected and easily cleaned.
Safety Features
• Negative Pressure:
o By creating negative pressure inside the fume hood, harmful vapors are prevented from leaking out.
• Transparent Safety Panel:
o There should be a panel made of chemically resistant glass or polycarbonate material that protects laboratory personnel.
• Acid Spill Tray:
o A resistant tray should be placed at the bottom to collect acid leaks.
• Emergency Stop Button (optional):
o There should be a safety button to turn off the electrical or ventilation system.
Compliance with Environmental and Work Safety Regulations
• Ventilation and Gas Evacuation:
o It should be able to safely discharge acid vapors in accordance with international standards (for example, OSHA or EN 14175 standards).
• User Protection:
o Must be designed to minimize worker exposure to chemicals.
