A fume hood offers a safe way to contain and ventilate hazardous fumes. Wet chemical processes often call for the use of a fume hood. Industrial chemical fume hoods are used in a variety of applications, from laboratory chemical research to full-scale manufacturing with wet chemical processes like semiconductor wafer processing, passivation, and part etching.
Typical construction materials for industrial fume hoods depend on the chemical handling properties required for the application, but commonly can include: polypropylene, PVDF, Teflon® / PFA, or ECTFE (HALAR®). Lab fume hoods can be as simple as polypropylene polymer-based tanks with an enclosure to contain and ventilate vapors from the manufacturing or lab process.
Below are a few examples of systems built for customers in various applications and industries like: semiconductor, medical device, and aerospace.
Fume Hood for Wet Chemical Processes
This fume hood is constructed of polypropylene. Air channels built into the enclosure connect to customer-supplied blowers and ventilation to process fumes through facility exhaust.
Best Technology offers a full line of custom polypropylene fume hoods. Our well-ventilated process enclosures protect machine operators and your manufacturing floor from chemical fumes.
Fume Hood for Semiconductor Wafer Chemical Processing
System includes large integrated PVDF tanks with water, air and nitrogen guns and magnehelic pressure gauge for ensuring proper ventilation requirements.
Fume Hood for 3-Stage Chemical Etching Passivation
System includes rear tank venting on two tanks and fresh water rinse in the third tank.
Multistage Wet Process Fume Hood with In-Tank Heat and Circulation Pumps
System includes rear tank venting exhausted from top of system, with integrated rectifiers for electropolishing and pumps for electrolyte circulation. Example process steps for this fume hood include:
- Surface Preparation: Clean and Rinse
- Electropolishing
- Boil-Off Dead Rinse – Removes the drag-out electrolyte from the workpiece and reduces electrolyte waste
- Nitric Acid Neutralization
- Final Rinse.
Chemical Etch Wet Bench / Industrial Fume Hood
This chemical etch wet bench features a counterbalanced window made of clear PVC.
Chemical Fume Hood Options
The etch tank in this fume hood includes an in-tank immersion heater, digital temperature control, circulation pump and low-level sensor. Its companion rinse / neutralizing tank also includes a circulation pump and water inlet.
External controls for this fume hood include digital temperature control, and on/off switches for the in-tank immersion heater, circulation pumps and top-mounted lighting inside the fume hood.
Common Applications for Industrial Fume Hoods
- Medical device stent polishing and deburring of stainless steel and cobalt chrome
- Industrial, aerospace and medical device stainless steel passivation per ASTM A967
- Printed circuit board and silicon semiconductor photoresist stripping using chemistry like ACT970 etch residue remover and others
Common Configurations
Since fume hoods are made from highly customizable materials like polypropylene and PVDF, as well as Teflon® / PFA, and ECTFE (HALAR®), Best Technology is able to easily build a fume hood to fit customer-specific wet chemical process and lab requirements.
Ready to expand your wet chemical processing capabilities? To get your project started, contact an industrial fume hood expert at Best Technology to discuss your project and receive a free quote.