Industrial/Automotive/Aviation Coatings

Overview  Market – Industrial / Aerospace / Body Shop  Distribution – Filtration / Spray Specialist  Industrial User Profile  Overspray Isn’t Dust!  Selection Factors Parts Booth

Typical Industrial Application Finishing processes producing airborne overspray while applying protective and/or decorative coatings to items being manufactured for resale Both are conveyor booths

Market – Industrial / Automotive Aerospace Body Shop - Refinishing Aviation - Refinishing

Industrial Finisher Fabricated Metal Products Appliance & HVAC

Industrial User – Con’t. Agricultural & Off-Road Equip. Marine Recreational Vehicles Wood Furniture & Products

Industrial User – Con’t Metal Panels Die Castings

Paint Booths

Paint Terminology Thermoplastic or Thermoset VOC Solvent Test Dry and Wet Mils Flash Time

Paint Terminology – Con’t Dry Time Cure Time Pot Life 15 Degree rule Wet on Wet

Overspray Properties vary widely, depend upon the coating’s chemistry  Hi-solids, solvent thermosets  Solvent-based, air-dry  Waterborne, thermosets  Waterborne, air-dry  Catalyzed – chemically cured  Specialty – adhesives, gel-coats

Overspray  Is wet on arrival  May or may not dry while in the media  Droplet size ranges from 100   May be electrically charged  Is entrained in a relatively low velocity air stream Pneumatic Controls

Overspray Selection Factors Must give consideration to Overall PROCESS needs: –Spray booth dynamics –Atomization technology –Coatings being sprayed –Disposal constraints –Regulatory constraints Wood Furniture on Conveyor

Overspray Selection Factors Copyright National Air Filtration Association 2006 Rev. 1 Booth Considerations:  Relative location of painter, substrate, & filters  Ave. air velocity (80 – 350 FPM) & direction  Exhaust fan performance curves (determine impact loading has on air movement) Helicopter Fuselage

Atomization Technology determines challenge size MethodDrop Size > 100  < 5  Air (Conventional) High Volume Low Pressure Air Assist Airless Airless Electro-Static Mini- Bell Overspray Selection Factors Mini-Bell Painting Enclosure

Paint Kitchen Copyright National Air Filtration Association 2006 Rev. 1

40 CFR Part 63 subpart HHHHHH All spray booths, preparation stations, and mobile enclosures must be fitted with a type of filter technology that is demonstrated to achieve at least 98- percent capture of paint overspray. The procedure used to demonstrate filter efficiency must be consistent with the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) Method 52.1, “Gravimetric and Dust-Spot Procedures for Testing Air-Cleaning Devices Used in General Ventilation for Removing Particulate Matter, June 4, 1992” (incorporated by reference, see §63.14 of subpart A of this part). The test coating for measuring filter efficiency shall be a high solids bake enamel delivered at a rate of at least 135 grams per minute from a conventional (non-HVLP) air-atomized spray gun operating at 40 pounds per square inch (psi) air pressure; the air flow rate across the filter shall be 150 feet per minute. Owners and operators may use published filter efficiency data provided by filter vendors to demonstrate compliance with this requirement and are not required to perform this measurement. The requirements of this paragraph do not apply to waterwash spray booths that are operated and maintained according to the manufacturer's specifications

Aviation Market Environmental Protection Agency Test Method 319 Aerospace & Aircraft – 319 Chromate Recovery System uses either a two- stage or three- stage paint overspray recovery system.

Disposal Considerations:  Check Coating MFG & MSDS for Hazardous Air Pollutants (HAPS)  Hazardous Materials –Incinerate in cement kiln –Deposit in hazardous landfill  Non-Hazardous Materials –Sanitary landfill –Industrial boiler supplemental fuel  Any additional requirements

Summary Understand the application, type of paint and overspray characteristics Understand the spray booth operational specifications Select your arrestor filter based upon efficiency, airflow and paint holding capacity – use test results Know local, state and federal disposal regulations