Aerospace Downdraft Paint Booth
High Finish Quality Spray Booths for Aerospace Manufacturers
Aerospace manufacturers and sub-contractors require high finishes from their paint spray booths – the Spray Systems’ Downdraft Spray Booth achieves that goal. Besides achieving high finish requirements, these booths can be engineered for a particular aircraft, size and type to optimize efficiency and air flow.
By definition, “downdraft” refers to air travel and its direction within the booth. By design, a downward flow will be maintained starting at the supply filters in the ceiling of the booth down to the floor level. Any overspray that results from the spray activities inside the booth are drawn to the floor grating over a pit trenched in the floor. This overspray proceeds through exhaust filters located beneath the grating, itself. As it passes through, the overspray is removed from the air stream as is drawn to the exhaust fan and ductwork system – the result is clean air discharging into the atmosphere.
More specifically, the supply air enters the top air supply plenum where the supply filters are located in the ceiling. The supply filters we use are thermally bonded and treated with a special adhesive tackifier to capture dust and dirt. All Spray Systems’ filters have an efficiency rating of over 99%, at 0.5 microns. The filters also act as diffusion media to distribute the air uniformly over the booth ceiling. This keeps the air constant and uniform over the aircraft.
The clean air created from the filtered supply plenum provides an environment for the optimum finish. Uniform air flow along with gravity moves the overspray to the floor/grating of the booth.
The air continues to move down and around the aircraft as it collects overspray and moves away from the aircraft surfaces. The final path of the air continues into the exhaust filters. These filters are specially designed to capture the paint overspray and to prevent face-loading, as they become filled with paint particles and contaminants. This ensures that the air flow stays constant and uniform through the spray booth. This is why downdraft paint spray booths are so efficient. They provide the best possible paint environment for aircrafts and related parts.
A typical aircraft spray booth installation is much like a mini-building construction project. Not only is there the mechanical installation of the booth with airflow considerations, but also the building interface and utility connections to the booth. Aircraft spray booths require utility connections, such as wet sprinkler lines, electrical connection to building electrical sources and compressed air from a compressed air source. In addition to utility connections from building sources to the booth, there are mechanical interfaces with the building like roof openings, roof curbs, grounding requirements – and sometimes building space and distance minimums depending on booth location.
All of these utility and building interface necessities will require building permits from the local City or municipality, and sometimes third party certification such as U.L or ETL approvals. In addition, there are local and State air pollution permits for the VOC emissions that must be considered. As you can see, these aircraft booths are highly regulated and the process is unavoidable and require compliance. It can be very costly and disruptive to underestimate these compliances in the final spray booth solution.
Equally as important, employee safety is addressed by OSHA under section CFR-1910. These OSHA requirements not only cover personnel and operator safety but also address special guidelines for the operator which directly affect the design of the spray booth. Items such as emergency egress, proper airflow, storage of paint, minimum clearances are all items addressed in this code. All Spray Systems Downdraft Spray Booths meet all federal and local agency codes.