Aerospace Semi-Downdraft Paint Booth
Semi-Downdraft Spray Booths Achieve a High Finish Quality for Aerospace Finishers
Semi-downdraft spray booths combine two airflows: Crossdraft and Downdraft. The semi-downdraft airflow design uses both the principle of a downdraft along with a crossdraft design. The semi-downdraft booth achieves a high finish quality for aerospace finishers. Aerospace semi-downdraft spray booths have a slight downdraft airflow that does not require a pit as compared to a full downdraft booth. These booths can be designed for all size and type of aircraft to achieve your paint spray booth’s efficiency and airflow objectives.
In semi-downdraft spray booths, the supply air enters the top air supply plenum. In this case, the supply filters are located in the ceiling near the front of the booth. Spray Systems uses in their semi-downdraft spray booths a type of diffusion filter media to ensure clean and uniform airflow in the booth. Our filters meet an efficiency rating of 99.0% or greater @ .5 microns, and as a result, helps to keep the paint booth environment free from dust and contamination.
Uniform airflow in a semi-downdraft spray booth moves into the booth from the top front supply plenum and then starts to move towards the back of the booth towards the exhaust plenum. This air continues to move back and around the aircraft being sprayed as it gathers any overspray and moves it away from the aircraft surface; the key for this type of spray booth is to ensure that this airflow will provide a quality paint environment for your finishers.
The exhaust fans within the semi-downdraft spray booth draw the air into the exhaust filters, which are designed to contain the paint overspray. Paint face-loading is eliminated by our special filter design which maximizes filter longevity as these filters capture the paint overspray. To have the best possible airflow, we match the performance of the fan and motor assembly to each booth design which ensures proper airflow. Our exhaust fans operate at noise levels below OSHA limits.
Another critical success factor for designing your perfect semi-downdraft booth, or any booth for that matter, is lighting. Paint finish quality is determined by the part clarity within the work operation of the booth for the painter. Spray Systems first understands your true lighting requirements within the booth. This includes removing dark areas and shadows around aircraft surfaces that will cause quality control concerns. Also, the lighting system within the booth needs to be consistent throughout in order to ensure the paint finisher has the best possible spray environment for the aircraft.
Aircraft spray booths must comply with all agency code requirements when considering the location and operating function of the semi-downdraft spray booth. These include building codes (e.g., mechanical and electrical), fire codes (e.g., NFPA-33, IFC). In addition, your spray booth will require from your city-specific building permits, and at times, certification from a third party like ETL and UL state and local agencies might require permits for air pollution (e.g., VOC emissions) that must be addressed. What is critical to understand is that these aerospace booths are highly regulated, and if not addressed responsibly, can be costly and disruptive if you underestimate these compliance issues. Our semi-downdraft paint booths meet all state and local agency codes.