One of the critical reasons for using a paint booth in the spray painting process is to confine the application of hazardous materials in a controlled and restricted environment. The paint booth will prevent hazardous overspray and solvent fumes from escaping into the workplace and causing fire or explosions when it comes into contact with other applications. By using a paint booth, air and fuel mixture is controlled so that a combustible combination will not occur. Manufacturers usually provide Paint Booth adviceto ensure high quality coating finishes and compliance with local environmental regulations.
The importance of paint booth balance
In order to achieve a high quality coating finish, it is important to ensure that there is control over paint booth balance particularly if there are several paint booth modules. Proper air flow means the amount of air going through the booth module, the direction of airflow and the distribution of air in each module. If there is proper balance, high quality finish will be easily achieved along with the proper application of paint whether it is manually applied or through robotic technology.
The importance of water flow in the water-wash paint booth
In water-wash paint booth systems, paint overspray is removed through the interaction of water and paint. In most systems, the flood sheet as well as the booth scrubbing area is located on the back or under section of the booth. In order to ensure that overspray is removed from air and put into water, there must be proper interaction because overspray will not make its way into the flood sheet and scrubbing area on its own. If overspray is not removed, it can lead to turbulence on the air flow and it can be re-deposited on the newly applied paint which will adversely affect its quality.
How to create a proper balance inside in the paint booth
Balance can be achieved through proper airflow and water flow. One of the ways with which to ensure that there is booth balance is to measure pressure drop across the scrubber. The ratio of liquid flow to air flow will define the efficiency of the scrubber. If the ratio is not within specifications, the efficiency of the scrubber will be compromised and paint quality will suffer as well as the cleanliness of the booth interior. Another method to ensure balance is to measure pressure drop across the scrubber or measure pressure in and out of the booth and compare the difference. In well designed paint booth systems, a manometer is installed to obtain this reading.
It is critical to recognize if there is proper balance in the system. Initially, air flow and water flow will be according to specifications, but without a properly implemented chemical detackification program, deposits will start to buildup. As deposits begin to form, water flow and air flow patterns will be disrupted and will impact on the quality of the spray painting process. The need for maintenance will also increase and it may eventually force unwanted down time.