Semi Downdraft Airflow Design

Semi Downdraft Airflow Design


Semi-downdraft Spray Booth combines the two airflows described above (crossdraft and downdraft). This style of booth is associated with higher quality finish requirements. The Semi-downdraft airflow design uses both the principle of a downdraft along with a cross draft design. Air is introduced in a ceiling supply plenum typically located at the front of the booth. The air then moves down and back towards the rear exhaust plenum which is at the opposite end of the booth and located closer to the floor. The air has a “Semi-Downdraft” movement and passes over the part in a downward and then horizontal movement as it approaches the rear exhaust plenum. The exhaust chamber is similar to the cross draft type and incorporates the exhaust filters so the air can be filtered from any paint overspray as it passes through the filters. The clean air is pulled by the exhaust fan through these filters and exhaust duct systems as it is discharged to the atmosphere.

Stage 1

The modified downdraft booth gives qualities of a downdraft without the necessity of a pit. Air is drawn in through the top of the booth. R-1 panels are designed by Viledon for air make-up of paint spray booths. The multiple synthetic layers combine a pre-filter consisting.

Stage 2

After passing through the filters, the air is a particle and dust-free. This creates a virtually clean environment. This clean air passes through the booth resulting in controlled and even airflow.

Stage 3

The air continues down and around the product collecting overspray, moving it away from the product being sprayed down towards the exhaust filters. After reaching the exhaust filters, the airflow has successfully suspended overspray keeping the spray painting environment at optimal performance.

Stage 4

As the air passes through the booth on a modified design, it starts to move to the back of the booth toward the exhaust filters. Air is pulled into the exhaust plenum by the exhaust fan. At this point, the air is suspending the overspray particles keeping the spray booth environment as dust free as possible.

Stage 5

The exhaust filters are designed to hold more paint. They are made from a continuous filament glass fiber with an open weave pattern. This design prevents face-loading as they become saturated. This design forces paint-laden air to change direction many times as it passes through the filter preventing fogging.

Stage 6

This clean air now continues through the exhaust plenum, which is designed to balance airflow throughout the entire booth.

Stage 7

To have the best possible airflow, Spray Systems precisely matches the size of the motor and fan assembly, to each booth. These assemblies operate at noise levels at or below OSHA limits.

See it in action

This all comes together in complete harmony of clean, smooth air flowing over your product for the best possible environment that enables you to give your customers, the best product you can. At the same time knowing you are doing your part in keeping our environment clean and safe.