Semi Down Draft Type

The Semi-Down Draft (the direction of flow of air is towards the sidewall of spray booth) Paint Spray Booth is suitable for conventional, air-less and electrostatic spray painting and it consists of painting chamber, Inlet Air Filter, Paint Trap Filters, Axial Flow Fan, electric motor, duct and canopy etc. The design of the paint booth will be of down draft type paint booth with disposable paint trap filters on floor. The intake air into the paint booth is filtered by intake filter to avoid foreign particle deposition on the painted surface. The intake air is sucked into the room by the extraction modules located on the side walls.

The paint spray room with down draft is suitable for containment of airless and electrostatic sprays painting mist. The paint mist produced by paint spray operation is carried downwards due to suction effect created by exhaust fan (15). The spray mist with over sprayed paint, but solid and discharge solvent fumes are trapped in disposable paint trap filters under the floor, grating inside the paint spray room due to the negative pressure created by exhaust fan (15).

The paint mist and gasses are sucked from the closed paint spray room, which keeps the atmosphere healthy inside the chamber for the operator. Ventilating air is sucked through the air box (5). The paint spray room is provided with a hinged door (3) that should be fully closed and locked when the paint spray operation is in progress.

During normal operation, dust free air enters the paint room through the top air inlet, filters and then passes through the disposable paint trap filters (10) in the room floor. Paint mist gets trapped on the outside surfaces of the filters and clean air flows through the filters into the pit where it exists through the clean air outlet of an exhaust fan (15) and a chimney canopy.

Salient Features:

Maintains dust level to minimum, prevents spreading of paint and maintains clean air at the operators breathing level.
Collects over sprayed paint, solid and discharge solvent fumes outside the building.
Reduces the fire hazard.