Compressor for spray booths

A spray gun uses around 350 l/min at about 6 bar; check this on the gun's data sheet. You then need to add the preparation stations running at the same time and keep a margin. For a spray booth on its own, the 7.5 kW 4-in-1 screw compressor is suitable; with several preparation stations, move up to the 11 or 15 kW.

Yes. Compressed air contains water vapour that condenses in the hoses and comes out at the spray gun, causing bubbles and flow defects. A refrigerated dryer fitted after the compressor removes this moisture before the booth. On the 7.5 kW 4-in-1 screw compressor, it is already built in.

Filtration at the compressor outlet, after the dryer, to capture particles and oil aerosols, supplemented by a filter at the painting station, as close as possible to the spray gun. For the most demanding spray guns, follow the paint or gun manufacturer's recommendations on air quality. Remember to replace the cartridges at the specified intervals: a saturated filter no longer filters.

Either the compressor lacks air flow for all the workstations in use, or the air receiver is too small to smooth out demand, or the network is undersized or leaking. A correctly sized air receiver acts as a buffer and keeps the pressure stable during the pass. The air receiver size calculator on our website helps you check this.

It is not recommended once the booth is used regularly. A piston compressor is not made to run continuously; it overheats and sends more oil and moisture into the system, which shows on the finish. A screw compressor combined with a dryer and filtration ensures stable, clean air.

Outside the booth and away from sanding areas, in a ventilated room that supplies cool air with little dust. The dryer and filtration are fitted after the compressor, followed by a filter at the painting station. Avoid long pipe runs through cold areas, where water condenses.