Why treat compressed air
Waterborne lacquers are formulated with a precise water-to-solids ratio. Residual moisture in the compressed air alters that ratio at the moment of spraying: thinner film, runs, a patchy matt finish. On oak and chestnut it also activates tannins, with brown stains that appear after drying.
A poorly maintained compressor injects traces of oil into the lacquer. The result is immediate: fish-eye on the primer, poor topcoat adhesion, a piece to scrap. With UV lacquers the problem is even more critical, because oil interferes with curing.
Doors, kitchen panels and wardrobe sides need one continuous pass. A pressure drop halfway leaves a demarcation line visible under raking light: sanding, a blending coat, a new finishing cycle. Wasted time and material.
The Evans system advantage
From the craft workshop to the automated line, Evans sizes the air treatment to your compressor's flow rate and the number of spray stations.
Site survey, sizing, installation and testing included.
Request information →One or two stations, 200–500 l/min compressor. Compact installation, immediate results.
Dedicated booth, medium production, waterborne and solvent-based lacquers. Modular system sized on actual flow rate.
Continuous production, several guns or robots in parallel. Centralized system with flow monitoring and scheduled maintenance.
The Evans system can be interconnected with the finishing line: real-time monitoring of pressure, temperature and dew point, automatic alerts, and data for the Industry 5.0 tax credit.
FAQ
Waterborne lacquers are formulated with precise water-to-solids ratios. Even a little residual moisture in the compressed air alters the dilution ratio at the moment of spraying: the film gets thinner, coverage per coat changes, and the surface can show runs or a patchy matt finish. An Evans system brings the air to the right dew point, so the product leaves the gun exactly as formulated.
Yes, in part. Brownish-yellow stains form when moisture activates the tannins in the wood and they migrate through the wet film. Dry air reduces the amount of water introduced during spraying and slows that migration. For high-tannin woods a blocking primer is still recommended — Evans works on the air, not on the product formulation.
Yes. Evans sizes the treatment to the flow rate and pressure of your existing compressor. Installation takes place downstream of the machine, without replacing it. The work on the air network takes one working day, without stopping production.
Results show from the first working day. The air reaching the gun is already treated by the system: the reduction in defects is immediate, with no running-in period.
Yes. On automated lines the required flow is constant, and any pressure variation turns into thickness defects on every panel. Evans guarantees stable flow even across several guns in parallel, with no drop between the first and last piece of the batch.
Yes. Clean, dry air reduces nozzle wear and prevents scale deposits inside the valves. Gun maintenance becomes predictable: fewer emergency replacements, more production continuity.
