Spray Booth Ventilation

Spray Booth Ventilation.
Aerofoil fans are a popular choice for many spraybooth manufacturers, as they offer high performance at a relatively low cost. However, some budget manufacturers fit aerofoil fans without proper consideration of the engineering issues involved. A number of spraybooths on the market that appear to be a “bargain” prove to be noisy and provide poor airflow and over spray removal, especially against a high back pressures (i.e. long ducting runs or progressively blocked extraction filters). Worse still, many budget price spraybooths are fitted with cheap plastic bladed fans. These tend to lose their aerodynamic shape once exposed to the heat of a number of bake cycles, and after only a short period of use, struggle to maintain any appreciable airflow.

Filtration
Inlet air is filtered to less than 7 microns , providing even air distribution throughout the spraybooth with the minimum of air turbulence, thereby creating the ideal clean air environment for spraying of your components, with excellent over spray removal and minimized risk of contamination.

Unique Mixed-Flow Fans
Airblast often takes the unique step of fitting mixed-flow fans to the spraybooth. We believe this is the perfect spraybooth fan, offering the best of both worlds - being exceptionally quiet, good against high backpressures and generating airflows comparable to aerofoil fans. These fans are incredibly reliable, and, being direct drive, they are virtually maintenance-free, indicative of the quality engineering inherent in a product supplied by Airblast.

Air Handling Plant
Our Spray Booths come with a high efficiency air handling plant, with mixed airflow fans delivering high airflows using maintenance free direct-drive fans, providing robust long life with very low breakout noise.

In spray mode the booth operates in a condition of negative air pressure, whereby the main control panel automatically fine tunes the pressure balance to compensate for the progressive filling up of the filters with paint over spray.

Should the booth slip into a condition of positive balance during spraying an audible alarm will sound and booth shutdown will activate automatically.

Economy Pack
The economy pack utilises a variable speed control system to automatically reduce airflows in the spraybooth when the operator is not spraying, and so maintains the clean environment in the booth while reducing gas and electricity consumption by up to 80%.

High speed running is selected automatically via an airflow detector in the compressed air line, when the operator begins spraying. On completion of spraying it will remain at high speed for a timed period before reverting to economy mode.

Noise Control
The booth provides a comfortable, stress-free working environment by maintaining low noise levels of less than 75dBA.

Extraction
Extracted air is filtered to EPA requirements by duplex filter media, mounted at front of booth either side of main door ensuring an ideal turbulence free air movement along the spraybooth, and extracted via 710mm ducting to atmosphere.

Heater units
Our fully modulating gas-fired duct burner system offers very accurate temperature control in all conditions.

Typical performance data:
Spray cycle maximum air temperature increase over ambient of 28°C controlled to within +/- 1.5°C
Bake cycle maximum air temperature of 100°C. Temperature increase from 20°C to 80°C achieved in 7 minutes on direct gas-fired units (approx 10 minutes for the oil-fired system).