No-Pump Water Wash Booth

No Pump Water Wash Booth

Without benefit of pump or water-spraying manifold, GFS’ NO PUMP SPRAY BOOTH uses the highly effective scrubbing action of a water wash to separate paint particles from exhaust air. By ingenious channeling of the paint-laden exhaust air through a “water tunnel” the NO PUMP system eliminates pumps, piping, filters, manifolds, and nozzles.

How It Works
Paint-laden air is drawn into the washing chamber at high velocity through an opening between the entrainment plate and water surface. The controlled dimension of this opening and the specially designed profile of the entrainment plate force the high velocity air to become severely turbulent, splash up water, and become thoroughly mixed with the overspray.

Next, this rapidly moving mixture of air, paint particles, and water droplets strikes the distribution plate. The mixture is forced to change direction abruptly and to flow upward through a series of baffles. The “mixture” flow changes direction 11 times during its passage through the baffle section. At each change centrifugal force separates air from paint particles and from water droplets. The resulting rain of water, particularly from the lower baffles, serves as an additional water curtain for scrubbing the incoming spray laden air. All of the paint spray that is separated from the air falls back into the water tank.

No-Pump Water Wash Booth

Standard Features:

• 12 and 14 gauge galvanized welded washer assembly.
• Standard panel work area enclosure, 18 gauge galvanized.
• Automatic water level control for maintaining air velocity through entrainment plate gap to within + 1%.
• Low sound, high efficiency mixed flow in line fan.
• Inside-accessible ETL-listed 4-tube light fixtures (includes color corrected T-8 tubes).
• Wash chamber works equally well in both “Crossdraft” and “Downdraft” booth configurations.
• Access door located on back wall for inspection and fan maintenance.
• External float box with level control.

Water Treatment
The water in the tank should be treated with the proper compound to suit the material being sprayed in order that the paint particles be made non-tacky and settle to the bottom of the tank where they agglomerate as a soft, foamy residue. Residue buildup may approach to within 2 inches of the water surface without adversely affecting the “NO PUMP” action in the water tunnel. Residue removal is very infrequent, even in high production painting. Optional automatic centrifugal separators are available.

Precise Water Level Control
The gap between the water surface and entrainment plate is kept with + 1% of its optimum dimension. This is accomplished with a GFS Float Box with Water Level Control Unit. This unit is located outside the booth proper - isolated from contaminating water and spray.

Yet it is directly connected hydraulically to the water tank and senses water level changes immediately and accurately. Its external location gives it maximum accessibility for inspection and calibration.

Easy Assembly
NO PUMP washer is shipped in 3 major all-welded sections for ease of field assembly: Pan, Wash Chamber, and Booth Adapter (Closure Panels).