Thursday, 31 January 2008 17:00

SATA Technology for Waterborne

Written by Autobody News staff
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SATA is a one-hundred year old company  and a leading manufacturer of paint spray equipment for the automotive, industrial, and wood industry based in Germany. The company produces a wide variety of products including spray guns, respiratory protection systems, and compressed air filtration units which they distribute in 92 different countries. A philosophy of innovation, quality, and professionalism has made the company a dominant player.


Dan-Am Company which is the exclusive independent distributor of SATA Spray Equipment in USA and Puerto Rico carries on the same philosophy, with customer satisfaction the priority.


As environmental awareness fosters a new technology of paint, notably waterborne, SATA is at the forefront of new technology for spraying waterborne material. With waterborne basecoats becoming law in Europe as of January 2007 and in California and Canada in 2008, SATA has worked closely with the paint companies to develop a complete line of paint spray guns that will spray both waterborne and solvent-based paint.


The first step is to review your current equipment and see what it takes to upgrade instead of buying everything new.

There are a few major areas to focus on to be ready for the switch to waterborne: Air Purity, Corrosion Resistant Equipment, Clean Air Drying Equipment, and Safety.

Air Quality
When switching to waterborne, one of the most important things to look into is the air quality and volume of air. As compressed air flows through the air supply pipes, condensation, scale and oil or oil vapor can be carried along downstream. Even tiny amounts of oil residue are a clear-cut source of coating contamination. That is usually not a problem for sanders and some other air tools, but it can be a problem for breathing air and/or spraying paint material – particularly waterborne.


Waterborne paint is extremely sensitive to oil contamination. Oil contamination introduces oil droplets and oil vapor into the air stream and usually causes very small silicone-like craters (fish eyes) in the paint coating. That results in expensive repair work regardless of whether conventional solvent-based or waterborne material is used.

The two-stage filter system has been standard equipment in many well equipped body shops. However when compressed air is carried downstream typical, two-stage filter units cannot purge oil vapor. Usually oil vapor can be detected by odor if the painter is using a supplied air respirator. When spraying waterborne, adding a (0/464) third-stage activated charcoal filter is ideal. Activated charcoal absorbs oil and organic vapors in compressed air, making it suitable for breathing air (supplies grade D air) and spraying waterborne. This combination makes it a very cost effective way to upgrade your existing filter system.

Corrosion Resistant Equipment
With aluminum spray guns – the most common type – a painter needs to pay particular attention to cleaning the spray gun very thoroughly after use. Water and aluminum together will initiate a very corrosive reaction. If the spray gun is not set up for waterborne or there is residue left in the gun, the result will be corrosion which deteriorates the spray gun over time making it very inefficient and sometimes useless.


SATA’s new spray guns – in particular the SATAjet 3000 HVLP, RP, and the just released SATAjet 100 BF primer gun and the SATAminijet 4 – fluid passages have a special coating to safeguard against internal corrosion.


The gun bodies and all control parts are now plated with a corrosion-resistant, high-gloss chrome finish on the SATAjet 3000 and SATAminijet 4. The new SATAjet 100 BF is supplied with smooth anodized protective finish. Also, a stainless steel paint needle and fluid tip are an integral part of the corrosion resistant assembly. These features ensure superb internal and external corrosion protection and have made the SATAjet(s) one of the longest lasting guns on the market.


Another important part of the spray gun is the gravity cup. Because of the corrosive nature of waterborne when it comes in contact with aluminum, painters should consider ordering spray guns with plastic cups instead. Another cup solution is switching to the new SATA RPS mixing cup. The SATA RPS (rapid preparation system) simplifies your work and saves time and solvent with no cup cleaning. The RPS cup can be used for mixing, painting, refilling and storing.

Dry Waterborne fast and efficiently

The paint booth of today has been designed for solvent base material. It relies on heat to speed up solvent evaporation. On the other hand, waterborne requires high airflow volume to speed water evaporation. Some drying systems now available are being offered for many thousands of dollars. Investments in expensive waterborne drying systems are not necessary. Cost-effective alternatives from SATA are available. Even shops that have outfitted their booths with expensive stationary air drying units are still buying portable units like the SATA dry-jet and stand.

SATA reacted to demand by developing a simple to use, cost effective waterborne drying system named SATA dry-jet. This convenient blowgun can be hand held or mounted on a stand. The special design multiplies ambient air volume by utilizing the venturi injection principle. The SATA dry-jet has an intake filter to prevent paint contamination. It is equipped with a Teflon ball shut-off valve and air consumption is only 8.2 cfm at 29 psi. The SATA dry-jet @ 8.2 cfm uses the least amount of air in the industry.

For drying larger surfaces a special stand is available. Up to 3 SATA dry-jet blowguns can be mounted on the stand and aimed at the surface to be dried which doubles or triples the drying action. Besides increasing the drying area, the stand allows unattended use. This allows the painter to go about doing other tasks until the surface is dry. SATA dry-jet blowguns rotate 360º and may be locked in any position. The stand connects to a standard air hose with a QC and is adjustable from 9.8 to 72.8 inches in height and 3.9 to 29.5 inches in width. Optional height and width extensions are available.

The SATA dry-jet blowgun system is a cost effective means of solving the problem for quick drying of waterborne.


Dan-Am now offers three levels of the dry-jet system: econo, standard and premium models are available today.


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