Spray Booth purpose

If you use the proper fan/motor, there is no spark danger.  Many muffin fans use a sparkless motor system.

Don Stauffer

If you use the proper fan/motor, there is no spark danger.  Many muffin fans use a sparkless motor system.

So you are better off making your own? I don't see where brushless motors are so cost prohibitive to put in lower end booths. The commercial booths that are safe are very expensive, but namely bulky bench hogs.

Hi Scott.

Brushless fans of any sort are safe with all solvent spray, as Don said there is no spark, just a magnetic field so no ignition source.

Have a look at my links below.

Mick.

Thanks for the links Mick. I would not have thought of putting a rheostat on the fan, until after I had one up and running.

The units you get down under look like the Masters (Paasche knock off) I see online. yours don't have brushless motors though, or do they?

I just googled this one,

www.paascheairbrush.com/.../HB-16-13

seems identical to the BD-512 and yes the motors are common brushless types, I don't think you will find a house hold fan with brushes anymore.

Mick.

I would have thought that you wouldn't find them with brushes either, but why the warning not to use them with flammable materials? Is it a matter of lower air flow?

I didn't understand the question at first.

But, then I remembered reading an older thread about this.

That warning not to use with flammable materials is on there for insurance purposes, it is only there to attempt to lessen the liability if we make some mistake with their spray booth and cause a fire.

It is as useful as having a warning on a car's brake pedal that says "stepping on this pedal may cause a following car to hit the rear bumper"

There is a perfectly valid way to build a spray booth, even if you use a fan with brushes,,,,,,,,use a squirrel cage fan as found on a car's heater system. Squirrel cage fans have the motor outside of the air path.  Just get a fan from a 1970's or 1980's Ford or Chevy and mount that to your box, and then either plug that into a converter or use the 12 volt system it was designed for. (substitute car makes in other countries)

I wonder how many sales the companies have lost because of that warning?

Rex