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Paint in spray booth extraction duct

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  • Member since
    November 2019
Paint in spray booth extraction duct
Posted by DaddyJ on Monday, July 12, 2021 12:27 AM

Hi All - I have been using a spraybooth for airbrushing for a year or so. After a heavy spraying session I happened to disconnect the extraction pipe and noticed the red I had been spraying had passed through the filter, into the fan and also part of the extraction pipe.

 

Is this okay? I'm worried that paint getting through the filter and into the fan is bad/dangerous.... but also it might be normal? 

 

Any advice greatly apreciated! Some photos below:

  IMG_1445 by Andrew Jessett, on Flickr" alt="Sp1" />

  • Member since
    November 2019
Posted by DaddyJ on Monday, July 12, 2021 12:30 AM

  IMG_1446 by Andrew Jessett, on Flickr" alt="Sp2" />

  • Member since
    April 2004
Posted by Jon_a_its on Monday, July 12, 2021 2:02 AM

At least this proves it works! Big Smile

It it good that you are using brushless fan motors.

The overspray will only be a problem under certain circumstances:

  • A combination of volume and density of the spray
  • Its' Volitility and Flashpoint.
  • and a Spark or ignition source.

It also depends what you are spraying, any enamel/lacquer/cellulose based paint or thinner will carry more risk.

So Replace Filters more often.

Furnace Filters or cooker hood filters will deal with the bulk of the overspray. I front mine with a 'fleecy' gauze-like filter materiel & have 0-1% deposit on ther fans after 4 years (replace filters as needed).

East Mids Model Club 29th Annual Show 19th MAY 2019

 http://www.eastmidsmodelclub.co.uk/

Don't feed the CM!

 

  • Member since
    November 2019
Posted by DaddyJ on Monday, July 12, 2021 3:17 AM

Thank you for you advice! I  wonder if its my filter. I did put some new ones in that I bought in bulk a few weeks ago. They are spray booth filters but perhaps they are not good enough? I bought a massive roll of it as well! I will monitor and see if it increases... I did spary a lot of red LP Tamiya paint with my 5mm needle. I wonder if it was just so much paint the filter couldn't handle? 

  • Member since
    April 2004
Posted by Jon_a_its on Monday, July 12, 2021 3:40 AM

DaddyJ

Thank you for you advice! I  wonder if its my filter. I did put some new ones in that I bought in bulk a few weeks ago. They are spray booth filters but perhaps they are not good enough? I bought a massive roll of it as well! I will monitor and see if it increases... I did spary a lot of red LP Tamiya paint with my 5mm needle. I wonder if it was just so much paint the filter couldn't handle? 

 



My mum used to spray a cloud of hairspray & walk through it! ConfusedIck!
 
But learning how to get the paint on the model is a skill I hope to crack after 45 years' practice! WhistlingWink
 
You need to ensure the edges are sealed, to make the paint flow go through, not round the filters.  These are High-Volume PC rack fans though, & cope with practically anything.
 
In my home-brew booth, the filter is sealed between the plastic storage box and the fan assembly.
Storage box, then fleece, mesh grille, fan assy, hose box, then dryer hose out the window.
 
In the 'spirit' of Heath Robinson, built out of scrap & Gaffer tape, on purpose... Stick out tongue Cost about USD$2.50 (for filter fleece)
 
 

East Mids Model Club 29th Annual Show 19th MAY 2019

 http://www.eastmidsmodelclub.co.uk/

Don't feed the CM!

 

  • Member since
    June 2021
Posted by rocketman2000 on Monday, July 12, 2021 7:53 AM

I am surprised at the amount of paint residue. I use a furnace filter in my homemade booth and get very little residue in the duct. Is it possible you have a leak in the filter mount?

 

 

Don Stauffer in Minnesota

  • Member since
    November 2018
Posted by oldermodelguy on Monday, July 12, 2021 2:19 PM

It looks to me like the paint is getting around the seal as others mentioned. You can probably also double layer your filter. Really there isn't all that much paint there though, you should have seen the fans in my ancient 1/1 shop and as well as a couple others I worked in, we never blew up. It was just the way of the day back in the early 1970s.

  • Member since
    November 2019
Posted by DaddyJ on Monday, July 12, 2021 2:59 PM
Ha the good old days - thank you for your help that’s good to know. I do double layer but will look to see how I can seal things off a bit better. Hopefully that’s what is happening.
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