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Steve-atl
 Post subject: explosion proof fan?
PostPosted: Thu Mar 07, 2019 12:20 pm 
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Mahogany
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I want to put an explosion proof fan in my finishing booth, but I do not want to spend a $1000.

I thought I could find a fan that was driven by a pulley. Then I could have the motor outside the booth. Something smaller than 24"x 24."
I did some looking around and did not see anything.

Any ideas?

Thanks
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B. Howard
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 1:17 pm 
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Found my certified explosion proof fan on craigslist. $300 for a fan that cost $1800 new and it wasn't used that hard.

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Steve-atl
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 1:26 pm 
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B. Howard wrote:
Found my certified explosion proof fan on craigslist. $300 for a fan that cost $1800 new and it wasn't used that hard.


Man, that's a good deal; I check craigslist periodically and never find anything. Maybe I will set up an automatic search.

Thanks
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SteveSmith
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 1:50 pm 
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I got a 12" explosion proof fan made by Dayton off of ebay for $250. They're out there.

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Pegasusguitars
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 2:00 pm 
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For many years I used an old restaurant type belt driven squirrel cage fan. That way the motor was external. If there is any kind of metal recycling near you, you might find one. They are often thrown away during demolition. When I moved my shop I bought an official explosion proof fan from Graingers for about $500.00 because it was smaller and easier to install. The squirrel cage worked just fine. Good luck!--Bob

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Rod True
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 2:56 pm 
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If going the route of explosion proofing, don’t forget your lighting and switches...


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WudWerkr
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 3:56 pm 
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Rod True wrote:
If going the route of explosion proofing, don’t forget your lighting and switches...


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More Often the issue than the fan ! [:Y:]

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Barry Daniels
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 4:05 pm 
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If you are going that far get prepared to spend a boat load.
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RusRob
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 4:15 pm 
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Harbor Freight sells this one.


https://www.harborfreight.com/8-inch-portable-ventilator-97762.html

It is NOT UL Rated but the specs are the same as an explosion proof fan ( aluminum fan blades that do not create sparks, and non exposed wires.)

I bought this about 3 years ago and it works quite well. My spray booth is 8' X 8' and this fan was a bit too much for the square foot of my small booth so I put a variable speed controller in and I run it about 1/2 speed which works very well.

From their add:


Quote:
Description
This portable ventilator airs out rooms, circulates air or dries wet areas with a powerful air output of 1590 CFM high, 1380 CFM low. Perfect for drywall, painting, auto body work, welding or any area that needs clean air fast. Features include a two-speed motor, an ergonomic handle for effortless transport and an aluminum blade and steel housing construction for long lasting performance.

Aluminum blade and steel housing construction for long lasting performance
Ergonomic handle for effortless carrying
Four rubber feet for secure footing on any surface
Air flow: 1590 CFM high, 1380 CFM low
Great for dry wall, painting, resurfacing, tile repair, auto body work, welding
Two-speed motor


Maybe not what you are looking for but...

Bob
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Steve-atl
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 4:41 pm 
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RusRob wrote:
Harbor Freight sells this one.


https://www.harborfreight.com/8-inch-portable-ventilator-97762.html

It is NOT UL Rated but the specs are the same as an explosion proof fan ( aluminum fan blades that do not create sparks, and non exposed wires.)

I bought this about 3 years ago and it works quite well. My spray booth is 8' X 8' and this fan was a bit too much for the square foot of my small booth so I put a variable speed controller in and I run it about 1/2 speed which works very well.

From their add:


Quote:
Description
This portable ventilator airs out rooms, circulates air or dries wet areas with a powerful air output of 1590 CFM high, 1380 CFM low. Perfect for drywall, painting, auto body work, welding or any area that needs clean air fast. Features include a two-speed motor, an ergonomic handle for effortless transport and an aluminum blade and steel housing construction for long lasting performance.

Aluminum blade and steel housing construction for long lasting performance
Ergonomic handle for effortless carrying
Four rubber feet for secure footing on any surface
Air flow: 1590 CFM high, 1380 CFM low
Great for dry wall, painting, resurfacing, tile repair, auto body work, welding
Two-speed motor


Maybe not what you are looking for but...

Bob


I have a fan that blows filtered air into the booth. I am looking for a way to vent it out. Would you fill safe having fumes being suck across this motor? There has to be sparks on a running electric motor....right
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surveyor
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 5:34 pm 
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Or you can rebuild/build your own with a detached motor. I looked for months for a "deal" and couldn't find one so I bought a $100 attic fan from Home Depot and rebuilt the guts using the fan blade, made a new shaft with pillow block bearings and new pulleys for the fan shaft and motor. I first tried to use the little motor that came with it but it was too small, so bought a new 1/2hp. All together, I've probably got $250 in it. I also rewired the light switch and plug to mount on the outside of the building. It's best not to turn the light on/off while your spraying or shortly after.

Image
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RusRob
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 5:48 pm 
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Quote:
I have a fan that blows filtered air into the booth. I am looking for a way to vent it out. Would you fill safe having fumes being suck across this motor? There has to be sparks on a running electric motor....right



The motor on this fan is completely sealed so no air gets into the motor itself. I am quite safety conscious so that was a big concern I had. After I bought it I was curious so I pulled it apart to see.

I have a filter box I made to filter the air before it gets to the fan so I am not putting over spray into the outside air.

I also do not keep the fan in place so I can close up the hole when not in use since my shop is humidity controlled I didn't want outside air coming into my shop.

Here are some pictures of my setup.


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These users thanked the author RusRob for the post: Steve-atl (Thu Mar 07, 2019 5:58 pm)
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RusRob
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 6:12 pm 
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I will tell you that I do have to change the filter fairly often but I use the cheapest ones I can find. The filter also helps with my peace of mind since this fan is not certified as "explosion" proof.

But until I can afford a few hundred dollars for a certified fan this works great.

Bob
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Barry Daniels
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 7:38 pm 
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Wow, some risky looking setups here.


These users thanked the author Barry Daniels for the post: Rod True (Thu Mar 07, 2019 9:00 pm)
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Rod True
 Post subject: Re: explosion proof fan?
PostPosted: Thu Mar 07, 2019 9:00 pm 
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I’m always surprised what people are willing to accept as “ok” when setting up for spraying.

Either push the air through the booth so the air flow doesn’t pass by the fan at all (positive air pressure system) or spend the coin on a proper set up.

Guarantee you’re insurance company will be laughing all the way to the bank if you happen to have blown up your house/shop without the proper rated equipment.

One of the biggest reasons I’m not going to be doing my own finish any more. I don’t want the risk involved with putting down a finish I want on my guitars.


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Mike OMelia
 Post subject: Re: explosion proof fan?
PostPosted: Fri Mar 08, 2019 9:40 am 
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https://www.ebay.com/itm/Shutter-Mounte ... Sw0TBcPvAA

No way
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Mike OMelia
 Post subject: Re: explosion proof fan?
PostPosted: Fri Mar 08, 2019 10:26 am 
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Rod True wrote:
I’m always surprised what people are willing to accept as “ok” when setting up for spraying.

Either push the air through the booth so the air flow doesn’t pass by the fan at all (positive air pressure system) or spend the coin on a proper set up.

Guarantee you’re insurance company will be laughing all the way to the bank if you happen to have blown up your house/shop without the proper rated equipment.

One of the biggest reasons I’m not going to be doing my own finish any more. I don’t want the risk involved with putting down a finish I want on my guitars.


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Did u switch to nitro?
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Steve-atl
 Post subject: Re: explosion proof fan?
PostPosted: Fri Mar 08, 2019 11:42 am 
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Mike OMelia wrote:
https://www.ebay.com/itm/Shutter-Mounted-Fan-Exhaust-12-Automatic-Explosion-Proof-Garage-Cool-Air-Blades/401687535237?epid=9023845452&hash=item5d86715e85:g:3msAAOSw0TBcPvAA

No way


That would be perfect
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Barry Daniels
 Post subject: Re: explosion proof fan?
PostPosted: Fri Mar 08, 2019 12:02 pm 
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Yeah, a 1/25 hp motor ought to move a lot of air. Probably one or two cups per hour.
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bcombs510
 Post subject: explosion proof fan?
PostPosted: Fri Mar 08, 2019 7:25 pm 
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Barry Daniels wrote:
Yeah, a 1/25 hp motor ought to move a lot of air. Probably one or two cups per hour.


:D

Math is important. Stay in school kids!!




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Chris Ensor
 Post subject: Re: explosion proof fan?
PostPosted: Sat Mar 09, 2019 9:35 am 
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I use this one:

https://www.homedepot.com/p/iLIVING-260 ... /207174724

It's not advertised as explosion proof but it's a TEFC motor. I also removed all switches and outlets from my booth and built enclosures around the lights.

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Mike OMelia
 Post subject: Re: explosion proof fan?
PostPosted: Sun Mar 10, 2019 3:23 pm 
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Chris Ensor wrote:
I use this one:

https://www.homedepot.com/p/iLIVING-260 ... /207174724

It's not advertised as explosion proof but it's a TEFC motor. I also removed all switches and outlets from my booth and built enclosures around the lights.


Have u sprayed nitro with it ? The one u chose is a larger version of the one on ebay. Same maker
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Rod True
 Post subject: Re: explosion proof fan?
PostPosted: Sun Mar 10, 2019 6:02 pm 
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Mike OMelia wrote:
Rod True wrote:
I’m always surprised what people are willing to accept as “ok” when setting up for spraying.

Either push the air through the booth so the air flow doesn’t pass by the fan at all (positive air pressure system) or spend the coin on a proper set up.

Guarantee you’re insurance company will be laughing all the way to the bank if you happen to have blown up your house/shop without the proper rated equipment.

One of the biggest reasons I’m not going to be doing my own finish any more. I don’t want the risk involved with putting down a finish I want on my guitars.


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Did u switch to nitro?


I’ve sprayed nitro on 7 of the 11 guitars I’ve finished myself.
Personally I like nitro over any of the water based lacquers I tried (3 guitars from em6000)

Even though I was set up with an explosion proof fan and had my switch and lights sealed off, I was always nervous every time I turned the fan on, even a few days after spraying with the off gassing fumes in the booth.

I never did have any issues but the thought was always in the back of my mind... the what if...


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Chris Ensor
 Post subject: Re: explosion proof fan?
PostPosted: Sun Mar 10, 2019 6:07 pm 
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Mike OMelia wrote:
Have u sprayed nitro with it ? The one u chose is a larger version of the one on ebay. Same maker


I’ve done a couple of nitro touch ups but I normally spray poly.

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Clay S.
 Post subject: Re: explosion proof fan?
PostPosted: Sun Mar 10, 2019 7:08 pm 
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No way

If it will move 600 cfm( which is not unreasonable) it might work fine for a small spray booth spraying 1 guitar at a time. A 20 inch box fan will move about 2500 cfm.
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