Good Afternoon, Crew! Well, it's getting to be time to make a new spray booth. I scrapped the old one that used a Grainger's blower motor, but I have no idea where it is. What blower motor CFM would you guys suggest? Thanks!
Russ
Modeling the early '50s Erie in Paterson, NJ. Here's the link to my railroad postcard collection: https://railroadpostcards.blogspot.com/
While I don't have a spray booth right now, (I want one but don't have room for it) here's a good thread on building one: http://cs.trains.com/mrr/f/88/t/278567.aspx
I worked with our tenant on a spray booth. He makes and paints war gaming stuff. He bought a commercial enclosure, pretty standard sized, maybe two feet wide by 18" tall. At my suggestion he used a bilge pump. These are used in confined spaces on boats where gas and other volatile fumes might be present, so are rated to run and not blow things up.
I think this is what he used:
https://www.amazon.com/Johnson-Pump-54154-Remote-Radial/dp/B002IVENNE/ref=sr_1_23?ie=UTF8&qid=1545273516&sr=8-23&keywords=bilge+fan
It's 112 CFM, which is probably overkill, so if whatever fan you do use is similar CFM, it should work for you.
Mike Lehman
Urbana, IL
Mine has a 10" panel exhaust fan which my old company donated to me
It's about 500 CFM. The filters in front of it cut down a lot of that. It vents directly into an attic crawl space.
A search on the forum reveals recommendations from 50 CFM to 500 CFM, so, take your pick!! I really think that around 250-300 would be great. Filters, elbows, exhaust piping all reduce the available air flow.
Cid (Memphis, Tennessee)
I haven't a clue as to the CFM of my spraybooth fan, but it works well, provided that there's an inlet for make-up air into the paint room.
This photo shows it when it was still in a basement room...
...I've since moved it to a separate room within my garage, which is located about 100' behind the house. This allows me to paint at any time without the noise bothering anyone.The exaust fan is from an old air-hockey game, and fits in the metal ductwork plenum atop the homemade spray booth. I've replaced the original flexible plastic ductwork shown with metal, as I don't need mice and squirrels chewing their way in for a paint job.
This spraybooth has been in use for almost 50 years, trouble free, and that includes several years of commercial model-painting.
Wayne
For fume hoods at research labs the face velocity is typically maintained at 100 feet per minute. Based on that:
CFM = face velocity x area
if your hood opening is 24 x 18 (2' x 1.5') then
CFM = 100 x 2 x 1.5 = 300 CFM
use the above formula and adjust for your face area. A thin filter probably has a pressure drop around .25" when somewhat dirty with paint. The duct pressure drop if short and say 1 elbow maybe adds another .25". So if you can find fan data that includes the CFM and pressure, using the above example, pick a fan that moves 300 CFM while developing at least 0.5" pressure. If, say your CFM works out to be 400 CFM, find a fan that produces 400 CFM again at 0.5" pressure.
The above should provide a reasonable way to select a fan.
Erie1951 I scrapped the old one that used a Grainger's blower motor, but I have no idea where it is.
I've got a pretty good-sized Dayton (Grainger) blower you're welcome to have. If you can use it I'll post some photos of it.
How close are you to Chardon (Geauga Co.)? I have a sister-in-law in Kent and I could give it to her for you to pick up. Otherwise, UPS?
[edit]
Correction, the motor is Dayton (looks brand-new) the blower is a Peerless. They're still in business!
https://peerlessblowers.com/company/
Peerless_D8C-elev by Edmund, on Flickr
It's a hefty piece of machinery.
Peerless_D8C by Edmund, on Flickr
Peerless_D8C_tag by Edmund, on Flickr
Made in Warren, Ohio.
Cheers, Ed
I have a Dayton blower that I got from Granger. I do not remember the CFM, but it depends on the size of your spray both opening.
I built my spray booth in the late 1980s, and the blower is working fine to this day. All I do is once or twice a year use a screwdriver to lightly scrape the paint dust buildup from the fan blades.
George In Midcoast Maine, 'bout halfway up the Rockland branch
gmpullmanI've got a pretty good-sized Dayton (Grainger) blower you're welcome to have.
Thanks for the offer, Ed! I'm a bit tight on space, so I think it's too large for me.
I think you meant 'bilge fan' not 'bilge pump'. 2 very different applications! However if your basement floods a bilge pump might come in handy. :)
Modeling an HO gauge freelance version of the Union Pacific Oregon Short Line and the Utah Railway around 1957 in a world where Pirates from the Great Salt Lake founded Ogden, UT.
- Photo album of layout construction -
Wolf359While I don't have a spray booth right now, (I want one but don't have room for it) here's a good thread on building one: http://cs.trains.com/mrr/f/88/t/278567.aspx
http://cs.trains.com/mrr/f/88/t/278567.aspx
Thanks for linking to my thread, and the compliment.
It has been a few months since I finished that project, and it is a 100% success.
That blower motor I used is perfect, but it needs to be hard wired, so keep that in consideration.
-Kevin
Living the dream.