Laura Wahl on tue 7 sep 10
Can someone who has had meaningful experience with spray booths give me=3D2=
0=3D
advise about this subject. I am thinking about purchasing a spray booth, =
=3D
and=3D20
I've found one made by Sugar Creek. The specs. are -- inside dimensions: =
=3D
30"=3D20
(H) x 40" (W) x 20"(D). The 10" exhaust fan pulls overspray and dust onto=
=3D
the=3D20
32" x 20" filter area. Exhaust air delivery is 700 CFM. The price is $44=
=3D
0.00. I=3D20
know one can build a booth for less but if this one is sufficent, it is e=
=3D
asier for=3D20
me to just purchase it. However, if this is not going to do the job suffi=
=3D
ciently=3D20
and I opt to beg my husband to build one for me, what type of fan should =
=3D
I=3D20
buy? Should it be a squirrel cage or an in-line or just a large exhaust f=
=3D
an with=3D20
high cfm -- and how many cfm's do I need? Any useful information is=3D20
appreciated!
David Finkelnburg on wed 8 sep 10
Laura,
The air flow you need depends entirely on how large the opening at the
face of the booth is. The American Conference of Government Industrial
Hygienists, clear back in 1978 in the book "Industrial Ventilation,"
recommended a minimum air flow across the face of a small paint booth. The=
y
suggested a minimum of 150 cubic feet per minute per square foot of booth
opening for an air sprayer (100 cfm/sf for airless). Per your information
the Sugar Creek booth is only 84 cfm/sf. That's probably OK for an airless
sprayer but not for a compressed air sprayer.
A squirrel cage fan is better because it continues to pull air as the
filters plug. A propeller fan tends to lose air flow rapidly as pressure
drop increases.
This is an opinion, but I would never put a fan motor in the air stream
of a spray booth unless it is a fully sealed motor. The question is not if=
,
but when, the motor overheats because of fouling from dust getting through
and around the filters. If it doesn't, that's good, but if it does you may
be buying a new motor. :-( Better is a belt drive with only the fan
wheel or blades in the duct. It's more expensive now, but if you get dust
down the duct you can easily clean the fan. Not so easy to clean a motor
unless it is sealed so well you can wash it off.
Good spraying!
Dave Finkelnburg
http://www.mattanddavesclays.com
-----------------------------
Date: Tue, 7 Sep 2010 22:24:16 -0400
From: Laura Wahl
Subject: Spray Booth Advise Please
Can someone who has had meaningful experience with spray booths give me
advise about this subject. I am thinking about purchasing a spray booth,
and I've found one made by Sugar Creek. The specs. are -- inside
dimensions:30"(H) x 40" (W) x 20"(D). The 10" exhaust fan pulls overspray
and dust onto
the 32" x 20" filter area. Exhaust air delivery is 700 CFM. The price is
$440.00....
Dolita Dohrman on wed 8 sep 10
Laura, I have the smaller one of these, 20" wide. It is the perfect =3D
size for my studio. I bought washable filters from Lowes which I cut in =
=3D
half and they fit perfectly. After doing extensive spraying for my =3D
upcoming show, I have decided that it needs a stronger fan. You can get =
=3D
this booth with a squirrel cage fan from Sugar Creek, but I am not sure =3D
it needs something that large, perhaps a supplemental fan that can fit =3D
into the ductwork. My current fan pulls 400 CFM. You can see my set-up =
=3D
here: =3D
http://louisvilleclay.blogspot.com/2010/07/spray-booth-for-small-studio.ht=
=3D
ml
Hope this helps in some way. If you are near this company, you may be =3D
able to pick up a second...which means that the surface is marred a =3D
little here and there. I got mine for $200.
Dolita
On Sep 7, 2010, at 10:24 PM, Laura Wahl wrote:
> Can someone who has had meaningful experience with spray booths give =3D
me=3D20
> advise about this subject. I am thinking about purchasing a spray =3D
booth, and=3D20
> I've found one made by Sugar Creek. The specs. are -- inside =3D
dimensions: 30"=3D20
> (H) x 40" (W) x 20"(D). The 10" exhaust fan pulls overspray and dust =3D
onto the=3D20
> 32" x 20" filter area. Exhaust air delivery is 700 CFM. The price is =3D
$440.00. I=3D20
> know one can build a booth for less but if this one is sufficent, it =3D
is easier for=3D20
> me to just purchase it. However, if this is not going to do the job =3D
sufficiently=3D20
> and I opt to beg my husband to build one for me, what type of fan =3D
should I=3D20
> buy? Should it be a squirrel cage or an in-line or just a large =3D
exhaust fan with=3D20
> high cfm -- and how many cfm's do I need? Any useful information is=3D20=
=3D
> appreciated!
| |
|
