Jennifer Boyer on fri 16 oct 98
Well,
I searched Clayart looking for an answer to this, and checked out the CM
articles about spray booths, but to no avail:
When building your own low cost spray booth, how big should the fan be?
Any suggestions as to a specific kind? We need to put together several
for our Steven Hill workshop at North Country Studio Conference in
February. I've found the article in CM to be helpful: seems to point
towards putting a baffle in front of the fan (blade, not squirrel
cage). If anyone is a spray booth builder-extraordinaire please let me
know so I can get some pointers....this has to be a bare bones kind of
thing. TIA Also if you know of a thread from clayart about this with an
exotic heading that I didn't run across, let me know....
Take Care
Jennifer
--
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jennifer Boyer jboyer@plainfield.bypass.com
Thistle Hill Pottery
Vermont USA
http://www.vermontcrafts.com/members/JenniBoy892.html
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Adam Lossing on sat 17 oct 98
I have built a booth using an exhaust fan salvaged out of an old building.
It's mounted horizontally 18" off the floor with a rack holding a furnace
filter above it. Build the booth walls up as tall as you want and install
a light on the top.The work area is framed in 3" above the filter rack so
that it can be removed and would ideally be made out of exterior grade
plywood finished with arbourite. Leave an opening of 3" across the back
wall. The glaze will build up on the back wall and not your filter. The
over spray is heavy and wants to drop so why not pull it down rather than
horizontal like most designs. Total cost was less than $100 CDN.
On Fri, 16 Oct 1998, Jennifer Boyer wrote:
> ----------------------------Original message----------------------------
> Well,
> I searched Clayart looking for an answer to this, and checked out the CM
> articles about spray booths, but to no avail:
> When building your own low cost spray booth, how big should the fan be?
> Any suggestions as to a specific kind? We need to put together several
> for our Steven Hill workshop at North Country Studio Conference in
> February. I've found the article in CM to be helpful: seems to point
> towards putting a baffle in front of the fan (blade, not squirrel
> cage). If anyone is a spray booth builder-extraordinaire please let me
> know so I can get some pointers....this has to be a bare bones kind of
> thing. TIA Also if you know of a thread from clayart about this with an
> exotic heading that I didn't run across, let me know....
> Take Care
> Jennifer
> --
> ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
> Jennifer Boyer jboyer@plainfield.bypass.com
> Thistle Hill Pottery
> Vermont USA
> http://www.vermontcrafts.com/members/JenniBoy892.html
> ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
>
------------------------------------------------------------------------------
Adam Lossing Fine Arts Program Assistant (604) 599-2265 fax 599-2279
****** e-mail:adam@kwantlen.bc.ca*******
Kwantlen University College 12666-72nd Ave Surrey,B.C. V3W 2M8
------------------------------------------------------------------------------
Don Prey on sun 18 oct 98
In a message dated 10/16/98 6:30:48 AM, you wrote:
<>
Jennifer, as a point of reference, the Amaco spray booth sold by many
suppliers has a fan with "exhaust air delivery" of 650 cubic feet per minute.
That booth has a work area of 20 x 20 x20 inches.
Don Prey in Oregon
Jonathan Kaplan on sun 18 oct 98
>----------------------------Original message----------------------------
>I have built a booth using an exhaust fan salvaged out of an old building.
>It's mounted horizontally 18" off the floor with a rack holding a furnace
>filter above it. Build the booth walls up as tall as you want and install
>a light on the top.The work area is framed in 3" above the filter rack so
>that it can be removed and would ideally be made out of exterior grade
>plywood finished with arbourite. Leave an opening of 3" across the back
>wall. The glaze will build up on the back wall and not your filter. The
>over spray is heavy and wants to drop so why not pull it down rather than
>horizontal like most designs. Total cost was less than $100 CDN.
Also, if you have the bucks and want to do a first class job, use a tube
axial fan in the exhaust line. We use a dry Paasche booth, and use
relaceable filter media that we purchase in big rolls and change
frequently. The axial fan is mounted behind the filter media and creates a
suitable draft. The only downside is that it is, unfortuanately, loud. So
we do wear ear protection as well as a respirator for protect against any
overshot.
BTW, there was a great article in CM some year's back by my colleague Bill
Campbell describing his wet spray booth. I hav seen his spray booth and it
is "da bomb!!"
Jonathan
Jonathan Kaplan, president
Ceramic Design Group LTD/Production Services
PO Box 775112
Steamboat Springs CO 80477
plant location
1280 13th Street Unit 13
Steamboat Springs CO 80487
(970) 879-9139 voice and fax
jonathan@csn.net
http://www.sni.net/ceramicdesign/
Andrew Buck on mon 19 oct 98
Hi all,
Don is correct. The size of the fan is not as important as the amount of
air that it moves. Fans of the same size are sometimes designed to move
a lot of air at low pressures and some are designed to move less air at
higher pressures. Look for the cubic feet per minute numbers and then
take into account how much back pressure there will be. (ie. if you have
any ducting on the outlet of the spray booth or not)
You can also figure the volume of space that is inside your spray booth
and how often you wish the total air in the booth replaced. If you have a
10 cubic foot spray booth and you want the air exchanged at 10 times per
minute, you need a fan that blows at 100 cu. ft. per min. Don's example
below is 4.63 cu. ft. of volume with the fan moving air at 650 cu. ft per
min. So the total air volume would be exhausted up to 140 times per min.
depending on any flow restrictions on exhaust. 8^O Happy computing.
Andy Buck
Raincreek Pottery
Port Orchard, Washington
On Sun, 18 Oct 1998, Don Prey wrote:
> ----------------------------Original message----------------------------
>
> In a message dated 10/16/98 6:30:48 AM, you wrote:
>
> <>
>
> Jennifer, as a point of reference, the Amaco spray booth sold by many
> suppliers has a fan with "exhaust air delivery" of 650 cubic feet per minute.
> That booth has a work area of 20 x 20 x20 inches.
> Don Prey in Oregon
>
Joseph Herbert on tue 20 oct 98
Using Don Prey's Amoco numbers, the air movement at the front of the booth,
not allowing for losses, is about 4 feet per second. This is also about 2.5
air changes in the booth per second -- although I don't know how important
that is. The good velocity into the booth seems the key, if you don't have
any dead air spots designed into the enclosure. There are probably ducting
losses and other losses -- dirt on the blades, etc., so the 4 feet per second
across the booth face is probably good to shoot for.
Joseph Herbert
JJHerb@aol.com
Jennifer Boyer on thu 22 oct 98
Hi All,
Just wanted to thank everyone for all the excellent info on my spray booth
question. I might just build one for myself after the North Country Conference
is over! No use letting all this new knowledge go to waste.....
Jennifer in VT where the leaves are all on the ground now.
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jennifer Boyer jboyer@plainfield.bypass.com
Thistle Hill Pottery
Vermont USA
http://www.vermontcrafts.com/members/JenniBoy892.html
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
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