Maurice Weitman on thu 9 aug 07
Greets, folks, and hello, Gordon,
Gordon's note about his spray booth reminded me that I haven't ever
published pictures of my spray booth, although I've made mention of
it a few times since building it a couple of years back.
So, without further delay, it's (now) the first item on the web page here:
http://www.mopots.com/Blaahhhg/Blaahhhg.html
I'd be happy to answer any questions and provide other pictures as requested.
As you'll see, my design has the fan directly behind the pots... no
ducting, no bends, no obstructions aside from the filter (the degree
of obstruction of which is monitored by a manometer).
I'm intrigued by Gordon's statement about his downdraft design:
"The advantage of this airflow pattern is that the suction is drawing
the spray generally towards the piece being sprayed."
I would think that the pots in my booth get every bit of the spray
aimed at it owing to its position in the direct stream of air with no
baffles. I also believe that the open design of my booth produces
more cfm at the opening, thereby being better for the
potter/sprayer's lungs and associated plumbing.
I've been interested in Michael Wendt's design since it has no
baffles and added the benefit of an open grate for the platform on
which the pot/wheel sat. I wonder, though, whether that design
provides enough clear air to keep the potter's face free of
(over)spray.
Anyhow, th-th-th-that's all for tonight, folks.
Regards,
Maurice
Michael Wendt on fri 10 aug 07
Maurice,
We found that the down draft spray booth with a 3000
cfm fan ducted outside requires no mask if the pot is
in the middle of the grate (requires an equal air
inlet).
I think that a cross face ( side flow ) design would
work as well. The problem with all other designs
is the eddy currents set up in the inlet air by the
human body holding the spray gun that still
result in some spray winding up in your face.
The easiest way to verify air flow is with a set of lit
cigarettes (finally... a fitting use for them).
Position them at key points in the air stream
and position one like you would the spray gun.
The smoke streams give you a visual indication
of any eddy currents and since you
can smell them, if you detect any cigarette smoke
smell, you know some spray will also get to your
nose.
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Ave
Lewiston, ID 83501
USA
208-746-3724
http://www.wendtpottery.com
wendtpot@lewiston.com
Maurice wrote:
I've been interested in Michael Wendt's design since it
has no
baffles and added the benefit of an open grate for the
platform on
which the pot/wheel sat. I wonder, though, whether
that design
provides enough clear air to keep the potter's face
free of
(over)spray.
Anyhow, th-th-th-that's all for tonight, folks.
Regards,
Maurice
James and Sherron Bowen on fri 10 aug 07
"The easiest way to verify air flow is with a set of lit
cigarettes.."
Lit cigarettes! Lead glazes! Ferric chloride! These studios really are
dangerous places.
What's next?
Sort of reminds me of the old Beat Generation poem where the poet goes down
to the drug store and asks for hydrofluoric acid so he can remove the lock
on the gas meter so he can turn on the gas and cook dinner and the
pharmacist says something like. "Hydrofluoric acid? I don't know man.
Bennies is one thing but this acid thing . I don't know."
JB
----- Original Message -----
From: "Michael Wendt"
To:
Sent: Friday, August 10, 2007 7:31 AM
Subject: Re: Speaking of spray booths...
> Maurice,
> We found that the down draft spray booth with a 3000
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