Maurice Weitman on wed 14 dec 05
Hi, folks,
I'm near the end of my studio rebuild, and I'd like to pull on your
coats about a couple of things.
Tonight's issue is the spray booth I'm cobbling together.
Four months ago, Gordon Ward wrote:
>Grainger's has what is called a "radial wheel blower". It looks
>similar to a squirrel cage blower, but is designed specifically for a
>dusty environment. The wheel is self cleaning. Paul Geil (Geil Kilns)
>told me he uses one and it works extremely well, much better than the
>junk found on some high end spray booths. (I won't mention names.)
I've been considering Grainger's 7C553, a radial blade direct drive
blower, as well as the Grainger propeller-type exhaust fan, which I'm
leaning towards selecting, despite its nasty habit of CFM dropping
quickly with filter cloggage.
I'll be using HVLP sprayers, and am prepared to keep the filters
clean, so how important is this trait to me?
Besides its lower price ($177 vs. $242), I'm drawn, so to speak, to
the fan's other advantages. For units having comparable CFM, the fan:
- is about half the weight,
- is about half the front-to-back depth,
- is easier to mount to the back of the booth,
- produces about the same amount of noise,
- can use a ($20) variable speed control for those times
when I just want some air movement in the studio,
- uses less than 1/3 the electricity,
- doesn't require shielding from weather.
So... whataya think? If the only real disadvantage is that CFM will
drop as the filter clogs, is there really a reason to get a
centrifugal/radial wheel/squirrel cage blower?
Thanks.
Regards,
Maurice, still here in Fairfax, California, staying awake until
midnight while the 2005 Cream Albert Hall concert is winding down
(Ginger Baker is 66 and still the best drummer alive), counting the
nights to our 20th annual latkefest, and enjoying these last days
before the Sun begins inching its way to a higher place in the sky to
more generously enlighten us for another year.
Speaking of enlightenment, and despite the recent regrettable rancor
in clayarttown, I've really been enjoying some of the recent threads
(and happily ignoring others). More about that later. Time for
sleep.
Michael Wendt on thu 15 dec 05
Maurice,
When you were here for Craig Martell's workshop, you remember the cobbled
together fan we built for his demo?
The real spray booth we use was too small to permit all the workshop
attendees to see him in action.
It is a tube-axial fan I built from the fan blade of a car in 1981.
The main advantage to blade fans is high volume air movement. This one is
rated at 3000 cfm with 1/2 hp.
In contrast, the radial blade fan we use for the dust collector is 2000 cfm
at 5 hp 3 phase.
The noise levels with radial designs are also quite loud.
One added point, our spray booth is in the alcove between the studio and the
kiln room and is a down-draft style so that there is no tendency to back
eddy into your face. I've added a photo at the top of my clayart page
http://www.wendtpottery.com/clayart.htm if you want to take a look.
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Ave
Lewiston, Idaho 83501
USA
wendtpot@lewiston.com
www.wendtpottery.com
Maurice wrote:
Tonight's issue is the spray booth I'm cobbling together.
Four months ago, Gordon Ward wrote:
>Grainger's has what is called a "radial wheel blower". It looks
>similar to a squirrel cage blower, but is designed specifically for a
>dusty environment. The wheel is self cleaning. Paul Geil (Geil Kilns)
>told me he uses one and it works extremely well, much better than the
>junk found on some high end spray booths. (I won't mention names.)
I've been considering Grainger's 7C553, a radial blade direct drive
blower, as well as the Grainger propeller-type exhaust fan, which I'm
leaning towards selecting, despite its nasty habit of CFM dropping
quickly with filter cloggage
Marcia Selsor on thu 15 dec 05
Maurice,
My friend in Italy built a water cleaning wall pre exhaust. Somehow
he reclaims the glazes. The water keeps the dust down.
Can't tell you much more than that.
Marcia in Montana anxiously awaiting the sun's returning to longer
days. Still have soem shorter days to come..one week or so.
And d*** missed the concert! Saw the Cream in "67'
On Dec 15, 2005, at 12:59 AM, Maurice Weitman wrote:
> Hi, folks,
>
> I'm near the end of my studio rebuild, and I'd like to pull on your
> coats about a couple of things.
>
> Tonight's issue is the spray booth I'm cobbling together.
>
> Four months ago, Gordon Ward wrote:
>> Grainger's has what is called a "radial wheel blower". It looks
>> similar to a squirrel cage blower, but is designed specifically for a
>> dusty environment. The wheel is self cleaning. Paul Geil (Geil
>> Kilns)
>> told me he uses one and it works extremely well, much better than the
>> junk found on some high end spray booths. (I won't mention names.)
>
> I've been considering Grainger's 7C553, a radial blade direct drive
> blower, as well as the Grainger propeller-type exhaust fan, which I'm
> leaning towards selecting, despite its nasty habit of CFM dropping
> quickly with filter cloggage.
>
> I'll be using HVLP sprayers, and am prepared to keep the filters
> clean, so how important is this trait to me?
>
> Besides its lower price ($177 vs. $242), I'm drawn, so to speak, to
> the fan's other advantages. For units having comparable CFM, the fan:
> - is about half the weight,
> - is about half the front-to-back depth,
> - is easier to mount to the back of the booth,
> - produces about the same amount of noise,
> - can use a ($20) variable speed control for those times
> when I just want some air movement in the studio,
> - uses less than 1/3 the electricity,
> - doesn't require shielding from weather.
>
> So... whataya think? If the only real disadvantage is that CFM will
> drop as the filter clogs, is there really a reason to get a
> centrifugal/radial wheel/squirrel cage blower?
>
> Thanks.
>
> Regards,
> Maurice, still here in Fairfax, California, staying awake until
> midnight while the 2005 Cream Albert Hall concert is winding down
> (Ginger Baker is 66 and still the best drummer alive), counting the
> nights to our 20th annual latkefest, and enjoying these last days
> before the Sun begins inching its way to a higher place in the sky to
> more generously enlighten us for another year.
>
> Speaking of enlightenment, and despite the recent regrettable rancor
> in clayarttown, I've really been enjoying some of the recent threads
> (and happily ignoring others). More about that later. Time for
> sleep.
>
> ______________________________________________________________________
> ________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
>
steve graber on thu 15 dec 05
good points to bring up - i'll throw something into the mix.
i THINK the squirrel cage motor blowers provide a more uniform draw of air where a basic fan draws air in from the edges more then the mid section. this means the spray booth might not draw as fast as expected in all corners of the spray booth.
but i don't know for sure...
see ya
steve
Maurice Weitman wrote: Hi, folks,
I'm near the end of my studio rebuild, and I'd like to pull on your
coats about a couple of things.
Tonight's issue is the spray booth I'm cobbling together.
Four months ago, Gordon Ward wrote:
>Grainger's has what is called a "radial wheel blower". It looks
>similar to a squirrel cage blower, but is designed specifically for a
>dusty environment. The wheel is self cleaning. Paul Geil (Geil Kilns)
>told me he uses one and it works extremely well, much better than the
>junk found on some high end spray booths. (I won't mention names.)
I've been considering Grainger's 7C553, a radial blade direct drive
blower, as well as the Grainger propeller-type exhaust fan, which I'm
leaning towards selecting, despite its nasty habit of CFM dropping
quickly with filter cloggage.
I'll be using HVLP sprayers, and am prepared to keep the filters
clean, so how important is this trait to me?
Besides its lower price ($177 vs. $242), I'm drawn, so to speak, to
the fan's other advantages. For units having comparable CFM, the fan:
- is about half the weight,
- is about half the front-to-back depth,
- is easier to mount to the back of the booth,
- produces about the same amount of noise,
- can use a ($20) variable speed control for those times
when I just want some air movement in the studio,
- uses less than 1/3 the electricity,
- doesn't require shielding from weather.
So... whataya think? If the only real disadvantage is that CFM will
drop as the filter clogs, is there really a reason to get a
centrifugal/radial wheel/squirrel cage blower?
Thanks.
Regards,
Maurice, still here in Fairfax, California, staying awake until
midnight while the 2005 Cream Albert Hall concert is winding down
(Ginger Baker is 66 and still the best drummer alive), counting the
nights to our 20th annual latkefest, and enjoying these last days
before the Sun begins inching its way to a higher place in the sky to
more generously enlighten us for another year.
Speaking of enlightenment, and despite the recent regrettable rancor
in clayarttown, I've really been enjoying some of the recent threads
(and happily ignoring others). More about that later. Time for
sleep.
______________________________________________________________________________
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
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