lkatz@tamucc.edu on mon 5 may 97
Vince Pitelka wrote:
> Dennis -
> I expect that Louis Katz's suggestion would work fine, and is no doubt the
> least expensive solution. But if it turns out that you are required to have
> the slotted intake to create an air curtain, don't worry. It works great.
I suspect that a combination of the two systems might be best. The
point of source removal from the mixer is fine for what it does, you
also need air removal for weighing out clay, dust on the floor and
everything else. Make sure the blower is big enough. Down here in S
Texas when someone installs a slot hood it sucks but doesn't suck
enough. Couldn't help myself.
Louis Katz lkatz@falcon.tamucc.edu
Texas A&M University Corpus Christi
6300 Ocean
CCTX 78412
(512) 994-5987
http://www.tamucc.edu/~lkatz
--
Louis Katz lkatz@falcon.tamucc.edu
Texas A&M University Corpus Christi
6300 Ocean
CCTX 78412
(512) 994-5987
http://www.tamucc.edu/~lkatz
Melissa on fri 4 mar 05
I just wanted to share my latest experience with dust collection. I wrote
a few months ago about looking to cut down on dust while mixing clay. I
teach a full high school ceramics program and all the clay we receive is
in dry form. The ventilation was poor to none, so the school purchased a
bailey hood that bolts to the top of the soldner mixer lid. This hood,
however, does not come with any time of fan/motor to help exhaust the dust
(I'm not sure what they thought the hood would do by itself?!). To make
solving the problem more difficult, my mixing room does not sit next to an
exterior wall (making it impossible to expell the dust outside). My
school then purchased a self-contained JET dust collection unit. We had
to buy an extension hose to add to the one that comes with the Bailey
hood. I must say I'm pretty impressed with how it works so far. The
filters seem easy to change, and the collection bag is quite large. The
exhaust is powerful (even on the small 1 1/2 hp motor), so you have to be
careful when adding the clay through the opening in the hood - clay dust
is so light that it whips right up the tube before falling through the
mesh. I found that if you stand the bag up on end so that the clay stays
contained by the sides of the bag, the clay goes where it is supposed to
and only the residual dust escapes.
I haven't had the unit long enough to see how often the filter needs
changed. The only downfall I see for now is the noise it creates. My
maintenance staff was thoughtful enough to build an insulated wall around
the unit to cut down on the noise (However with this, I lost a large table
and all of my glaze storage space).
I'm unsure where the school got the "dust dog", but I did find the same
unit online - less than $500, plus the cost of the bailey hood, of course.
Just google "Jet Dust Collector 1 1/2 hp"
In conclusion? Bailey should make a dust collection unit to go with that
hood and save us all some running around!
Thanks for letting me share,
Melissa
Jennifer Buckner on thu 18 nov 10
For those of you who mix your own glazes and do other dust-making
chores, here's a new gadget that should help to keep the dust clouds
down. I have no interest in either the manufacturers or the distributors.
Jennifer in northern VT
Jennifer G. Buckner jennifer@buckner.cc
gayle bair on thu 18 nov 10
A big issue here is the use of a shop vac that does not have an adequate =
=3D
filter and spews particulates back in the air.
Gayle Bair
Bainbridge Island WA
Tucson AZ
gayle@claybair.com
www.claybair.com
>=3D20
> -----Original Message-----
> From: Jennifer Buckner
>=3D20
> For those of you who mix your own glazes and do other dust-making
>=3D20
> chores, here's a new gadget that should help to keep the dust clouds
>=3D20
> down. I have no interest in either the manufacturers or the =3D
distributors.
>=3D20
>=3D20
>=3D20
Paula Rutledge on thu 18 nov 10
I wonder if they have thought of making one big enough for a big, old So=
=3D
ldner mixer.
Paula
=3D20
=3D20
=3D20
-----Original Message-----
From: Jennifer Buckner
To: Clayart
Sent: Thu, Nov 18, 2010 11:37 am
Subject: Dust collection
For those of you who mix your own glazes and do other dust-making
chores, here's a new gadget that should help to keep the dust clouds
down. I have no interest in either the manufacturers or the distributors.
Jennifer in northern VT
Jennifer G. Buckner jennifer@buckner.cc
=3D20
Johanna DeMaine on thu 18 nov 10
Interesting to see this "new invention". However this type of dust=3D20
collection/air filtration has been around for a very long time. It is ba=
=3D
sed on the=3D20
"elephant trunk" filtration system which has been used both in the cerami=
=3D
cs=3D20
industry as well medical testing laboratories etc. Read here an extract =
=3D
I=3D20
unearthed through a simple google of the term "elephant trunk air filtrat=
=3D
ion" I=3D20
encountered many of these during my H&S research in the UK in 2001.
Elephant trunk ventilation systems
From: Marc A. Williams =3D20
Date: Saturday, August 4, 2001
Heather Place writes
>We are currently undergoing upgrading to our conservation lab, and
>after years of our fume extraction system not functioning correctly,
>we are working to rectify the problem. We are currently looking at
>ways to improve our existing elephant trunks and were wondering if
>anyone has any suggestions.
>
>Is there anything new on the market that anyone has experience with?
>I have heard that they now come with lights on the end. This would
>be very helpful.
Here are a few thoughts on the ventilation issue. We work on
furniture and horse-drawn vehicles, so are facing similar concerns,
but probably on a much lower budget. The fundamental conflict is
that if ideal ventilation is achieved, that ideal (and totally
artificial) controlled environment that we have worked so hard to
achieve will be blown through the exhaust.
There are two primary factors to consider in controlling
ventilation. The first is the air volume and the second is
containment. Elephant trunks attempt to isolate a small area and
contain the fumes in this area. In order to function effectively,
there must be an adequate air volume (CFM) flowing through them.
Often, this is calculated at the opening. However, it is virtually
impossible to work with the opening directly over the item. As the
opening moves back from the object, the air movement at the object
surface falls off since the air is not contained as well and is
being drawn from all directions. The use of a bigger end, either
purchased or self-fabricated, improves the containment, but also
increases the surface area and volume of air that must be moved,
requiring higher CFM through the elephant trunk to be effective. It
is very difficult to keep the trunk end close enough to the object
to be effective.
It may be possible to design a trunk end that would have a side
inlet at its bottom so that it could be placed next to the area
being worked on, yet still be very close to the object. In this
manner, the work area would not be obstructed and the air flow could
be better contained over the work area.
The next level of ventilation to consider is placing the object
itself within the ventilation trunk. The most common form of this
is the spray booth, which really is nothing more than a large trunk
end on a high-volume ventilation system. The air volume normally
required for spraying finishes probably is much greater than what
would be needed for solvent fume removal. If solvents are used over
large areas, elephant trunks will not be effective and a solution of
this type may be necessary. Clearly, the greater the air volume
moved, the more difficult and expensive it is for environmental
control systems to operate.
A final possibility is to exhaust an entire room, but doing so will
overwhelm most environmental control systems and may significantly
increase utility costs. This is the alternative we use, since many
of our objects are very large and we have a relatively small studio
space. In addition, we are often treating large surface areas at
one time (e.g. coating application or removal). For critical
solvent removal, the object can be placed directly next to the
exhaust fan, increasing air flow over it. For more gentle solvent
removal, the object can be at the center of the room. This method
results in compromises. Overall air flow is not ideally high, so we
place ourselves upstream in the air flow. We try to work with less
harmful solvents when possible and use respirators when we can't.
Depending upon the weather, we can't hold the environmental
conditions within desirable tolerances, but generally this is of
short duration.
Marc Williams, President
American Conservation Consortium, Ltd.
85 North Road
Fremont, NH 03044 USA
Cheers
Johanna
Johanna DeMaine
http://johanna.demaine.org
http://overglaze.info
http://allthatissublime.com
Jennifer Buckner on fri 19 nov 10
At 09:28 PM 11/18/2010, Gayle Bair wrote:
>A big issue here is the use of a shop vac that does not have an
>adequate filter and spews particulates back in the air.
>
Gayle,
If one had a built-in vacuum that exhausts to the outside (which I
do) I think this collector would be a great help in the studio. I
don't think it would eliminate the need for a mask entirely but it
would keep a good amount of any dust cloud from escaping into the
room atmosphere.
Jennifer
> >
> > -----Original Message-----
> > From: Jennifer Buckner
> >
> > For those of you who mix your own glazes and do other dust-making
> >
> > chores, here's a new gadget that should help to keep the dust clouds
> >
> > down. I have no interest in either the manufacturers or the distributo=
rs.
> >
> >
> >
Jennifer G. Buckner jennifer@buckner.cc
Lee Love on fri 19 nov 10
I do all dry mixing outside. Wear a mask!
--
=3DA0Lee, a Mashiko potter in Minneapolis
http://mingeisota.blogspot.com/
=3D93Observe the wonders as they occur around you. Don't claim them. Feel
the artistry moving through and be silent.=3D94 --Rumi
Ron Roy on sat 20 nov 10
That is correct - the trick is to keep the machine outside or vented
to the outside.
Central vac's are powerful and easy to vent to the outside - I used to
carry mine out side and use a long hose through a window when cleaning
up my old studio. Great for attaching to a box and venting dust when
mixing clays and glazes.
The idea of a wale tail in conjunction with a central vac would work well.
RR
Quoting gayle bair :
> A big issue here is the use of a shop vac that does not have an
> adequate filter and spews particulates back in the air.
> Gayle Bair
> Bainbridge Island WA
> Tucson AZ
> gayle@claybair.com
> www.claybair.com
>
>>
>> -----Original Message-----
>> From: Jennifer Buckner
>>
>> For those of you who mix your own glazes and do other dust-making
>>
>> chores, here's a new gadget that should help to keep the dust clouds
>>
>> down. I have no interest in either the manufacturers or the distributor=
s.
>>
>>
>>
>
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