We found a cool solution to our problem. I agree with all the previous
comments especially those of Rex and Mike regarding the stringent
requirements with self contained or supplied air breathing apparatus or is
that apparati?

Our solution was a Backpack Kit from Grainger that attaches to a half mask,
http://www.grainger.com/Grainger/wwg/productIndex.shtml?operator=keywordSear
ch&search_type=keyword&QueryString=bp-1002&submit.x=13&submit.y=8. It has
two hoses that go down the operators back and has a canister attached to the
end of each hose. Since he's working under a hood the fresh air is pulled in
from behind him and he never gets the canisters near the alcohol.

It was a simple solution to a big problem.

Thanks for all the input,

KennyB

Ext 43-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]] 
Sent: Wednesday, June 18, 2008 11:04 AM
To: [log in to unmask]
Subject: Re: [TN] respirator cartridge for IPA

Please be cautious with this airline respirator?approach as well. There must
be an in-line CO detector to safely use "wall plug" compressed air. An
affordable alternative might be a Survivair-type inexpensive supplied air
unit. In all cases, though, the flammability must also be considered and may
require ventilation.

Mike Moninger
Thermospray Company, Inc.


Date:    Tue, 17 Jun 2008 16:31:40 +0200
From:    Matthias Mansfeld <[log in to unmask]>
Subject: Re: Respirator Cartridge for IPA

On 17 Jun 2008 at 17:19, Brian Ellis wrote:

> If the activated carbon filters on the masks are saturated, then they
> are worse than useless. If the operators can smell the stuff, then
> they must be saturated. A filter is generally quite small, typically
> containing 30-40 g of carbon, which may adsorb, say, 5 g or so
> solvent. I suggest that you find a scuba diver who will lend you his
> tanks!

Or, if you have pressurised air in a appropiate quantity and quality 
available out of the wall plug, you could use masks with supply from 
that pressurised air. Many work safety manufacturers (like Draeger, 
Auer-MSA etc.) offer such stuff. Just a special hose for the "wall 
plug", pressure regulator to wear at a belt, another hose to the 
mask.

Best wishes
Matthias

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