supplied air resperator

what should i be looking for in an supplied air respirator not doing a lot of painting trying to keep cost down but do not want to skimp here what models do you use
 
Quite a few threads on this topic in the archives. You might check there for more opinions. I use the Breathe-Cool system with the full face-mask. It provides nice cool air. Just be sure the pump is in the fresh air and away from the painting. Some have the same system but use the hood which is handy for sandblasting as well. If you wear glasses the face-mask becomes a little uncomfortable.

Downside is the air hose. The hose uses a plastic coil with the hose molded around it. The coil provides support for the hose to keep the line open. If the coil breaks the hose easily crimps and cuts off air flow. The coil breaks easily if you inadvertantly step on it and causes a leak. The coil also seems to become brittle over time. I just removed about 15 feet of hose and used and male water hose adapter to replace the end. Worked good. Make sure you get enough hose. I bought 75 feet and still have plenty left. Hope this helps.
 
I got mine on Ebay. Bought a 3m battery powered blower that hooks on your belt/ or vest 3m sells. Watched for a SATA bump cap with flip up face shield, between the 2 I spent about 300.00 for a 1000.00 plus unit. It has tube from blower to helmet. Can wear glasses, have beard,and it is not tied to another hose. Go to Ebay and put in PAPR and do some research on wat will work for you. The past posts on this forum are great.
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(quoted from post at 17:32:12 11/13/12) what should i be looking for in an supplied air respirator not doing a lot of painting trying to keep cost down but do not want to skimp here what models do you use
I have an Allegro that I found no Craigslist that was barely used for $300.00, though I had to drive a ways to get it. This is around a $900.00 unit. http://www.envirosafetyproducts.com/supplied-air-respirator-system-fresh-air-respirator-fullface-mask-one-man.html
 
I hav afully self contained unit has resh air pump and all hoses,i used itfor welding butwith different head piecethey are used for painting. i no longer weld so its for sale
 
If the intake connects to your belt you are breathing contaminated air. I have seen pictures of those worn by people applying herbicides. It might work more or less there, but I don't see how it can possibly work for isocyanates when you are surrounded by fumes containing iso's, even if it is feeding a charcoal mask. It would be very similar to a hose equipped supplied air unit with the blower/intake in the fumes.
 
The 3M unit has 3 large screw on filters and will work for paint. As 3M supplies manny different types of filters, I emailed a spec. sheet for the paint I am using and the replied as to filter needed. I will admit firters are a little expensive (3 @65.00 ea.) but no hoses.
 
But, if you are using hardener, there is no filter that will keep isocyanates out, unless you keep a very rigid replacement schedule. I imagine they need to be changed after every use if they work then -- $$$. I trust nothing but supplied air. Read the fine print that comes with your filters.
 
I agree.

Just to add to the discussion:

3M does not recommend air filtration at all when the actual air concentration of contaminants is unknown. Filters can be used (per 3M) if 1) the correct ones are selected for isocyanates, 2) the actual concentration is known to be less than 10 times the occupational exposure limit for isocyanates, 3) a documented change schedule is followed and 4) fit testing is performed.

Of course any DIY painting outside of a professional, tested spray booth always involves unknown and highly variable concentrations of contaminants.

My opinion for DIYs - forget filtration for isocyanates. Get a supplied-air system and be done with it. Or stay away from hardeners and urethanes altogether.

Ref: <a href="http://multimedia.3m.com/mws/mediawebserver?mwsId=SSSSSufSevTsZxtUOxmG4x_SevUqevTSevTSevTSeSSSSSS--&fn=3M%20Respirator%20Selection%20Guide_Se">3M Respirator Selection Guide</a>
 
I have a breathe-cool with the full helmet. I love it, can paint all day and not be effected by the hardeners.

Get a long enough hose that you can put the compressor in clean air.
 
there is a big difference between a PAPR (Powered Air Purifying Respirator) and a SAR (Supplied Air Respirator. If you are going to spend money you want the SAR a PAPR is nothing more than a cartridge respirator with a pump.

to answer the original question the

Breathecool can be had for around $320
Hobby Air can be had for $400
(for half face models)

either will would work for limited duty as others have said a long hose is required (i recommend a 75' hose)

-paul
 

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