Supplied Air Respirator
- Thread starter ShawnAM
- Start date
I wouldnt use it if I was painting 9-5 everyday, but intermittent use, maybe.
WhoWhatNow
Well-known member
If you are worried enough about your health to get a mask at least get one that is semi-reputable:
https://axispro.com/index.php?l=product_detail&p=4
https://axispro.com/index.php?l=product_detail&p=4
WhoWhatNow
Well-known member
If you are worried enough about your health to get a mask at least get one that is semi-reputable:
https://axispro.com/index.php?l=product_detail&p=4
https://axispro.com/index.php?l=product_detail&p=4
cvairwerks
Well-known member
Doubt that you are going to get the required 7 SCFM @ 75 PSIG from an oil less unit and run an HVLP gun at the same time.
Also, might be worth asking yourself why a known to be good system costs 10 times what this unknown Asian system does.......
Also, might be worth asking yourself why a known to be good system costs 10 times what this unknown Asian system does.......
rlitman
Well-known member
The CFM requirements of a supplied air respirator will be at least as high as your HVLP gun. I'm not familiar with an inexpensive oil-less compressor that can feed one, and I would absolutely not consider breathing air that went through my oil lubricated piston compressor.
That's why the real ones most often use a turbine compressor.
That's why the real ones most often use a turbine compressor.
66Caprice
Well-known member
Just an FYI for you.... If that mask or filter fails and you start to inhale OIL contaminated air your lungs will never recover from that..... And if you inhale enough OIL it will terminate your life...... Don't cheap out on your air supply.....
Thanks for the replies so far. Definitely some things to consider.
I know that the "filters" are in no way adequate to utilize a splash oil compressor. That is what will be feeding the HLVP gun.
This would be a separate system to just feed air for breathing. And again, an oil-free compressor. I have one like this that would supply about 4ish cfm at about 75 psi. I don't know if the "recommended" air rates on the ebay ad are thinking you are going to be running a paint gun too off the set-up.
As an aside, they sell just the filter and attachments that can be used with the 3m brand full face mask.
I know that the "filters" are in no way adequate to utilize a splash oil compressor. That is what will be feeding the HLVP gun.
This would be a separate system to just feed air for breathing. And again, an oil-free compressor. I have one like this that would supply about 4ish cfm at about 75 psi. I don't know if the "recommended" air rates on the ebay ad are thinking you are going to be running a paint gun too off the set-up.
As an aside, they sell just the filter and attachments that can be used with the 3m brand full face mask.
K13
Well-known member
Epoxy has no iso cyanates in it so it is not quite as toxic as urethane paints. If you are spraying outside a good quality full face respirator would be fine to use.
rlitman
Well-known member
First off, even the oil-less compressor you mention is not designed to supply breathing air.
Second, the ebay listing you linked says more than 7 CFM. NIOSH and the CDC say that 4 CFM is required for a PAPR for a tight fitting mask, and 6 CFM is required for a loose fitting mask. But those numbers are safety minimums, and are only considered safe when the mask has been actually flow tested. Without a floating ball tester than can verify that you have positive air pressure in all mask positions, while rapidly inhaling, you have no verifiable margin of safety.
Also, that system will have significant efficiency losses due to the way the pressure is regulated. I'm guessing that's why they suggest at least 7 CFM. Remember, you couldn't HVLP paint with that compressor either.
So it sounds like even an oil-free compressor is not a good idea/ will not work with that set-up for breathing air. So, scratch that idea.
Off of what K13 said, I am going to call 3m and see if any of their organic vapor cartridges will filter strontium chromate (my primary concern).
If not, then I guess I have bit the bullet and get the hobbyair system.
And for clarification, HLVP spaying will be done using 80 gal. qt-5, not the "hot dog'
Off of what K13 said, I am going to call 3m and see if any of their organic vapor cartridges will filter strontium chromate (my primary concern).
If not, then I guess I have bit the bullet and get the hobbyair system.
And for clarification, HLVP spaying will be done using 80 gal. qt-5, not the "hot dog'
cvairwerks
Well-known member
Shawn: I know you have this question up on another activity specific board and you will get good advice from there too. The one thing I will caution you to do, is download and read completely and understand the SDS sheet for all the components of the paint you are going to use before you do anything. The SDS will give you the specific requirements that the vendor determines to be the absolute minimum in safety for using that product. Generally, they have contact points so that if you have a question or are unclear about something on the sheets, they can get you the absolute answers.
Remember you've only got one set of lungs and replacements are expensive and the 3 letter agency will screw you over if you need to get replacement ones, 'cause they're not happy until you're unhappy....
Remember you've only got one set of lungs and replacements are expensive and the 3 letter agency will screw you over if you need to get replacement ones, 'cause they're not happy until you're unhappy....
rlitman
Well-known member
Strontium chromate is not an organic vapor. A P100 filter will handle it just fine.
mike93lx
ALLIANCE MEMBER
For an air supply, how about a SCBA tank mounted nearby.
I don't think its necessary, but it at least isn't dangerous to your health like a regular compressor would be
I don't think its necessary, but it at least isn't dangerous to your health like a regular compressor would be
Yes that other place is generally a wealth of knowledge. However, it was harder to find info on this specific issue.
The primer I am using is the 463-12-8 azko nobel. Some had suggested full supplied air respirator and other were just using with a full face respirator.
I did find the SDS but all it stated regarding respiration protection was an "air purifying or air fed respirator." I was able to go down the list of harmful chemicals and cross reference with the 3m filter guide. It appears that 3m says the Organic Vapor cartridge will work on all chemicals involved.
I suspect it will require new filters after each use though.
K13
Well-known member
If you are doing it outside and in a relatively short amount of time you probably won't have to replace the filters that often but if it is long periods of time between spraying sessions you should replace them as they will lose their effectiveness being exposed to the air.
rlitman
Well-known member
Of course. With proper PPE, you don't get exposed.
If this were me, I would use a good (3M, etc.) filter mask (full face preferred, or half mask in conjunction with eye protection) and call it a day. The paint fumes will likely disperse quickly outside, especially if there is even the slightest hint of a breeze.
cvairwerks
Well-known member
Shawn: What the SDS is recommending is to have positive pressure breating air so that the chances of getting the fumes into the mask are minimized. Those recommendations make the assumption that you are working in a location that air turnover is very slow, and the fume concentration will climb as you paint. If you are on a remoted positive source, then filtering is not required. If you’re on a belt pack source, then it has to be filtered.
Painting outside, in still air, you would still need some filtering, but the positive pressure requirements could be reduced.
Painting outside, in still air, you would still need some filtering, but the positive pressure requirements could be reduced.
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cvairwerks
Well-known member
Try breathing via a garden hose for a moment or two. Diameter and length as well as flow characteristics would dictate hose diameter for the distance required.
mike93lx
ALLIANCE MEMBER
Because you would just inhale your exhaled breath...
rlitman
Well-known member
You’d need a check valve and exhilation valve, but the pressure loss from the hose still makes it untenable over more than a couple of feet.
sberry
Banned
Yes, a full face mask outside.
Thanks for all the help on this guys! I am going to get a full face mask and p100 filters.
But for arguments sake, this was posted in the other forum I posted on. What are your thoughts or comments:
" Solution:
Hood from Amazon:
https://www.amazon.com/Atoplee-Proof...,167&sr=8-37
Corrugated vacuum hose:
https://www.amazon.com/Poolmaster-33...&sr=8-16:cool:
Bathroom fan as blower:
https://www.amazon.com/Delta-Breez-S...gateway&sr=8-5
Make an adapter (15 minute fiberglass project) to connect the blower and the hose. Use duct tape or zip ties to hold the other end of the hose under the hood. It is good to secure the hose to your waist and leave slack in the hose between your waist and the hood.
Stick the fan in an area with clean, fresh air, turn it on, and voila, a blanket of fresh air inside your spray hood."
I would think back pressure or something to that effect would prevent the air from actually circulating.
But for arguments sake, this was posted in the other forum I posted on. What are your thoughts or comments:
" Solution:
Hood from Amazon:
https://www.amazon.com/Atoplee-Proof...,167&sr=8-37
Corrugated vacuum hose:
https://www.amazon.com/Poolmaster-33...&sr=8-16:cool:
Bathroom fan as blower:
https://www.amazon.com/Delta-Breez-S...gateway&sr=8-5
Make an adapter (15 minute fiberglass project) to connect the blower and the hose. Use duct tape or zip ties to hold the other end of the hose under the hood. It is good to secure the hose to your waist and leave slack in the hose between your waist and the hood.
Stick the fan in an area with clean, fresh air, turn it on, and voila, a blanket of fresh air inside your spray hood."
I would think back pressure or something to that effect would prevent the air from actually circulating.
rlitman
Well-known member
Dunno. Those links don’t work for me.
May be more than you want to spend but seems to be a decent unit for the money. https://www.amazon.com/dp/B00GAFD5G0/?tag=atomicindus08-20
LS6 Tommy
Well-known member
One thing no one has mentioned is that no one should use any respirator other than a nusiance dust mask without being properly fit tested and trained...
Tommy
Tommy
Try breathing via a garden hose for a moment or two. Diameter and length as well as flow characteristics would dictate hose diameter for the distance required.
At my Friend's body shop, his supplied air system had a larger diameter hose. I have since updated it to a smaller diameter (I forgot the size) that the supplied air system company now recommends. It is much easier to drag around while painting.
like2wheel
Well-known member
Proper fit is much less critical with a supplied air respirator.
This is why they are recommended people with facial hair.
YukonXL04
Well-known member
Maybe... but you still need to be clean shaven on all areas the mask touches in order to seal. I get fit tested every year. And do 3-5 supplied breathing air jobs a year. But I'm also around much much more dangerous chemicals.
bobabuee
Well-known member
rlitman
Well-known member
And we’ve gone full circle.
I think that the fit is less critical for painting because the supplied air is way more than you need and has to then vent someplace, so it venting out the sides is ok.
Marctrees
Well-known member
I connected a very small Sears shop vac to the back of my sandblasting helmet.
Works great, keeps my head and lens from sweating.
Vents out over my shoulders.. NO way anything can get in cause the CFM is pretty high.
25' 1 1/4" hose so the vac is inside shop w doors closed.. while I'm outside blasting.
Marc
Works great, keeps my head and lens from sweating.
Vents out over my shoulders.. NO way anything can get in cause the CFM is pretty high.
25' 1 1/4" hose so the vac is inside shop w doors closed.. while I'm outside blasting.
Marc