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Supplied air questions

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Randy_NE

02-24-2006 06:47:10

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I have been following some of the discussions on these forums about using a supplied air system and want to look into it for sandblasting & painting.
I wear glasses and any dust type mask I have ever worn always fogs up my glasses, do the supplied air systems prevent that?
Do the pumps on these go outside to draw in fresh air?

Randy

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B-maniac

02-24-2006 17:51:15

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Re: Supplied air questions in reply to Randy_NE, 02-24-2006 06:47:10

I guess what you are saying then is if you don't have supplied air respirator then I guess you don't do any painting or sandblasting unless you are willing to use old world inferior technology refinish products. I am extremely alergic to iso's,starting back in the mid-late '70s when Dupont first came out with their 792/793 for Centari ,I found this out the hard way and trust me I wouldnt use a resp. that doesn't filter it out . The residue on my clothes or disposable suite if I don't remove them will cause a reaction. The canister type resp. I use does remove it or I would be the first one know. I realize the manufacturers aren't going to risk the liability any more and say their resp will filter out isos. Don't blame them, but as sensitive as I am to it ..it must or I would know it. If the cartridge type full face respirator isn't enough protection,then one probably should not risk leaving their house every morning.

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CNKS

02-24-2006 19:53:57

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Re: Supplied air questions in reply to B-maniac, 02-24-2006 17:51:15

You are living dangerously. Do you get asthma like symptoms? You are unknowingly inhaling small amounts of iso's unless your cartridges are new and you have someone put duct tape around your mask -- no joke. If you want to do that fine, but please do not indicate that a cartridge mask is safe, even outdoors -- it is not. If you think the fumes are blown away, wait until there is a 5-10 mph wind, take your mask off and spray some oven cleaner, I promise you that you will smell it. If your mask does not fit perfectly, you ARE getting iso's. Maybe you are not as sensitized as you think. True sensitization (is that a word?) means that only a very brief exposure will give a very severe reaction. I have a reaction to unhardened paint fumes, if my filters are about gone, and I don't like the odor on my clothes, I feel somewhat ill but I don't get deathly ill as I would if I were sensitized to iso's. I know what it is to be sensitized to certain chemicals, because I didn't know any better and thought it wouldn't hurt me, I am now sensitized to certain herbicides because I didn't wear a mask. Again for others sake, not yours, as that is your business not mine, do not tell others that a charcoal mask is safe for iso's, under any conditions -- it isn't. By the way, as to my response to your first sentence, yes that is what I am saying. I will not do refinishing with hardened paint without supplied air. $500 for supplied air is cheap.

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B-maniac

02-24-2006 17:15:28

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Re: Supplied air questions in reply to Randy_NE, 02-24-2006 06:47:10

I think maybe I was misunderstood . What I said was to have the pump drawing it's air from an area close to the same TEMPERATURE as the area where you are painting. I guess what I'm really saying is resist the temptation to locate the pump and/or intake outdoors. I live in northern Michigan, and up here you don't pipe your air compressor or supplied air resp. out in the cold ,and in the summer,humidity. If the building you are in is not large enough to have a seperate clean air room then I guess maybe your'e stuck with outside air. I guess maybe I shouldn't have presumed that everybody has that luxury like I do.

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CNKS

02-24-2006 19:35:17

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Re: Supplied air questions in reply to B-maniac, 02-24-2006 17:15:28

I have exhaust fans that draw in outside air, granted I don't paint more than a few minutes if the outside temp is in the 20's, more often it's in the 40's (in the winter) before I start. I can maintain 65-68 in the booth fairly easily. I can leave my heat on as no fumes get outside the booth. The intake of the supplied air unit I use is in a slightly open window, meaning whatever temp the outside air, that is what I am breathing, temp does increase slightly as the blower warms up, but much less than it does in the summer. There is good air flow through that window with the fans on. For sandblasting, regardless of temperature, the intake is outside upwind from where I am working. If there is no wind I have to make sure the intake is far enough away so that I'm not inhaling silica through the intake.

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CNKS

02-24-2006 16:54:05

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Re: Supplied air questions in reply to Randy_NE, 02-24-2006 06:47:10

You won't get fogging. You can get the Hobby Air with a hood, so glasses will work with it. You don't ever want to wear just a dust mask for painting, they don't even work very well for dust, certainly not sandblasting. In the summer the blower for the Hobby Air gradually produces warmer and warmer air, can get uncomfortable -- just take a break. I don't know if the other brands are cooler or not, as I have only used Hobby Air. It has nothing to do with the air you are painting with. You MUST put the intake outside, away from the painting or sandblasting area, as the filters are only designed for normal atmospheric dust, and will filter neither iso's in hardeners nor silica from sand. If you put it in the same area, you are worse of than not using one at all.

Hobby Air

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B-maniac

02-24-2006 16:02:13

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Re: Supplied air questions in reply to Randy_NE, 02-24-2006 06:47:10

Yes they will prevent the fogging,and as a matter of fact they give the same affect as air cond. on hot days painting.As soon as you take it off you will realize how hot it is. You do want the pump to be drawing air that is close to the temp where you are painting.Don't use warm inside air if you are blasting outside in the winter or visa versa. They are clumsey and inconveniant but if you do a lot of painting or blasting there just is no better way. If you are just going to be doing some small pieces in your shop with the doors open in the summer,just use a regular respirator,it will work fine.

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CNKS

02-24-2006 16:59:58

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Re: Supplied air questions in reply to B-maniac, 02-24-2006 16:02:13

"If you are just going to be doing some small pieces in your shop with the doors open in the summer, just use a regular respirator, it will work fine"--Not true, you are surrounded by either iso's or silica, no matter where you are. Repeated use will get you in a lot of trouble.

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