What recommendation do you have for a positive pressure air supply?
My pal is welding using an alloy that contains manganese and he would like recommendations for safety gear to keep him from harm.
Thanks!
--Winston
What recommendation do you have for a positive pressure air supply?
My pal is welding using an alloy that contains manganese and he would like recommendations for safety gear to keep him from harm.
Thanks!
--Winston
The common welding rod alloys like 6013 or 7018 contain manganese.
i
He's probably using one of those.
Right now, I'm considering that he should buy a 12V squirrel cage blower and glue a 1/2" PVC pipe to the back of his helmet to receive a CPAP hose.
Probably rig up an activated charcoal filter on the input side somehow.
--Winston
Just use a regular 3M or North half mask with the appropriate filters. Make sure that it fits right and makes a seal on his face. If they are cinched up too tight, they won't fit correctly.
I would vote for this too.
i
OK, Thanks Drew and Iggy.
--Winston
I bought my first powered welding respirator 16 years ago and never regretted it.
3M is the biggest player in powered respirators, since they bought out everybody else.I still have both of my Racal air hats. One of them I adapted to my Nexgen hood.
2 years ago at school we had to MIG weld a lot of aluminum to build a pair of salvage pontoons. I brought both of my air hats in and we used them for all the interior welding. Makes a huge difference at the end of the day. Blow your nose out and it ISN'T black snot.If you want to build your own you will need a few pieces from the commercial units.
The air duct unit is this part
The face seal
The air hose
The head cover
A Flow Indicator will show if you have enough air
Those parts shouldn't cost too much and will make it a breeze to be up and running.
You can use air from any source that can be filtered and can be regulated down to about 3 PSI.
You can buy used CPAP (for Sleep Apnea) machines on Craigslist for under $100. A CPAP would be the perfect blower. Just adapt a larger industrial air filter to the intake.
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Wow! Thanks Ernie, I will follow up all those links.
--Winston
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