Do non-compressor (eg hvlp) air fed masks exist?

[julianf]

Ive got a few squirrel cage fans here - they're only 400w, and you cant hardly breath when the'yre pointing at your face.

It got me to thinking - why are air fed masks always fed from the compressor (and then need all the filters to take the oil out) when they really don't need much in the way of pressure.


Im not wanting to rig anything up, but, if that kind of thing exists, it must be a load cheaper, than having to buy coalescing filters and the like?

 

[brightspark]

Ive got a few squirrel cage fans here - they're only 400w, and you cant hardly breath when the'yre pointing at your face.

It got me to thinking - why are air fed masks always fed from the compressor (and then need all the filters to take the oil out) when they really don't need much in the way of pressure.


Im not wanting to rig anything up, but, if that kind of thing exists, it must be a load cheaper, than having to buy coalescing filters and the like?

the size of the airline to helmet would need to be the size of a hoover for the amount of cfm required

 

[rtbcomp]

I used a car heater blower to feed my blasting helmet, as BS says, it needed a vacuum cleaner hose. If you do go down that route, buy a new hose you don't want to be breathing air that's full of fluff and germs.

For me the advantages were 1) Less demand on the compressor 2) I ran it from a car battery and charger, so if there was a power cut I would still have air.

 

[richie00boy]

They are available in the USA, one is called HobbyAir. Seems like a much better idea to me.

 

[brightspark]

They are available in the USA, one is called HobbyAir. Seems like a much better idea to me.

very restrictive if u have to move around and get in the way .the thin pressure fed ones can be dragged round easily as there fastened to your belt

 

[rtbcomp]

I worked at a bench in a blast room so that wasn't a problem, but it wasn't all that bad when I had to step outside. I had a 3/4m length of washing machine drain hose fastened to the helmet which pushed into the vac hose. The end of the vac hose was then connected to some larger bore water pump suction hose which then went into another room where the compressor was, well away from the dust.

This room was quite warm once I'd got going which gave a nice warm breeze inside my helmet.

If you do use large bore hose, provide some sort of insect screen, you don't want an angry wasp buzzing about inside your helmet.

 

[mr migwire]

adflo is hvlp isnt it...