TerryAllen
New
Can anyone tell me where I can find suppliers, preferably in the Middle East, for breathing bellows to be used in my rebreather?
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MrConclusion:Quoted from http://www.portup.com/~dfount/drfpascr.htm
McMaster-Carr sells a range of neoprene-coated nylon bellows ranging from 1 3/4" O.D. to 12" O.D. If I could find a suitable tube for the main housing (approximately 7" I.D.), I'd use the 6 3/4" O.D. X 5" I.D. bellows for the outer bellows. This would need to be about 9" long to give a maximum counterlung volume (my vital capacity) 4 liters. An inner bellows measuring 3" O.D. X 2" I.D. would give a discharge ratio of about 17%. An 8" X 6" outer bellows would allow a shorter counterlung (at about 6 1/2") and would give a choice of 3 1/2" X 2 1/2" or 3" X 2" inner bellows for a discharge ratio of 18% or 12%.
That's www.mcmaster.com
They're a very serious operation, and I'm almost sure that they either have international shipping, or can arrange it with a customs agent.
Dan's Rebreather Brainstorms:I've hear from a couple of homebuilders who tried the neoprene-coated nylon bellows from McMaster and found them too stiff for counterlung use. The polyurethane bellows from the same source are said to be much more pliable and might work well.