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CFM parameters for electric forge blower?
Gavaksa - Friday, March 7, 2008 - 10:37amblacksmithing | forge
I'm building a gas forge right now, but one thing I'm not sure about is what the CFM parameters for a forge blower should be. The forge I'm making is a tube forge based on a modification of Tim Zowada's design. 12" dia. steel pipe 12" long, 1 1/4" insulation lining, refractory blanket wrapped, 3" x 4" doors at both ends. The gas and air inlet is side mounted toward the top of the cylinder. I need something I can consistently holding welding temperatures with.
The problem I'm having here is that I've never dealt with installing an electrical blower before. I've worked with them, but that doesn't mean knowing anything about them. I normally use a hand-crank blower on my coal forge.
So, what are the CFM requirements for a forge blower? I've got a couple of places to buy them, but I just don't know what to buy. Since it's going to be on a rheostat I can adjust it down, but what should the max be?
I'm thinking an 80 CFM would be sufficient, but that's really just a guess. I would really appreciate any assistance anyone can provide.