Blower cfm

strahd71 · Jun 30, 2009

what size/cfm blower do you guys recommend for a forced air burner in the style of the ones on IG's web site?

i have a 60cfm i bought when i made a coal forge years ago and it worked fine for that but my blown burner doesnt get very hot with it. is this too small?

thanks

jake

efleming · Jun 30, 2009

I have a 75CFM to run a inside forge dimension of 8" X 14". Works great and achieves welding temps easily. What is your inside forge dimension?

Eric

strahd71 · Jun 30, 2009

i think its around 6''x14.

because i had it laying around i used 1 inch pipe for my burner. could that be the problem? if i went to 1.5 or 2 inch would it work better for me?

thanks for the help!

jake

efleming · Jun 30, 2009

It's pretty difficult to get a proper gas/air mix in 1" pipe. I'd go with 1 1/2 minimum and have your gas input at least 16" from where it enters the forge. This will give it room to mix properly with forced air prior to combustion. There are many ways to do it but this has worked for me...

Eric

strahd71 · Jun 30, 2009

eric thank you so much for the info. i wasnt sure about the size of the pipe when i made it but it was free at the time!

i will be buying the correct size pipe this weekend!

thanks again

jake

JTknives · Jun 30, 2009

I can tell you that 300 is to much on mine

strahd71 · Jun 30, 2009

300 cfm.... wow JT! are you compensating for something? just kidding, but seriously that might be a little over kill!

jake

JTknives · Jun 30, 2009

strahd71 said:
300 cfm.... wow JT! are you compensating for something? just kidding, but seriously that might be a little over kill!

jake

its a great blower and i i could have got it 3 times smaller for the price i paid i would have but i have it toned down and its working great. I will be listing my other blower in the forsale page shortley as i dont need it.