What CFM rating are you using for your forced air/induction burners for forges????

[stefanj]

I am going to try and build a forced air burner for my forge and I am trying to figure out what CFM rating I should use??
I am using 1" ID pipe with about a 2" inlet into the forge body.
Fuel type is propane.

Thanks,
Stefan

 

[S.Knowles]

I am using on of these,http://www.grainger.com/Grainger/items/4C440 Its more than enough blower. Plus you can get a speed controller for it to slo it down if you want.

 

[Ken Kelley]

It doesn't take a hurricane blast to run a forced air burner. The rule of thumb is use at least a 25 cfm blower. I've used everything from the outlet side of a shop vac to an old hair dryer. As long as you have a gate valve in the system to control the air flow you can use just about any puffer.

Ken

 

[B Finnigan]

90 cfm and use only 30-40% of the flow. 100% for welding.

 

[Don Hanson III]

I'm using 2" pipe with a 1.5" bell reducer on the forge end. Big forge

90 CFM closed down 90%. Closed 75% for welding.

 

[A C Richards]

75 cfm for me. Closed off 80-90%.