Militant83 Posted September 21, 2017 Share Posted September 21, 2017 Has anyone made and used the style of forced air burners that Roy from Christ Centered Ironworks made? If so how efficient are they? Are they capable of reaching forge welding temps? Any info provided on these would be great. Thanks Quote Link to comment Share on other sites More sharing options...
CMS3900 Posted September 21, 2017 Share Posted September 21, 2017 It's similar-ish to the ones I use. The blower he uses is 75 CFM so I would think it would get a small forge to welding heat no problem. A improvement on this design would be either a speed control or placing the air gate after the blower instead of the sliding gate on the side. Your burner is only one part of forge efficiency, so without knowing the rest it's hard to judge. Quote Link to comment Share on other sites More sharing options...
Militant83 Posted September 21, 2017 Author Share Posted September 21, 2017 It's similar-ish to the ones I use. The blower he uses is 75 CFM so I would think it would get a small forge to welding heat no problem. A improvement on this design would be either a speed control or placing the air gate after the blower instead of the sliding gate on the side. Your burner is only one part of forge efficiency, so without knowing the rest it's hard to judge. I wish he showed the forge it actually went on. But I haven't found anything in his videos that had that burner actually in use. I don't think the one in the thumbnail is it as it is never shown in the video. Quote Link to comment Share on other sites More sharing options...
Buzzkill Posted September 21, 2017 Share Posted September 21, 2017 I've used blown burners, but not that specific design. IMHO he made that way more complicated than it needed to be. It's like he was mixing a naturally aspirated burner with a blown burner. There is no need to introduce the fuel in that way. The fuel just needs to mix with the air. It doesn't need anything precise in a forced air burner. The only thing having a small orifice on the gas inlet does for you is create pressure at the regulator, which (if you have a gauge on it) makes it easier to take notes on how much pressure you used to get a certain result. In a forced air burner it's really only about the volume of fuel gas, not the pressure. It doesn't matter if the fuel is introduced by a MIG tip or other small orifice at high pressure or a 1/2 inch open end pipe at nearly no discernible pressure. It takes the right amount of fuel with the right amount of air mixed together to burn properly and produce the heat. Just about anything else is irrelevant. The flame holder disk he welds in the end of his tube isn't really necessary either, but it may provide some benefits. Personally I like to be able to adjust the air on the outlet side of the blower. To me it seems you have more control. Forced air burners are about as simple as it gets. There's no need to turn them into a major project. As far as reaching welding heat goes, there should be no trouble reaching that temperature as long as the fuel and air sources can provide enough of each. Containing the heat produced is another matter, which comes down to forge shape and materials. That will also have a major impact on the efficiency, but in general it takes a certain amount of fuel with the right amount of air to produce a desired amount of heat. Yes, some designs, like ribbon burners, sip the fuel at a lower rate than burners with a single larger opening, but the theory is that the reduced flame speed allows the heat to remain in the forge longer before being pushed out. Not having used this specific design, I don't know if his flame holder creates a similar effect to ribbon burners or not. Quote Link to comment Share on other sites More sharing options...
blacksmith-450 Posted September 21, 2017 Share Posted September 21, 2017 @Buzzkill : can you post some pictures of your burner please ? (or refer me to a thread if it's already done.) Thanks. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted September 21, 2017 Share Posted September 21, 2017 Note that adjusting air on the inlet side of a blower decreases the work a blower has to do as it does not increase the back pressure the blower has to work against---less load on the motor. Quote Link to comment Share on other sites More sharing options...
Buzzkill Posted September 21, 2017 Share Posted September 21, 2017 @Buzzkill : can you post some pictures of your burner please ? (or refer me to a thread if it's already done.) Thanks. Unfortunately no. I went back to naturally aspirated burners so I don't have to drag extension cords around since I forge outside but store the equipment inside. I've disassembled the blown burner and used portions of it in other projects. Quote Link to comment Share on other sites More sharing options...
BANAN Posted October 1, 2017 Share Posted October 1, 2017 Quote Link to comment Share on other sites More sharing options...
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