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3:24 am
NWBA Member
January 9, 2011
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Hello, I put an atmospheric burner together but it is very unstable. I'm running it on about 4 PSI of propane. The jet is a .035 mig tip threaded into a 1/8 pipe. The pipe threads in the plug at the top of the Wye tee so I cannot raise or lower the jet. I feel like I need to increase the velocity of the air. I would appreciate input on improving this burner. Thanks for your help, Cam.
3:26 am
NWBA Member
January 9, 2011
Offline3:53 am
October 19, 2011
Offline
CamButton;16999 wrote: Hello, I put an atmospheric burner together but it is very unstable. I'm running it on about 4 PSI of propane. The jet is a .035 mig tip threaded into a 1/8 pipe. The pipe threads in the plug at the top of the Wye tee so I cannot raise or lower the jet. I feel like I need to increase the velocity of the air. I would appreciate input on improving this burner. Thanks for your help, Cam.
Cam; I have built and used a number of these burners and I gotta tell you that to make it work you have to be able to adjust the height of the mig tip in the opening of the tee, to do this you need to drill and tap a Sched. 80 1/8" pipe nipple to recieve the mig tip then drill the plug to receive the nipple then drill and tap a set screw through one of the flats to hold it in place when you find the sweet spot that lets it burn right.
That bein said you can experiment with mig tip sizes and gas pressures to find what works for your tube sizes
and atmospheric conditions, feel free to pm me with any questions ,hope this helps ...
4:02 am
NWBA Member
July 9, 2010
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Cam,
It appears that you could use more air. In your first photo it looks like the burner pipe is bowed. If so, try a straight piece. Check the alignment of the jet. I get the best results when the gas is passing down the center of the burner tube. (not necessarily so with a blown forge though)
Keep us apprised of your progress.
Jeff
My son is the Blacksmith
5:36 am
NWBA Member
January 9, 2011
Offline
Jeff, the pipes for burners has been bent, I'm assuming to avoid the travel of heat up the pipe. I'll try a straght pipe to see if the air flow picks up. Clifford I have tapped the 1/8 schedule 80 nipple for the mig tip, but I haven't bored out the cap and installed a set screw. I thought the burner would run without having an adjustable jet height. Thanks for the input gents, have a great New Year. Cam
6:49 pm
NWBA Member
July 18, 2010
Offline
Cam, you may like to also have the versatility of increasing or adjusting the fuel pressure. Remember when you were at my house last April Fools Day? We were running forges that day at 12 to 20 psi at the regulator. I have found that it is nice to have that fuel adjustment after the sweet spot is found with depth in air flow adjustment of your mig tip.I agree with earlier comments regarding the importance of centering the fuel entrance point in the air stream.
Best Wishes and good luck with your experiments .
10:30 pm
NWBA Member
January 9, 2011
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Thanks Bruce, I did change the PSI in an attempt to adjust the flame. The flame became more intense at higher pressures but less stable. It appeared to not touch the end of the burner at 15-20 PSI and it would blow its self out.
1:09 am
April 7, 2011
Offline
It appears that you have a regular mig tip there. It is very important to have a tapered tip. The Tweeko T tip (T stands for tapered). I had a student who had built a burner using a regular mig tip and the forge just would not get up to temp. All that we did was to change to a T tip and it was great.
Wayne Coe
Artist Blacksmith
669 Peters Ford Road
Sunbright, Tennessee
423-628-6444
[EMAIL=waynecoe@highland.net]waynecoe@highland.net[/EMAIL]
http://www.waynecoeartistblacksmith.com
3:59 am
NWBA Member
January 9, 2011
Offline
Thanks Wayne, it is not a tapered tip. I'll see if I can track a tapered tip down.
12:15 pm
April 7, 2011
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You should be able to find T tips at any welding supply, although last week I went to an Airgas store and they didn't have them. I called my usual independant welding supply and they had 61 in stock.
Wayne Coe
Artist Blacksmith
669 Peters Ford Road
Sunbright, Tennessee
423-628-6444
[EMAIL=waynecoe@highland.net]waynecoe@highland.net[/EMAIL]
http://www.waynecoeartistblacksmith.com
5:28 pm
NWBA Member
July 18, 2010
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Let us know how your burner assembly is doing.
4:28 am
NWBA Member
January 9, 2011
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I will Bruce, Tweeco tips and stainless burner flares are in the mail. I think all forge operations are on hold for my niece's birthday party and the arrival of my mother in law this week end. I should be able to try the tapered tip and modify the tee cap so I can adjust the height of the jet.
6:27 am
October 19, 2011
Offline
CamButton;17022 wrote: I will Bruce, Tweeco tips and stainless burner flares are in the mail. I think all forge operations are on hold for my niece's birthday party and the arrival of my mother in law this week end. I should be able to try the tapered tip and modify the tee cap so I can adjust the height of the jet.
Ditto with Bruce let us know how it works...
7:15 am
NWBA Member
January 9, 2011
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New adjustable burner. Now I just need my flares.
6:41 am
NWBA Member
January 9, 2011
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Adjustable .35 Tweeco tapered tip, 3/4 pipe, 5 PSI propane. I think the flame is balanced but, I can't get rid of the red at the edge of the flame. Thanks to Wilson, Bruce, Clifford, and Wayne for their help.
6:43 am
NWBA Member
January 9, 2011
Offline2:11 am
October 19, 2011
Offline
Looks like a good flame, how does it burn in the forge ? and how fast does it get to working temp ??
And what are ya hammerin ???
4:12 am
NWBA Member
January 9, 2011
Offline
I have to finish the lining and I have another stainless steel flare coming by mail before firing the forge. I was going to try and make some lantern hooks and the trivet featured in the hot iron news.
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