How To Building a Venturi Burner for $21

[J. Keeton]

So last year I built a blown forge (thanks for all the help from the community with this build!). The process was documented in this thread: https://www.bladeforums.com/threads/forced-air-burner-forge-build.1584591/

I've been having issues over the last few months when heat treating. The blown burner running at 1/2 psi was still bringing my knives over critical faster than I would like. Even while using a muffle pipe with the forge doors open.

So this prompted me to find a smaller burner for my forge. I hit the internet for research and found a construction method that I felt was simple to duplicate easily. I settled on the Frosty-T burner.

Here are his plans: http://www.blacksmither.com/wp-content/uploads/2015/10/T-Burner-Directions-finished-1.pdf

Happily this burner has solved my problem. With this little 3/4'' burner and a muffle pipe I have much more control.

I wanted to post the exact item list and an instructional video for anyone who is looking to build a venturi burner in the near future. I found that ordering the items online was cheaper than my local big box hardware store. Total cost for me to build this burner with the fitting I wanted was $21. You could get away with a 3/8 flare to 1/8 MPT and build it for around $16.

Supply List:

1x1x3/4 Tee - https://www.supplyhouse.com/Bluefin-BLT100-100-075-1-x-1-x-3-4-Black-Reducing-Tee

3/4 x 6 Nipple - https://www.supplyhouse.com/Bluefin-BLN075-600-3-4-x-6-Black-Nipple

3/4 Merchant Couple - https://www.supplyhouse.com/Bluefin-BLMC075-3-4-Black-Steel-Merchant-Coupling

3/8 Flare x 1/4 MPT - https://www.supplyhouse.com/Jones-Stephens-F40-068-48-64-3-8-Flare-x-1-4-MIP-Brass-Half-Union

1/4 Flare x 1/8 MPT Union - https://www.supplyhouse.com/Jones-Stephens-F40-063-48-42-1-4-Flare-x-1-8-MIP-Brass-Half-Union

1/4 Flare Swivel - https://www.supplyhouse.com/Jones-Stephens-F40-125-70-4-1-4-Brass-Female-Flare-Swivel

1/4 Flare x 1/4 FPT Elbow - https://www.supplyhouse.com/Jones-Stephens-F40-104-50-44-1-4-Flare-x-1-4-FIP-Brass-Elbow

Mig Tip (0.030) - https://www.amazon.com/Hobart-77017...0.030+mig+tip&qid=1553819672&s=gateway&sr=8-8

1x3/4 Reducer (optional) - https://www.supplyhouse.com/Merit-Brass-K412-1612-T304-1-x-3-4-Stainless-Steel-Reducer-Coupling

Cheers,
JK

 

[A.McPherson]

Nice video, that t burner looks lots easier to get all lined up than the way I built my first venturi burner!

I’ve since switched to a blown burner, and while it is a bit more challenging to get it down low, I can get my forge to run at just above 1300f.

I do have a smaller forge that I think I’ll get one of these set up for general forging! Thanks again!

 

[Stacy E. Apelt - Bladesmith]

Really nice video and thread . I will add this to the sticky on burners.

 

[J. Keeton]

Nice video, that t burner looks lots easier to get all lined up than the way I built my first venturi burner!
I’ve since switched to a blown burner, and while it is a bit more challenging to get it down low, I can get my forge to run at just above 1300f.
I do have a smaller forge that I think I’ll get one of these set up for general forging! Thanks again!

Nice! That's cool with your forced air. I'm thinking my blower may just be too beefy to get lower? Maybe I can set up a "Y" fitting with a relief gate valve to cut down my blower power and get to lower temps.

Let us know how it turns out!

Really nice video and thread . I will add this to the sticky on burners.

Thanks Stacy!

 

[A.McPherson]

To reach lower temps I have to almost shut the gate valve I have between the blower and the forge, and I have to nearly close the needle valve that supplies the gas.

The silly thing is barely on at that point, but it works so I can’t argue with it too much!