Gas Flashback

[Yummyrum]

I'm using a two ring banjo burner under my keg .When I used to use it on a standard Low pressure Reg ,it would occassionally flash back.

By that I mean the main burner rings would just make a pop and next thing,theres flames all around the air intake area.This Burner also doesn't like to operate unless there is a pot or something above the flame .You can't light it with nothing on it .

Keg 003.jpg

Yesterday I got an HP reg from HBS and thought I'd give this burner another crack .Same thing .Only if I run it only on the inner burner ,it doesn't do the flash back thing.

Is this common with these burners or do I just have a dud ?

Keg 004.jpg

[jim]

I used to get that. Now I lay a brick down between the air intake and the flame. Never get that problem with the brick in place.

[bt1]

Howdy,

Shite in jets or taps...it happens after a few years depending on where/how/conditions burner is stored.

take the jets out and give them a soak in metho or heads. Then make sure the jet is clean fuse wire or jet wire. If you have shite build up past the jet a stiff bottle brush will do it.
Take the taps out, take apart. Clean the shaft, body and gas feed path same way as before. Just make sure you have lock base washer in right way other wise taps will be 180 degree out.
I use a little mean very little thin smear of Vaseline on tap shaft to stop the taps binding. Don't over tighten taps other wise too hard to use.

Once re assembled wind your adjustable air plates out a little and re adjust so your getting enough air and will se it as clear flame with only the tips starting to turn orange.

bt1

[drunkmore]

:text-+1:
What couloir are the flames on the burner when it's running?

[Yummyrum]

Flames are blue but theres a far amount of yellow tip.Unless there is somerhing on it,the flames basically lift of and go out.

Am going to give it a clean and see how that goes.Thanks guys

[Yummyrum]

Pulled it apart and there was quite abit of shit in it .Put it bck together and tried it.

DOH still the same . Hey guys is it normal for these things not to work unless there is a pot on it to hold down the flames ?

Even on a Standard Reg,you can't light this thing uncovered .

[jim]

Have no problem lighting it in any condition.

[C2H6O]

I have a Bunnings 2 ring burner that looks similar to this.. Only used it a few times, but yes it works fine without anything on top. I usually light mine in the open then slide it under the keg.

[Yummyrum]

Thats what I thought you were going to say . My other little single ring burner lights piece of cake to ,so that's what made me wonder why this things such a dog .
All the holes are clear and free .I have a set of jet cleaning needles .

I'm starting to wonder why this was at the recycling centre :handgestures-thumbdown:

This is about as good as it gets .The Middle ring wont even burn ( will with a pot on it)
The air intake is almost closed tight

Keg 007.jpg

Open the air a little to clean up the flame and some jets start to die as the flame "lifts" off the burner

Keg 005.jpg

Add a bit more air and the flames almost gone .This is usually about the point where it flashes back and flames out the air intake

Keg 008.jpg

.

[jdonly1]

Thats what I thought you were going to say . My other little single ring burner lights piece of cake to ,so that's what made me wonder why this things such a dog .
All the holes are clear and free .I have a set of jet cleaning needles .

I'm starting to wonder why this was at the recycling centre :handgestures-thumbdown:

This is about as good as it gets .The Middle ring wont even burn ( will with a pot on it)
The air intake is almost closed tight

Keg 007.jpg

Open the air a little to clean up the flame and some jets start to die as the flame "lifts" off the burner

Keg 005.jpg

Add a bit more air and the flames almost gone .This is usually about the point where it flashes back and flames out the air intake

Keg 008.jpg

.

is that a pressure reg you have there,if so crank it up and watch your air control

[jim]

My outside ring does that as I crank up the gas. The inner two don't they just get bigger and hotter. I usually just run the inner two to heat up, since then I can crank up the reg to 120kPa or so, and actually get more heat out than I would running all three at a much lower gas rate.

[crow]

You've got some sort of air intake issue. Does it have screws or bolts to adjust the intake ?

[Yummyrum]

You've got some sort of air intake issue. Does it have screws or bolts to adjust the intake ?

If you look at the first blurry pic you can just make out a disc that spins on the threaded shaft that enters the cast air intake port.

[MacStill]

Maybe mrs Mac (the ol boiler) needs a bit more of an air restriction so she flashes back at me too :laughing-rolling:

[Dominator]

Maybe mrs Mac (the ol boiler) needs a bit more of an air restriction so she flashes back at me too :laughing-rolling:

:laughing-rolling: Nice one mac!

[bt1]

Yum,

If it's lifting the gas flames off and blowing out two things.

Slow gas flow down so you get all lit. Progressively open up gas taps once it starts to seriously lift off you'll know where the max flow it can handle is. Both my 2 & 3 ring do the same. I'm on a HP reg so had to "find" the sweet spot and then lock reg using lock nut to that possie.

It will vary slightly between new filled bottle and half empty...
the outside ring looks fine.. just setup inner on it's own then outer and adjust.

bt1

[SBB]

Ive had the odd problem with these burners at times too. A bit of maintenance can go a long way toward resolving problems. Rust seems to be one of the biggest enemies. Firstly make sure all the Gas holes in the burners are clean, if not run a small drill of the appropriate size through them. Then clean the jets, lastly give the whole affair a good blow out with compressed air. A lot of rust and other crud seems to build up inside them which cant be seen The compressed air will get rid of a lot of this.
Once you've done all this its a matter of fiddling with the air gas mixture to get the result you want. Ive seen standard 3 ring burners put out a huge amount of heat when coupled to a high pressure reg if they are clean and running right.

[Yummyrum]

Ive had the odd problem with these burners at times too. A bit of maintenance can go a long way toward resolving problems. Rust seems to be one of the biggest enemies. Firstly make sure all the Gas holes in the burners are clean, if not run a small drill of the appropriate size through them.

Thanks SBB .I have noticed that there is a lot of rust in the Gas holes.I actually thought about doing that when I cleaned the tap /jet assembly but couldn't find an appropriate bit .Will do it .

bt1, I may well be trying to push it too hard .

[Yummyrum]

Just stuck the drill through all the gas holes and wire brushed it and blow out.

seems to have majorly improved it . :handgestures-thumbupleft: Middle Ring still sucks but I recon I could get this thing cracking now on the outside ring alone.

cheers . Just got to get used to the air control ring .seems that I need to fiddle with it every time I change the gas flow .Likes to be for the most part almost choked off for best performance .Seems strange that for such a long thread that its only effective right at the closure point

[JayD]

Just stuck the drill through all the gas holes and wire brushed it and blow out.

seems to have majorly improved it . :handgestures-thumbupleft: Middle Ring still sucks but I recon I could get this thing cracking now on the outside ring alone.

cheers . Just got to get used to the air control ring .seems that I need to fiddle with it every time I change the gas flow .Likes to be for the most part almost choked off for best performance .Seems strange that for such a long thread that its only effective right at the closure point

it's ironic, at the point of no control comes fine control...you see this in so many activites in all types of hobbies... :-B