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Hi Guys - glad you are still hanging on in here George - this is not to disagree with you but I was surprised to hear you think this is down to too much air. I was under the impression that the yellow flame was due to lack of oxygen for the given jet size/primary air hole size. I will make an adjustable sleeve as you suggest however and try. The jet holder is adjustable but the positioning of this seems to be having very little effect on the flame. Pushed right in it protrudes about half way across the holes which softens the flame slightly and increases the yellow. With the jet well back from the holes the blue intensifies slightly and the yellow reduces more so.At this stage until I can fit smaller jets I can't do much to reduce the volume of gas flowing but I will try your suggestion and take pics of the results.Thanks again for looking inRegards - Ramon
Hi Guys - Some good news - things have improved somewhat though not quite as anticipated.This is before I saw Georges post ....Okay first off I fitted a slide cover as suggested and pushed the jet forwards leaving the air holes fully open. Fired it up and set the gas to give a flame about 5-6" high - still yellowish and not 'fierce'Then I closed off the holes gradually until near closed. As expected this turned the flame much softer and it became very yellow and smoky - as Eric says - lack of oxyThen I pulled the slider back and pulled the jet out as far as it could go. Noticeable difference in sound coming from the jet and a flame very much looking like something that I imagine is requiredWith the lights out the flame pattern could be seen better - the ceramic glowing evenly all over on its high pointsThis looks much more yellow/orange in the image than in reality - the flame is also holding its shape betterLast thing was to hold a steel rod in there to see if the heat was even across the area. I know it looks as if it's on the edge of the flame but that's due to the camera angle - it's actually right across the middle of the flame.But why would that be like that tonight ? - I had after all tried with the jet pulled right out on the previous attempt Well the only thing I can think of at this stage is that tonight I left the burner in it's mounting ring - perhaps that prevented air being drawn in from around the flame? Whatever - I shall still pursue the smaller jet size - it seems to guzzle the gas I think however I'm now on the right track so thanks again for interestRegards - Ramon
Thanks for that George - so keen was I to see what would transpire I did not consider that setting fire to myself was a distinct possibility - Hmmm that does seem to be a characteristic of mine - not thinking ? or setting fire to myself? - well you'll have to decide guys Seriously - thanks George Now, what about that flame then Regards - Ramon
Hi Ramon,I assume, (makes an ass out of u & me), that in the boiler furnace tube your burner will be mounted at 900 to your test burns in the open. Somehow this seems at odds with the ceramics and may need some kind of forced/induced draft to get the flame more horizontal.The type of burner shown for a Yarrow boiler may be more appropriate and can be sized to slide into the furnace. This rectangular shaped burner is in many ways similar to a bed of coal on a grate.Just my 1 bob's worthBest RegardsBob