Converting a knackered silent burner into a regulated silent burner

This Primus silent burner was knackered: the tubes were blocked and the nipple seat threads were stripped. But other than that the burner was in decent condition.


So I decided to cut it open and unblock it, and then convert it into a regulated burner with a new jet.
This is how I did it.

First I cut and unblocked the burner, cutting the tubes just above the jet seat



Then I inserted a regulator barrel that I devised from measurements taken from an Optimus 111 burner (details further down).



The barrel has a drilled and threaded inside, and takes a normal Optimus 111 spindle, packing and fittings - except that the pinion teeth are ground off the spindle so the gas can pass easily from the inlet tube to the nipple












There is only one inlet for the gas into the regulator barrel, this feed come from the left hand tube in the photos. The right hand tube is redundant, and is used for support only.

Next the barrel (without nipple and fittings) was brazed in place using Silverflo 55 braze alloy and Easyflo flux.



and the fittings and nipple are fitted







New washer from @Spiritburner, and the burner is fitted on an old SVEA tank and works as it should from full throttle to simmer.




So, from scrap burner to regulated burner in an afternoon. I am very happy with this recycling project.

Regulator barrel internal details. The outside of the barrel has flats ground in a vee (visible in photo 6) so that it is cradled securely between the two long tubes. There is also a small flat ground on top of the nipple hole so that the nipple makes a gas tight seal.


I now have made three of these regulated burners. The two silents were from knackered burners.
The roarer burner was made completely from scratch and will be posted separately.

 

Excellent stuff!

 

Fantastic work.

 

now that is one good idea

 

@Twoberth Well done Duncan and bravo to whoever nominated your post to go into the Fettlers’ Master Class.

John

 

Thanks everyone.

 

Definately a worthy Master Class example.
Well done @Twoberth

 

@Twoberth.

We must thank You for shareing your
very good idea;s with us all, very well
described & illustrated. Best to you.
Optimust.

 

if i sent you one of me spear burners, how much to convert it, please

 

Amazing work there.

Si

 

@CRAZY CRAB Thanks for your request, but I don't intend to convert other peoples burners as I have too many other house and hobby projects to do. The conversion is not as hard as you may think. You don't need a lathe if you start with 1/2 inch brass bar, only normal workshop tools and the correct taps.

 

many thanks, no probs,

 

Thanks Harder, Big Si and Optimus.

 

Excellent fettle, well done
Has given me inspiration to try it on the biggest Liberty silent, will report back....

Alec.

 

Thanks Rangie. I look forward to your results.

 

This is EXACTLY why i joined up.

Love the diy approach to everything