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Author Topic: Gas Jet Sizes  (Read 2787 times)

kiwimodeller

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Gas Jet Sizes
« on: August 31, 2016, 10:22:51 am »

Greetings, can somebody please explain the differing sizes available of jets with 1 BA thread. In times past I have had jets from commercial suppliers such as Maccsteam which were marked 10 and 16 but now there seems to be only sizes 5 and 8 available. Somewhere in the back of my head I have a vague recollection of seeing a post about the numbers being changed but the sizes staying the same but the mighty Mayhem search does not seem to want to help tonight. All enlightenment welcome. Thanks, Ian.
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boatmadman

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Re: Gas Jet Sizes
« Reply #1 on: August 31, 2016, 08:01:20 pm »

I dont know about number changes, but I have no's 3,5,and 8, all on 1 ba thread.


Basically, the bigger the number, the hotter the flame and higher gas consumption


See here:


http://www.ebay.co.uk/itm/PARTS-NEW-NO-3-GAS-JET-1BA-THREAD-FOR-MOST-BURNER-APPLICATIONS-LIVE-STEAM-/311537193944
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if at first you dont succeed.....have a beer.....

BarryM

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Re: Gas Jet Sizes
« Reply #2 on: September 13, 2016, 04:22:00 pm »

Stuart Models sell No.6
BM
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KBIO

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Re: Gas Jet Sizes
« Reply #3 on: September 15, 2016, 06:49:43 pm »

Hello!
Maybe this can help a bit.
You can have a look here and if you have some information to supply, I would appreciate:
Gicleurs gaz et équivalence British.


The thread can be anyting to fit your burner.
Same for the burner, I do not buy anything but build my own, now. A lot more performing.


Also, thanks to the chart, I use a guitar string depending on the size jet (rate) I need.
Guitars strings are helpful.
Cheers. ok2

hammer

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Re: Gas Jet Sizes
« Reply #4 on: September 15, 2016, 08:05:23 pm »

Thanks to boatmadman, for the link to number 3 gas jets. I had give up searching for this small size, about a year ago, they seamed to be unavailable. My boiler design was for number 3s.  I am using number 5s at present & the flame tends to blow right through the fire tube, burning at the top of the funnel. I have made a gas pressure regulator but this is only part successful. I have placed an order.
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