Correct flashback arrester

[Roholmes]

Hi can enyone help my find the correct flashback arresters for my oxygen and propane set up as I have brought one but it does not have an high enough pressure for my little smiths torch as the arrester only goes up to 5 bar in propane and need to be able to have a arrester that will go up to at least 10 bars but can not find one at all

[china]

Little torch does not operate anything like 10 bar more like 3-4 Bar

[Roholmes]

Little torch does not operate anything like 10 bar more like 3-4 Bar

The torch instructions say you need 5-9 bars for different tips on the manual for propane

[ps_bond]

I've just read through the instructions from Smiths and can find no reference to 5-9 bar. All I've seen is 13.7 - 48.3kPa (for both O2 & fuel - although there's a later reference to 55.2kPa for the #7 tip) across the range of single & dual tips.
5bar supplying even a Sievert and you'll struggle to get & keep it lit.

http://www.smithequipment.com/files/pdf/resources/o263357a_mil.pdf

[Aurarius]

Yes, for tip numbers 2 to 7 the psi range is 2 to 8.
8 psi is significantly less than one bar.

One of the reasons I got the following regulator is that you can see roughly what pressure the fuel is running at:
http://www.rapidwelding.com/dynamic/DisplayItem.aspx?c=H1384&zl=2

[Roholmes]

[QUOTE=Aurarius;94634]Yes, for tip numbers 2 to 7 the psi range is 2 to 8.
8 psi is significantly less than one bar.

One of the reasons I got the following regulator is that you can see roughly what pressure the fuel is

Thank you I have been looking for one like this for ages but I've already got one but it doesn't have a gauge but when I get some more money I'll defiantly invest in this one :) already waisted money on one that didn't fit so can't afford to buy another one :(

[china]

Flashback arrester and regulator are two different items, however (I can't speak for U.K.) in Australia they are both readily available for the little torch
and are not the same as used with most gas welding kits, they go down to lower psi/kpa, I would also tend not to buy one in Bar measurement as your little torch manual does not give that.

[Roholmes]

Flashback arrester and regulator are two different items, however (I can't speak for U.K.) in Australia they are both readily available for the little torch
and are not the same as used with most gas welding kits, they go down to lower psi/kpa, I would also tend not to buy one in Bar measurement as your little torch manual does not give that.

I have both flashback and regulators for both gasses and the one for the propane has a rough guid for PSI so hopefully I can play around with it and get it right :) obviously now I know what the numbers mean I can get the right pressures for the torch :) thank you for your help :) as being someone new to all this and have no exsperiance with anything to do with a oxy/fuel torch it's good to have some help on the way. :)

[Aurarius]

Flashback arrester and regulator are two different items
Did someone suggest otherwise?


(I can't speak for U.K.) in Australia they are both readily available for the little torch
and are not the same as used with most gas welding kits, they go down to lower psi/kpa,
I'd be interested to see an image of the regulator. The only ones I know of that are made for the Little torch are for the bernzomatic style gas cylinders, as used by plumbers (and low-volume jewelry makers). Do they do another kind?

[china]

I made that post as as I thought there may have been some confusion, posting pic of the regulator will serve no purpose as it looks just like a normal welding regulator however they are constructed to a higher tolerance to be able to give stable operation at the low pressure required by the little torch, I can post a image if you want

[Aurarius]

posting pic of the regulator will serve no purpose as it looks just like a normal welding regulatorBut presumably, if they're designed to operate at lower outlet pressures, a more generous portion of the circumference of the dial will be occupied by the pressure range Little torches are generally run at, i.e. 2-8 psi. 2-8 psi on the dial on the regulator I've got (the one in the link) occupies only about an eighth of the dial's circumference, so gauging what outlet pressure you're running a Little torch at isn't as accurate as I'd like it to be.


I can post a image if you want
Yes please.

[china]

Here is a pic of LPG gauge 10221 Plus some dead bugs in the door sill

[Aurarius]

Thanks for that. The dial does seem slightly better than mine in covering a smaller pressure range.

The best propane regulator for our use I've found (it only goes up to 15 psi) after doing a bit of a search is made by Smiths themselves, but afaik it's only available in the US and with US fittings:
https://www.riogrande.com/Product/Smith-Single-Stage-Propane-MAPP--Regulator/500133

I've made some inquiries with UK firms today and none of them can suggest a similar regulator available in the UK. If anyone knows of one, I'd be very interested to have the details.

[china]

This is the company in Australia that supplies them, I have no idea if it is viable to have them sent to the UK
http://www.nichegas.com.au/mini-torch-c-2_47.html?page=2&sort=2a&osCsid=2b6ml7fcv565sble3q4e00ofd6