Does anyone use flashback arrestors on a similar setup. Which one
do you have. Do they fit on the torch or onto the regulators. Any
I use the Oxy/Acetylene version of the Smith Little torch and have
flashback arrestors on both fuel and oxygen. The arrestors go between
the gauge (or regulator) and the torch hose. No torch set I have ever
bought came with arrestors I've always had to purchase them as
add-ons. My setup consists of the regular gage set, which outputs to
a Y valve. One side of the Y is a regular Victor Torch for a rose
bud, the other side of the Y is the Smith Little Torch. The Victor
side of my setup has flash arrestors, the Smith side has check
valves. With the flash arrestor I had a real hard time getting the
small tip to work on the Smith and that was the reason I went with a
Y valve and check valves for the Smith side I did not have to buy
two setups and I could get both torches to live in harmony with only
one set of regulators and bottles.
I do not know what the pressure is from the propane bottle
regulator. I would call Smith and ask which they would recommend. It
is also possible they may have a check valve built into the
There are two types really, a flashback arrestor and a check valve.
The flashback arrestor requires more pressure to function in the
forward direction and it has a check valve built in. The 2 I use are
made by Western Enterprises, flash arrestors Model FA-100 for oxygen
and FA-200 for acetylene. The check valve may be more applicable to
your need, they operate at a very low pressure and will prevent the
higher pressure from pushing back into the lower pressured bottle,
the check valves are fully closed at neutral pressure. The oxygen
part number is CV-7R and CV-8L for fuel, both the arrestor and check
valves are made by the same company. There was no particular reason
for picking this brand as opposed to say Victor, Forney, Harris or
Arco, they are just what the welding shop had in stock.
If you would like I can take a picture and send it to you. While it
is not exactly like yours it will show the position of the safety
devices in relationship to the regulator and hoses.
Hope this helps.