Disposable oxygen cylinder valve

[John Fields]

Hello,

I've got a little BernzOmatic oxygen-propane/mapp gas torch that's
designed to screw onto disposable bottles (the regulators and tank
connectors are fitted to the ends of the hoses) and I want to
convert it to air-propane.

No problem with the propane end, everything fits on the cylinders I
have perfectly and the valve works just like it's supposed to.

The oxygen end is another story, however.

What I need is a fitting/adapter the regulator on the O2 hose can
screw on to, just like the one on the cylinder, but after extensive
searching it seems to be unobtainium.

If push comes to shove I can hack an old cylinder and get the valve
that way, or turn the cylinder into an accumulator, but I'd rather
start with a new valve if I can.

AFAIK the valve is a CGA 601, and the threads on it are left-handed
external 1"-20.

Can anyone help?

Thanks,
John Fields

[Martin Eastburn]

I'd go to a Welding supply and see if they have something.

They might have bottles of air - cheap - or hose or connectors.

Or a propane supplier that sells to welders - needing the same.

Keep us posted - I have the same unit but don't use it much -
I have a bottle of O2 and 30 gallons of propane and a welding torch
handle that is rated for propane. :-)

The big bottle of propane was for my furnace - has a high flow nozzle.

Martin

[Jon Danniken]

No idea for helping, other than to mention that I tried it once without
any success (the air just blew the flame out). I just figured it was
set up for oxy and wouldn't work with air, and didn't pursue it any
farther.

If you have better success I would enjoy seeing it, or if not, that too.
Those little torches are neat for small jobs, and I've always thought
it would be handy to find a way to adapt a disposable oxygen cylinder to
the fitting (other than with tubing and hose clamps).

Jon

[John Fields]

On Sun, 23 Feb 2014 16:36:33 -0800, Jon Danniken
<jonSPAM...@yaSMPAhoo.com> wrote:

>On 02/18/2014 07:46 AM, John Fields wrote:
>> Hello,
>>
>> I've got a little BernzOmatic oxygen-propane/mapp gas torch that's
>> designed to screw onto disposable bottles (the regulators and tank
>> connectors are fitted to the ends of the hoses) and I want to
>> convert it to air-propane.
>>
>> No problem with the propane end, everything fits on the cylinders I
>> have perfectly and the valve works just like it's supposed to.
>>
>> The oxygen end is another story, however.
>>
>> What I need is a fitting/adapter the regulator on the O2 hose can
>> screw on to, just like the one on the cylinder, but after extensive
>> searching it seems to be unobtainium.
>>
>> If push comes to shove I can hack an old cylinder and get the valve
>> that way, or turn the cylinder into an accumulator, but I'd rather
>> start with a new valve if I can.
>>
>> AFAIK the valve is a CGA 601, and the threads on it are left-handed
>> external 1"-20.
>>
>> Can anyone help?
>
>No idea for helping, other than to mention that I tried it once without
>any success (the air just blew the flame out). I just figured it was
>set up for oxy and wouldn't work with air, and didn't pursue it any
>farther.

---
I tried it with a low-pressure air source (a shop-vac exhaust
feeding the oxy regulator) and got more or less the same results you
did with anything other than a small flame.

In any case, the flame left the end of the torch, was burning in
free air, and was pretty uncontrollable.
---

>If you have better success I would enjoy seeing it, or if not, that too.
> Those little torches are neat for small jobs, and I've always thought
>it would be handy to find a way to adapt a disposable oxygen cylinder to
>the fitting (other than with tubing and hose clamps).
>
>Jon

---

The problem I had wasn't with getting the O2 regulator to fit on to
a disposable oxygen cylinder - since that's what it was designed for
- it was with getting a fitting with one end which would screw into
the O2 regulator and the other end capable of connecting to an air
source. The air source end isn't a problem, but after hours of
searching and emailing I still haven't found a source for a fitting
which will screw on to the regulator. It needs to be female, and
left-hand threaded 1"20.

So far it looks like I'm going to have to fit the cylinder itself
with a fitting to connect to the air source, and use the existing
fitting on the cylinder to connect to the regulator.

Assuming that solves the connecting-to-air problem, I'm still left
with a torch which was designed for propane/MAPP gas - oxygen, so it
looks like I'm left with the task of designing (or finding) a proper
tip for the torch to give me the small, pin-point flame I'm looking
for.

In the end though, it'd probably be more effective, safer, and a lot
easier, to cut the existing regulator off of the oxygen hose, fit it
to connect to a conventional oxygen tank and regulator, and keep the
torch propane-oxygen.

John Fields

[Jamie]

replying to John Fields , Jamie wrote:

Hey, did you ever find a CGA 601 adapter, or did you have to weld a hose
connector to your empty oxygen bottle? I'd like to connect my full-size
oxygen tank to my small oxy mapp torch too.

--
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