My new Harris O/A setup has the regulated oxygen guage scaled to 150 PSI.

Not much resolution when I am trying to set Oxy to 3-5 PSI "per the
book" for small stuff. None of the charts the vendor gave me show a Oxy
PSI above 60, most far below that.

Is it common to change out the Oxy regulated pressure guage for
something scaled lower ?

thx,
FF

No expert here, but not too common, AFAICT, due to general phobias bout O/A.

What I would do is put in a T, and some hose connected to a regular air
"quick connect", put the male fitting on the lower-pressure gauge, and snap
it on whenever I needed it. This way the stock gauge is always there, and
if you will be using the O/A 'traditionally" you can just pop off the small
gauge.

Or T up the small gauge permanently, w/ it's own little ballvalve.

Mebbe some safety stuff I'm omitting. But, I've made it this far...
----------------------------
Mr. P.V.'d
formerly Droll Troll
"Flash" wrote in message
news:ODWUd.51209$EL5.44382@trnddc05...
My new Harris O/A setup has the regulated oxygen guage scaled to 150 PSI.

Not much resolution when I am trying to set Oxy to 3-5 PSI "per the book"
for small stuff. None of the charts the vendor gave me show a Oxy PSI
above 60, most far below that.

Is it common to change out the Oxy regulated pressure guage for something
scaled lower ?

thx,
FF

Flash wrote:
My new Harris O/A setup has the regulated oxygen guage scaled to 150 PSI.

Not much resolution when I am trying to set Oxy to 3-5 PSI "per the
book" for small stuff. None of the charts the vendor gave me show a Oxy
PSI above 60, most far below that.

Is it common to change out the Oxy regulated pressure guage for
something scaled lower ?

thx,
FF

Maybe your gauge is showing the TANK pressure and not the OUTLET pressure? - GWE

In article ODWUd.51209$EL5.44382@trnddc05, Flash says...

My new Harris O/A setup has the regulated oxygen guage scaled to 150 PSI.

Not much resolution when I am trying to set Oxy to 3-5 PSI "per the
book" for small stuff. None of the charts the vendor gave me show a Oxy
PSI above 60, most far below that.

Is it common to change out the Oxy regulated pressure guage for
something scaled lower ?

I've always seen those gages at 60 psi on the O2 regulator, but
even *those* don't read very well below 10, no mechanical gage
like that reads well on the last tic mark, really.

I like to have a 30 psi gage, I don't do any cutting with the rig.

Jim


--
==================================================
please reply to:
JRR(zero) at pkmfgvm4 (dot) vnet (dot) ibm (dot) com
==================================================

"Grant Erwin" wrote in message
...
Maybe your (150psi) gauge is showing the TANK pressure and not the OUTLET
pressure? - GWE

Nope... 2000 psi wouldn't be outta line. An unregulated oxygen tank would
blow the Bourdon tube in a 150psi gauge.

LLoyd

I'm not an expert, but I do have an O/A rig. I don't think it matters
much. The final adjustment is done at the torch handle. All the
regulator does is drops the pressure down to a small pressure and
maintains it there. The valve on the torch needs a constant pressure to
work consistently.

I would guess that the regulator will control the pressure between 0
(more or less) and 100 psi. This guess is based on the 150 psi gauge.
If the manufacture puts a 60 psi gauge on a 100 psi regulator, then most
people will end up destroying them and demanding a new one.

Vince



Flash wrote:

My new Harris O/A setup has the regulated oxygen guage scaled to 150 PSI.

Not much resolution when I am trying to set Oxy to 3-5 PSI "per the
book" for small stuff. None of the charts the vendor gave me show a
Oxy PSI above 60, most far below that.

Is it common to change out the Oxy regulated pressure guage for
something scaled lower ?

thx,
FF

"Gene Kearns" It really doesn't matter. Set the Oxygen about where you
think 5 PSI is and you'll be fine. (clip)
^^^^^^^^^^^^^^^^^
The low pressure gauge doesn't really give you useful readings until you get
up to cutting pressures. I think most people just watch the needle move up
a little, so they know they have gone past the free travel of the regulator
setting.

I was taught by a very good welder, who recommended lighting the torch, and
then using the regulators to balance the flame. You can then "fine tune"
using the torch valves, and the flame is very stable. I like that method.
Trying to adjust the torch from recommended settings, using the pressure
gages, doesn't work for me.

On Tue, 01 Mar 2005 09:31:26 GMT, Flash
wrote:

My new Harris O/A setup has the regulated oxygen guage scaled to 150 PSI.

Not much resolution when I am trying to set Oxy to 3-5 PSI "per the
book" for small stuff. None of the charts the vendor gave me show a Oxy
PSI above 60, most far below that.

Is it common to change out the Oxy regulated pressure guage for
something scaled lower ?

You can change the gauge, but be SURE to get a new Oxygen-rated and
cleaned gauge, and use only approved thread sealants (if any). When
in doubt, take the regulator in to a welding supply and let a trained
technician do it for you.

Pure Oxygen reacts rather violently if it comes in contact with any
oils or greases and many other chemicals (up to and including going
BOOM! and starting big fires if the cylinder starts venting) and you
REALLY don't want to be in the area when it does.

-- Bruce --
--
Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop
Electrician for Westend Electric - CA726700
5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545
Spamtrapped address: Remove the python and the invalid, and use a net.