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Safety -- Make sure you are safe!

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  #1  
Old 2011-10-16, 10:12am
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Dragonharper Dragonharper is offline
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Default Removing Low pressure gauge

I'm attempting to replace the low pressure gauge on my Oxy regulator with one that is in a better PSI range. However, I am unable to get it to budge. Any suggestions? I'm using a 12" crescent wrench and a 6" bench vise.
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Unless it is glowing and drippy, hot glass looks like cold glass.

Last edited by Dragonharper; 2011-10-16 at 10:15am.
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  #2  
Old 2011-10-16, 10:23am
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cheng076 cheng076 is offline
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Sounds like it was assembled dry, no teflon tape or whatever. You could try gently heating the area with a hair dryer but I would not reccommend anything hotter. You could try cocacola; it has worked for me before. Or a commercial liquid wrench product, but be aware it is a petroleum product and will require a very thorough cleaning before reassembly. Good luck

One other thing you could try that has worked foe me is to put a strain on the guage with the wrench and holding the strain gently tap on the wrench near the jaws just to set up vibrations; it may break it loose.

As an alternative since the low pressure guage is measuring the same pressure as in the hose, why not just 'T' in another guage in the hose near the regulator? You'll get a good reading and not destroy your regulator. All you need is a 'T' and 2 hose barb fittings and 2 hose clamps.

Last edited by cheng076; 2011-10-16 at 10:27am.
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  #3  
Old 2011-10-16, 11:04am
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Dragonharper Dragonharper is offline
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Quote:
Originally Posted by cheng076 View Post
...
As an alternative since the low pressure guage is measuring the same pressure as in the hose, why not just 'T' in another guage in the hose near the regulator? You'll get a good reading and not destroy your regulator. All you need is a 'T' and 2 hose barb fittings and 2 hose clamps.
I hadn't thought of that. And yes it was assembled dry, no tape at all anywhere. The low pressure gauge goes to 200 PSI! I'm not even sure if my hoses would handle that. And what would I cut with that 6" steel?
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Old 2011-10-17, 11:10am
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cheng076 cheng076 is offline
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Roy,
LOL... There are processes that use oxy pressures going toward there. Typically a guage is sized to read mid-scale when in use but often are wider to accomodate a wide range of uses. I have cut 4" steel plate but used only 35 psi oxy. There comes a point where the higher pressure causes too much turbulence and special torches/tips are required.

I run my oxy pressure here at 50psi for the Mirage and the Kabuki. Some people run even higher.
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  #5  
Old 2011-10-17, 12:21pm
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50 psi would probably blow the seals in my Bravo. For what I paid for the set I'm not going to worry about replacing it, I'll just add a tee in my line some where. I had to replace the low pressure gauge on the fuel regulator as the wind pulled some stuff over on my LP tank and bashed the gauge about a week after I bought them.
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Old 2011-10-17, 1:22pm
LarryC LarryC is offline
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50 psi would probably blow the seals in my Bravo.
Really? Is there a warning in the documentation? I also run 50 PSI oxy and 10 PSI Propane for my Mirage. I believe that this is what GTT suggests these 2 stages.
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Old 2011-10-17, 4:53pm
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Yes there is a warning. Bethlehem states in the user manual not to exceed 25psi on any gas input. It is designed as a low pressure torch, I find that it works best at 3-5 psi fuel and around 1o psi oxy.
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