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Posted by BobH on December 18, 2008, 12:10 am
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Ignoramus8138 wrote:
> Also, note that the entire assembly should be able to withstand full
> tank pressure. Go to McMaster-Carr for properly rated hardware.
>
> i
The Swagelock and Parker stuff certainly would be rated for full
cylinder pressure, and I would be pretty surprised if the gas dealer did
not carry fittings rated for cylinder pressure. 2500 PSI is not that big
of a problem for brass fittings.
The T after the regulator with a pair of flowmeters and needle valves is
certainly worth trying. It would be less expensive. My only concern on
that path would be whether the regulator could handle the vloume well
enough to keep the flow stable on the torch with the variability on the
purge line.
BobH
>
>> Chris Wilson wrote:
>>> I want to be able to internally purge stainless pipe fabrications, but
>>> can't justify hiring two full size bottles. Can you buy an adaptor to
>>> run two regulators off one full size Argon mix bottle? One to run the
>>> TIG and one with seperate pressure control, to purge the fabrication? I
>>> am in the UK if anyone knows who sells such a thing. Thanks.
>> You should be able to make your own manifold. The standard configuration
>> for Argon regulators in the US is a CGA580 to 1/4" NPT pigtail coming
>> into the regulator. A good welding equipment supplier will have 1/4" NPT
>> T's, elbows, and nipples. Unscrew the CGA580 pigtail from your regulator
>> and screw it into the T. A pair of 1/4" NPT close nipples to a pair of
>> elbows followed by a pair of 1/4" NPT long nipples to the regulators and
>> you are good to go. Use pipe dope or teflon tape during assembly and
>> leak test with soapy water when done.
>>
>> If your gas supplier does not have these parts, Swagelock or
>> Parker Hanifin (sp?) will have them in brass or stainless. I would use
>> brass, assuming that your regulator bodies are brass.
>>
>>
>>
>> |----------- Regulator 1
>> close nipples -> |
>> |
>> CGA580 ------| <- T
>> |
>> |
>> elbows -> |----------- Regulator 2
>> ^
>> long nipples
>>
>>
>> Good Luck,
>> BobH
>
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> tank pressure. Go to McMaster-Carr for properly rated hardware.
>
> i