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3D3DArgon gas valve.
This is an ordinary high-pressure (up to three or four thousand PSI) gas regulator meant for gases other than oxygen. I use it on an argon cylinder, so I'm listing it under argon, but mainly it's here to illustrate the general concept of high pressure gas regulators.
Source: Claudin Welding Supply
Contributor: Theodore Gray
Acquired: 16 October, 2009
Text Updated: 18 October, 2009
Price: $40
Size: 8"
Purity: 0%