[Jewelry making - Article 00251] - Re: [Orchid] Problems with smith torch regulator

[The Doctor]

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>     Also despite tightening the connection from regulator to acetylene
>     tank, we still get a leak. My husband thinks teflon tape is
>     frequently used for this. 

    This is a common misconception. Teflon tape, as any hydraulics
    mechanic with training will tell you, is used to keep two threaded
    metal pieces (especially, but not exclusively, dissimilar metals)
    from corroding or rusting tight, not to seal them. Teflon tape does
    very little to seal threaded fixtures (whether hydraulic or gas -
    threads are threads) and is definitely not recommended for gas lines
    of any kind, since tiny pieces may break off and clog your torch. If
    you can't get a tight enough connection without leaks, the connector
    or tank fitting is defective. 

    First, make sure your regulator is screwed into the tank fitting
    very tightly. Then, make sure your torch hoses are also tight. Very
    tight. Then, screw the regulator adjuster counterclockwise until it
    turns very easily. If you unscrew it completely, don't worry; just
    screw it back in a couple of turns right away. Next, open the knob on
    the top of the gas tank all the way. Make sure your torch knobs are
    closed, then screw the regulator adjuster clockwise until the gauge
    on the left side begins to show pressure. This should start to happen
    just after you feel resistance from the spring inside the adjuster
    mechanism. If you don't see the needle rise at this point, close the
    knob on the top of the tank, open the knob on the torch and send the
    defective regulator back for replacement or repair. 

James S. Duncan, G.G.
James in SoFL
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