Not chip making - but it involves a metal valve ;-)
Those of you familiar with Coleman gas lanterns - there's a gray-black cylindrical packing material in the main fuel valve that keeps the gas from leaking when the stem is turned. It looks like graphite embedded into something. What is this made of? They're inexpensive enough, but what could you substitute if you needed a replacement and couldn't wait for parts? Remember, this is heated gasoline / naptha that this seal is holding back. Over on the Coleman group, someone suggested graphite impregnated packing thread as used in old plumbing fixtures, but when I looked at a roll of this, it was so fluffy (like yarn with graphite powder) that it just didn't look like it would hold back a liquid. Would this have worked or is there something else that would be a better solution? The plumbing supply didn't have any high temp teflon packing thread, so I don't know what that looks like.
RWL
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