[Jewelry making - Article 00086] - Re: [Orchid] Old Wax injector

[Jeff Demand]

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Jeanne,

    On my larger injector the top has 2 threaded holes. One holds the
    pressure regulator and gauge, the other an over pressure relief
    valve. The relief valve can also be used manually, though most
    regulators will automatically vent when turned down. Safety feature,
    a very good idea but not absolutely necessary. My little injector
    doesn't have one... I'm not sure whether to fear the 'safety police
    folks' or the possibility of a sky light in my basement studio. You
    should be able to purchase the relief valve or steal one off of a
    garage sale pressure cooker. Just a needle valve with a spring or
    weight. If any of this doesn't make sense just buy a relief valve,
    I've been living on the edge for far longer than actuarial tables
    recommend, but have learned where the edge should be. 

Jeff
Demand Designs
http://www.gmavt.net/~jdemand
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