[AT] Under pressure...

[Grant Brians]

Air being compressed gets hot fastest in small spaces, so I think you might
get this idea to work nicely both to reduce the immediate pressure buildup
and the heat on the tube. Let us know how it works.
        Grant Brians
        Hollister California
----- Original Message ----- 
From: <robinson at svs.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Sunday, January 30, 2005 1:02 PM
Subject: Re:[AT] Under pressure...


> On 30 Jan 2005 at 13:55, H. L. Staples wrote:
>
> > Not sure what you mean by sweat type but here are charts giving ratings
for both
> > hard and soft copper.
> >
> >  http://makeashorterlink.com/?N28732C5A
>
>
>
>
> Thanks H.L.
>
> Sweat type is what you use in the summer and it makes you sweat...   ;-)
>
> I just normally use compression or flare fittings on the small soft stuff
and
> sweat solder the bigger stuff. I tend to think of the soft in a coil for
flare
> fittings. I'm not sure the hard will flare right. I never tried any.
> What I am looking at right now is my air compressor has a section of 1/2"
hard
> copper about 16" (guess) long between the compressor and the check valve
which
> is mounted on the tank. In the winter it has a bit of trouble starting
when
> there is pressure in the tank. It has an unloader valve on the compressor
but
> the pressure in the copper line comes up before the motor gets up to speed
and
> the motor strains (or stalls if it is really cold). I have been thinking
of
> putting a bigger diameter section (maybe 1 1/4") about 10" long in the
line to
> the tank which could act as a little tank so that the air has more room to
go
> before it gets up to tank pressure. Picture a snake that swallowed a big
rat.
> :-)
> I had considered brazing some steel fittings into a 1# propane tank but it
> occurred to me that maybe I could get enough space by just using some
reducing
> couplings and a piece of larger pipe silver soldered together. I don't
think I
> would trust soft solder since that tube gets hot enough to burn your hand.
> This compressor has a single voltage motor and uses several capacitors for
> starting. I have it wired heavy on a dedicated line and it is fine except
in
> cold weather.
> My next one will be 220V. I can't complain, I have had this one maybe 16
> years.
>
>
> -- 
> "farmer", Esquire
> At Hewick Midwest
>       Wealth beyond belief, just no money...
>
> Paternal Robinson's here by way of Norway (Clan Gunn), Scottish Highlands,
> Cleasby Yorkshire England, Virginia, Kentucky then Indiana.
>
>
> Francis Robinson
> Central Indiana USA
> robinson at svs.net
>
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