[AT] Under pressure...

[robinson at svs.net]

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