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[TCML] Re: Tar

Good point Tony.  I wan't thinking of the contamination aspect. 
Russell


Message: 6
Date: Thu, 22 Jan 2009 09:27:19 EST
From: Sfxneon@xxxxxxx
Subject: Re: [TCML] Re: Tar
To: tesla@xxxxxxxxxx
Message-ID: <cac.489f12ab.36a9dc47@xxxxxxx>
Content-Type: text/plain; charset="US-ASCII"

Bob,
 
If you pull a vacuum in the transformer can, be sure it is strong enough 
to 
withstand the difference in pressure. Atmospheric pressure will crush even 
a 
round steel 55 gallon drum if a vacuum is created inside. There is a  ton 
(literally) of pressure on each square foot with only 14 PSI pressure 
difference, 
so be careful you don't implode the transformer can.
 
I also seriously doubt that any sign shop would try to evacuate a 
transformer can with their pumping system. That's not what it was designed 
to  do. I 
wouldn't want to risk contamination of my pumping system with oil vapor or 
 the 
possibility of sucking oil into the manifold. 
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