FYI about defoamers:

Cannot fathom using "soft soap", which would form insoluble compounds with water hardness, thus be non-rinsing, when rinsing these devices we try so hard to clean up.

Whereas polyglycols have the highly desirable property of being insoluble at higher temperatures, and soluble at lower temperatures, thus allowing them to be rinsed in cold water.

Rudy Sedlak
RD Chemical Company

--- On Thu, 3/12/09, Brian Ellis <[log in to unmask]> wrote:
From: Brian Ellis <[log in to unmask]>
Subject: Re: [TN] Water tank foaming inhibitor
To: [log in to unmask]
Date: Thursday, March 12, 2009, 8:44 AM

The purpose of an anti-foam is to change the physical conditions of the water in
the tank, especially the surface tension. Many anti-foam products are based on
mixtures of soft soap and octylic alcohol. These are perfectly acceptable for
electronics applications. On the other hand, those based on silicones should be
viewed with the utmost caution.

Brian

Ioan Tempea wrote:
> Dear Technos,
>  Anyone familiar with a substance from Dow Chemical, or any other, that
would inhibit foaming in the wash tank of the in-line aqueous wash machines? I
would appreciate the product name and eventually part#!
>  Of course, any pros and cons (does it contaminate) would also be
appreciated.
>  Thanks,
>  Ioan Tempea, ing.
> Ingénieur Principal Fabrication / Sr. Manufacturing Engineer  30 ans
déjà! - Already 30 years!
> 950 rue Bergar, Laval, Québec, H7L 5A1
> t : 450-967-7100 ext : 244
> Mtl : 514-990-5762
> f : 450-967-7444
> [log in to unmask]
> www.digico.cc <http://www.digico.cc/> P N'imprimer que si
nécessaire - Print only if you must
>  
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