We use Vetrel XMS plus in an Ultronix vapor cleaner. The cleaner was
designed for use with Triclor 111. We had to have a super chiller added
to the top of the vapor chamber. The retrofit puts our loss at about
five gallons per month. It does not matter whether the machine is
running or not. The super chiller runs 24 hours a day.

The distillation from the boil sump, in our machine, is returned to the
cool rinse sump. This process dilutes contamination in the rinse sump.
The volume of the rinse sump is distilled about once every hour and 15
minutes. The over flow returns to the boil sump.

We noticed reduced cleaning after about three weeks. White residue after
rinse. We reduced the problem by switching on the boil sump heaters two
hours before the shift start  and continuing to boil for two hours after
the shift end.

If you are using an old degreaser, like we are, and a solvent that boils
below 100 degrees F, I suspect that switching off the machine at night
will not buy you much in terms of loss. It will cause you headaches.
Invest in a solvent "sniffer", they are a couple of hundred bucks. Find
the sources of the loss. If the loss is over the top (not enough
freeboard) you need to have the machine retrofitted for your solvent. If
not, look for leaks. We have found leaks in the strangest places.

Subject:
        vapor degreasers
    Date:
        Fri, 3 Seep 1999 12:01:05 -0400
   From:
        "lustig, Steven K.." <[log in to unmask]>



Technetters,

Do any of you know if you should turn a vapor degreaser off when you are
not
using it (say overnight)?  We have one control for the boiling tank and
the
cooling coils together and had originally been told by the vendor to
keep it
on but we are losing a lot of expensive solvent so now the vendor says
to
turn it off.  But if the lid is closed and the cooling coils are also
running, shouldn't solvent loss be minimal?

Thanks for any input.

-Steve


Steven K. Lustig
Process Engineer
EMS Technologies, Inc.
Norcross, GA
(770) 263-9200 x4714
[log in to unmask]

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