Hi Peter,

Kyzen and I have fought that battle in the past on an old Tooltronics
UltraClean II and a Triton with Aquanox XJN.  We went from making a gallon
add daily to four gallons/day before we solved it.  (20 gallons was a
complete charge of the system.)  Kyzen was very responsive and their
regional tech rep. showed up to help within days.

We did the same stuff you've done in your trouble shooting - blocked the
overflow drain & killed the auto refill (that was murder in the beginning).
We also checked for any solution overflow into down stream chambers - look
for scum rings on the tank walls.  We also checked for evaporation and
considered buying a vapor recovery system but it turns out we didn't need
it.  When the wash sump is idle the chemistry losses due to evaporation are
very low - the stuff's heavier than water and sinks to the sump's bottom.
You do lose water though.  We were running at 130 F and 30 psi.

In the UltraClean II case, the operators were manually overfilling the wash
sump with water and then making the chemistry add.  Pure Chemistry was
overflowing into the isolation chamber and going straight to Drain.  They
were also placing product on the conveyor very close together that
drastically increase solution dragout.  We had to retrain everybody to
follow the procedures and show them what was happening to make it stick.

In the Triton case, the rinse drain & overfill were scaled shut (from the
previous chemistry) and the rinse water cascaded back into the wash sump,
overfilling and draining.  We had to replace the drain & overflow piping in
the Rinse Sections - way too much buildup to descale.

Hans

Integrity First  -  Service Before Self  -  Excellence in All We Do
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hans M. Hinners
Electronics Engineer
Warner Robins - Air Logistics Center (WR-ALC/LUGE)
226 Cochran Street
Robins AFB GA 31098-1622

mailto:[log in to unmask]

Com: (478) 926 - 5224
Fax:   (478) 926 - 4911
DSN Prefix: 468


-----Original Message-----
From: peter lee [mailto:[log in to unmask]]
Sent: Thursday, January 24, 2002 12:11 PM
To: [log in to unmask]
Subject: [TN] Noclean process chemistry loss


Hello,

We are trouble shooting our Stolting in-line cleaning
machine and no-clean washing process. We have been
seeing significant solvent (Kyzen) and water loss
(~3.5 gallon per hr) in the wash tank. The wash tank
was running @135F/75 psi. Chemistry concentration
remains relatively constant after wash.

So far we have tried the following to eliminate
possibilities of leakage and drainage: shutting off
all overflow drain valves/ Air knifes were installed
to isolate the wash tank from both sides. Auto
refilling was cutoff during measurement run.

My question: Has anyone experienced and trouble shot
this problem before? How significant is the loss due
to evaporation? Any suggestion would be appreciated.

Rgds,
Peter

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