Steven,

I turn my degreaser off at night, but it was designed that way.  The lid has
an air tight seal that keeps the vapors confined in the unit whether or not
the unit is off or on.

With the heaters off, if you don't have a lid with a tight seal, you will
loose some solvent when the chiller is working and will loose tons of it
when the chiller is off - assuming that the solvent is rather volatile.

Running the heaters & chillers 24 hours a day doesn't sound like a smart
thing to do as it helps to drive off the solvent faster, as you've
discovered.  Is there a way for you to have the heater off and the chiller
on?  If you have expensive solvent, this is what you may want to do if you
don't have a tight lid.

Today's high performance degreasers are often designed to work optimally
with a particular solvent system.  The solvents can be very expensive, so
good degreaser design is essential to minimize solvent loss.  Was the
degreaser designed to work with your high dollar solvent?  If not, you may
have to make some compromises to minimize losses.

Good luck,

Kathie Lambert
Process Engineer
Northrop Grumman
Baltimore, MD
410-765-9746


        -----Original Message-----
        From:   Lustig, Steven K.. [SMTP:[log in to unmask]]
        Sent:   Friday, September 03, 1999 12:01 PM
        To:     [log in to unmask]
        Subject:        [TN] vapor degreasers

        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]

        ##############################################################
        TechNet Mail List provided as a free service by IPC using LISTSERV
1.8c
        ##############################################################
        To subscribe/unsubscribe, send a message to [log in to unmask] with
following text in
        the body:
        To subscribe:   SUBSCRIBE TECHNET <your full name>
        To unsubscribe:   SIGNOFF TECHNET
        ##############################################################
        Please visit IPC web site (http://www.ipc.org/html/forum.htm) for
additional
        information.
        If you need assistance - contact Gayatri Sardeshpande at
[log in to unmask] or
        847-509-9700 ext.5365
        ##############################################################

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################