No use venting over it, after an exhausting search it was a metals sweep
by Brian in the NTC event.
Dewey
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brian Ellis
Sent: Tuesday, February 21, 2006 5:58 AM
To: [log in to unmask]
Subject: Re: [TN] Zero Emissions Spray Booth
I didn't know avian flue influenced the electronics industry :-)
Brian
John Burke wrote:
> The height above the roof is very important. Too high and it will be
> an aircraft hazard, too low and the pile of deceased pigeons on the
> roof may eventually block the exhaust flow............8-)
>
> Happy Friday TechNetters...
>
> John
>
> John Burke
> Senior Manager - Operations , Optichron [log in to unmask]
> W: 510 249 5233
> M: 408 515 4992
> http://www.optichron.com
> Profile: https://www.linkedin.com/e/fps/2665502/
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Dehoyos, Ramon
> Sent: Friday, February 17, 2006 9:01 AM
> To: [log in to unmask]
> Subject: Re: [TN] Zero Emissions Spray Booth
>
> Hi Doug:
> What you mean is negative pressure. Air should
> pulled from the end of the exhaust tube instead of pushed from the
> bottom. If it is pushed, ( blower is over the hood ) the tube leaks
> will exhaust fumes into the building which is bad. If it is pulled
> (blower on the roof ) the tube leaks dilute the fumes more, which is
> good. By regulations the velocity at exits has to be some many feet
> per second, depending on the area and the end of the tube has to be
> some many feet above the roof, to avoid fumes from accumulating on the
roof.
> Regards,
> Ramon
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas O. Pauls
> Sent: Thursday, February 16, 2006 11:01 AM
> To: [log in to unmask]
> Subject: Re: [TN] Zero Emissions Spray Booth
>
> Amol,
> In my opinion, "Zero Emissions" exists only in the minds of regulators
> and salesmen. What they are talking about is a positive air flow
> spray booth that sucks all VOCs into one air stream. That air stream
> becomes subsequently filtered, usually through a charcoal medium, such
> that any exhaust from the filter contains no VOCs or other regulated
emissions.
> If your spray booth exhaust is not filtered, even if properly
> permitted, then it has emissions.
>
> Doug Pauls
> Rockwell Collins
>
>
>
>
> "Kane, Amol
> (349)"
> <akane@HARVARDGRP
> To
> .COM> [log in to unmask]
> Sent by: TechNet
> cc
> <[log in to unmask]>
>
> Subject
> [TN] Zero Emissions Spray Booth
> 02/16/2006 08:11
> AM
>
>
> Please respond to
> TechNet E-Mail
> Forum
> <[log in to unmask]>
> ; Please respond
> to
> "Kane, Amol
> (349)"
> <akane@HARVARDGRP
> .COM>
>
>
>
>
>
>
> Dear TechNetters,
> A question was recently asked by a customer whether we have a "Zero
> Emissions Spray Booth" for conformal coating applications. We spray
> polyurethane, acrylic, epoxy and silicon coatings. We have an exhaust
> type spray booth to remove harmful vapors from the coating room. Can
> anyone shed some light on the Zero Emissions Spray Booth concept so
> that I can evaluate our existing infrastructure against the
> requirements and make upgrades if necessary.
>
> Thanks in advance,
>
> Amol Kane
> M.S (Industrial Eng.)
> Process Engineer
> Harvard Custom Manufacturing
> 941 Route 38 Owego, NY 13827
> Phone: (607) 687-7669 x349
> [log in to unmask]
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Dehoyos, Ramon
> Sent: Thursday, February 16, 2006 8:33 AM
> To: [log in to unmask]
> Subject: Re: [TN] BGA Reflow profile - Thermocouples
>
> Hi Dominic:
> It should not cost you much to find out what is the
> temperature of a board through reflow. The investment of buying a Mole
> or other similar device, that will allow you to record the profile of
> a board through an oven is only "once". If you are using eutectic
> solder and your coldest components sees 20 degrees over the melting
> point which is
> 203 C and you are not exceeding the highest temp that the most
> sensitive component may withstand, then you have a working profile,
> that simple.
> Regards,
> Ramon
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Dominic Boudreau
> Sent: Wednesday, February 15, 2006 5:50 PM
> To: [log in to unmask]
> Subject: [TN] BGA Reflow profile - Thermocouples
>
> Hello Techneter's,
>
> I am working on a procedure to make the reflow profile of a PCB.
>
> What are the techniques to know where to attach the thermocouples on
> the "PCB"? I already know that it should be where we have the coldest
> and hottest spot but is it possible to know when we "must" test a BGA
> to have a better reflow profile. We are a little company so we don't
> have the money to test a BGA each time we have one on a PCB.
>
>
>
> Thank you
>
>
>
>
>
>
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