You might also check every year the condition of the exhaust duct - it will
be liberally coated and that will have reduced the exhaust efficiency -
over-engineer, over-engineer, over-engineer....
Graham Naisbitt
On 16/2/06 16:01, "Douglas O. Pauls" <[log in to unmask]> wrote:
> 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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