Charles,

I too have used N2 for blow off for over 20 years. It is excellent as you
don't have to worry about mositure or oil.  However, I agree with Ron that
you should reduce the pressure to about 30psi, not only to prevent damage
but as a safety concern for operators.

Bruce Misner

> ----------
> From:         Dieselberg, Ron[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;Dieselberg, Ron
> Sent:         Monday, August 28, 2000 10:03 AM
> To:   [log in to unmask]
> Subject:      Re: [TN] Another ESD question
>
> Charles, we have used dry nitrogen (boil off from a large liquid tank)to
> blow off PWB's, PWA's, etc. for about 15 years and it works very well. We,
> however, limit the pressure to about 25 to 35 psi to prevent damage to
> small
> delicate parts. The really good part is that it is more contaminate free
> than anything else you will find.
> Ron Dieselberg
> BAE SYSTEMS
> Cincinnati Electronics Corp.
>
> -----Original Message-----
> From: [log in to unmask] [mailto:[log in to unmask]]
> Sent: Monday, August 28, 2000 10:41
> To: [log in to unmask]
> Subject: [TN] Another ESD question
>
>
> How do you folks feel about using compressed nitrogen to dry printed
> circuit
> boards? One of our customers will not allow aqueous cleaning of their
> hardware.
> As a result we clean all of their hardware in alcohol and dry by blowing
> it
> off
> with compressed nitrogen with the regulator at about 100 PSI. The nozzle
> is
> grounded at the tip. Please note that this is not related to my earlier
> quetion
> as this is done in a different area and only used on our space flight
> hardware.
> Thanks again,
> Charles Caswell
>
> ##############################################################
> 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 Keach Sasamori at [log in to unmask] or
> 847-509-9700 ext.5315
> ##############################################################
>
> ##############################################################
> 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 Keach Sasamori at [log in to unmask] or
> 847-509-9700 ext.5315
> ##############################################################
>

##############################################################
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 Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################