They are both inexpensive and ineffective. :-) The moisture trap will
capture much, but not all, of the condensed filthy oil emulsion (often
rusty, to boot!). It will not remove humidity from the compressed air.
As the air loses pressure at the gun, adiabatic expansion will cause it
to cool (the opposite of the heat generated at the compressor) and
further condensation will occur, causing droplets to impinge on the
workpiece. The oil filter may remove half of the oil droplets, assuming
you are not using a Rootes oil-less compressor. You also should have a 5
um mechanical filter, followed by a 0.5 um one to eliminate particulate
matter.
I have always promoted the idea of blowing from distilled, bottled air
or, better, nitrogen. It costs more, but is moisture-free, oil-free and
particle-free.
Brian
Dehoyos, Ramon wrote:
> Need to have an oil trap filter and a moisture trap filter before the gun. They are both inexpensive.
> Regards,
> Ramon
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Boucher, Mark
> Sent: Monday, October 04, 2004 4:32 PM
> To: [log in to unmask]
> Subject: Re: [TN] Compressed air vs. ESD Concern
>
>
> We also use SIMCO Top Gun. Nice adjustment right at point of use. Just need 110V outlet for power supply and shop air. For something fixed in a process, I've used an air knife with ionizer built in from Exair.
>
> Mark G Boucher
> Engineering Manager
> Zebra Technologies
> 30 Plan Way
> Warwick, RI 02886
>
> 401.739.5800 X311
> [log in to unmask]
>
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Phil Nutting
> Sent: Monday, October 04, 2004 2:48 PM
> To: [log in to unmask]
> Subject: Re: [TN] Compressed air vs. ESD Concern
>
>
> Can anyone recommend a deionizing gun?
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Morse, Carrie
> Sent: Monday, October 04, 2004 12:31 PM
> To: [log in to unmask]
> Subject: Re: [TN] Compressed air vs. ESD Concern
>
>
> You might want to consider putting a deionizing gun at the end of the
> hose.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Korringa, Stuart
> (AGRE)
> Sent: Monday, October 04, 2004 11:53 AM
> To: [log in to unmask]
> Subject: [TN] Compressed air vs. ESD Concern
>
> TechNetters,
>
> Is the use of compressed air for removing loose foreign object
> an ESD concern for CCAs?
>
> Stuart Korringa
> Product Quality Engineer
> Smiths Aerospace
> Electronic Systems- Grand Rapids
> 3290 Patterson Ave. S.E.
> Grand Rapids, MI. 49512-1991
> Phone: 616.241.8189
> Fax: 616.241.7736
> E-mail: [log in to unmask]
>
>
>
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